; ******************************************************************************
- ; ----------------------------------------------------------------------
- ;
- ; Header. Includes jump table and constants.
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; Header. Includes jump table and constants.
+ ;
+ ; ----------------------------------------------------------------------
.segment "JUMPTABLE"
; Header
- .byte $74, $67, $69 ; "tgi"
- .byte TGI_API_VERSION ; TGI API version number
- .word x_res ; X resolution
- .word y_res ; Y resolution
- .byte colors ; Number of drawing colors
- .byte pages ; Number of screens available
- .byte 8 ; System font X size
- .byte 8 ; System font Y size
- .word aspect ; Aspect ratio
+ .byte $74, $67, $69 ; "tgi"
+ .byte TGI_API_VERSION ; TGI API version number
+ .word x_res ; X resolution
+ .word y_res ; Y resolution
+ .byte colors ; Number of drawing colors
+ .byte pages ; Number of screens available
+ .byte 8 ; System font X size
+ .byte 8 ; System font Y size
+ .word aspect ; Aspect ratio
.byte 0 ; TGI driver flags
; Function table
- .addr INSTALL
- .addr UNINSTALL
- .addr INIT
- .addr DONE
- .addr GETERROR
- .addr CONTROL
- .addr CLEAR
- .addr SETVIEWPAGE
- .addr SETDRAWPAGE
- .addr SETCOLOR
- .addr SETPALETTE
- .addr GETPALETTE
- .addr GETDEFPALETTE
- .addr SETPIXEL
- .addr GETPIXEL
- .addr LINE
- .addr BAR
- .addr TEXTSTYLE
- .addr OUTTEXT
- .addr 0 ; IRQ entry is unused
+ .addr INSTALL
+ .addr UNINSTALL
+ .addr INIT
+ .addr DONE
+ .addr GETERROR
+ .addr CONTROL
+ .addr CLEAR
+ .addr SETVIEWPAGE
+ .addr SETDRAWPAGE
+ .addr SETCOLOR
+ .addr SETPALETTE
+ .addr GETPALETTE
+ .addr GETDEFPALETTE
+ .addr SETPIXEL
+ .addr GETPIXEL
+ .addr LINE
+ .addr BAR
+ .addr TEXTSTYLE
+ .addr OUTTEXT
+ .addr 0 ; IRQ entry is unused
; ******************************************************************************
- ; ----------------------------------------------------------------------
- ;
- ; Parameters
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; Parameters
+ ;
+ ; ----------------------------------------------------------------------
- x1 := ptr1
- y1 := ptr2
- x2 := ptr3
- y2 := ptr4
- radius := tmp1
+ x1 := ptr1
+ y1 := ptr2
+ x2 := ptr3
+ y2 := ptr4
+ radius := tmp1
; ******************************************************************************
- ; ----------------------------------------------------------------------
- ;
- ; Global variables
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; Global variables
+ ;
+ ; ----------------------------------------------------------------------
- sptr := regsave + 2
+ sptr := regsave + 2
.bss
- error:
- .res 1 ; Error code
+ error:
+ .res 1 ; Error code
.if ::grmode = 9 || ::grmode = 11
- palette = default_palette
+ palette = default_palette
.else
- palette:
- .res colors ; The current palette
+ palette:
+ .res colors ; The current palette
.endif
- mask:
- .res 1 ; Current pixel mask
- griocb:
- .res 1 ; IOCB channel number for graphics
+ mask:
+ .res 1 ; Current pixel mask
+ griocb:
+ .res 1 ; IOCB channel number for graphics
.if pages = 2
- p0scr:
- .res 1 ; High byte of screen address for screen page 0
- p0dls:
- .res 1 ; High byte of display list address for screen page 0
- ; Page 1's addresses are 8K higher
+ p0scr:
+ .res 1 ; High byte of screen address for screen page 0
+ p0dls:
+ .res 1 ; High byte of display list address for screen page 0
+ ; Page 1's addresses are 8K higher
.endif
.data
- mag_x:
- .byte 1 ; Horizontal text scaling factor
- mag_y:
- .byte 1 ; Vertical text scaling factor
- mag_x8:
- .word 8 ; Horizontal text scaling factor * 8
- mag_y8:
- .word 8 ; Vertical text scaling factor * 8
- text_dir:
- .byte 0 ; Text direction,
+ mag_x:
+ .byte 1 ; Horizontal text scaling factor
+ mag_y:
+ .byte 1 ; Vertical text scaling factor
+ mag_x8:
+ .word 8 ; Horizontal text scaling factor * 8
+ mag_y8:
+ .word 8 ; Vertical text scaling factor * 8
+ text_dir:
+ .byte 0 ; Text direction,
.code
; ******************************************************************************
-.macro put_pixel
+.macro put_pixel
- ; ----------------------------------------------------------------------
- ;
- ; Put a pixel at (sptr),y using x as the bit mask offset
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; Put a pixel at (sptr),y using x as the bit mask offset
+ ;
+ ; ----------------------------------------------------------------------
- lda (sptr),y
- eor mask
- and mask_table,x
- eor (sptr),y
- sta (sptr),y
+ lda (sptr),y
+ eor mask
+ and mask_table,x
+ eor (sptr),y
+ sta (sptr),y
.endmacro
; ******************************************************************************
.rodata
screen_device:
- .byte "S:",$9B ; Device code for screen
+ .byte "S:",$9B ; Device code for screen
screen_device_length := * - screen_device
.code
.proc INIT
- ; ----------------------------------------------------------------------
- ;
- ; INIT: Switch to graphics mode
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; INIT: Switch to graphics mode
+ ;
+ ; ----------------------------------------------------------------------
.code
- ; Initialize drawing color
+ ; Initialize drawing color
.if ::ppb = 8
- ldx #$FF
+ ldx #$FF
.elseif ::ppb = 4
- ldx #$55
+ ldx #$55
.elseif ::ppb = 2
- ldx #$11
+ ldx #$11
.endif
- stx mask
+ stx mask
- ; Find a free IOCB
- lda #$70
+ ; Find a free IOCB
+ lda #$70
search: tax
- ldy ICHID,x
- cpy #$FF
- beq found
- sub #$10
- bcs search
-
- ; Not enough resources available (free IOCB or memory)
- ; enter with C cleared!
-nores: lda #TGI_ERR_NO_RES
- bcc exit
-
-found: ; Check if enough RAM is available
- lda #0
- sub #<mem_needed
- tay
- lda RAMTOP
- sbc #>mem_needed
- cmp APPMHI + 1
- bcc nores
- bne switch
- cpy APPMHI
- bcc nores ; not enough memory
-
- ; Switch into graphics mode
-switch: lda #OPEN
- sta ICCOM,x
- lda #OPNIN | OPNOT
- sta ICAX1,x
- lda #::grmode
- sta ICAX2,x
- lda #<screen_device
- sta ICBAL,x
- lda #>screen_device
- sta ICBAH,x
- lda #<screen_device_length
- sta ICBLL,x
- lda #>screen_device_length
- sta ICBLH,x
- jsr CIOV
+ ldy ICHID,x
+ cpy #$FF
+ beq found
+ sub #$10
+ bcs search
+
+ ; Not enough resources available (free IOCB or memory)
+ ; enter with C cleared!
+nores: lda #TGI_ERR_NO_RES
+ bcc exit
+
+found: ; Check if enough RAM is available
+ lda #0
+ sub #<mem_needed
+ tay
+ lda RAMTOP
+ sbc #>mem_needed
+ cmp APPMHI + 1
+ bcc nores
+ bne switch
+ cpy APPMHI
+ bcc nores ; not enough memory
+
+ ; Switch into graphics mode
+switch: lda #OPEN
+ sta ICCOM,x
+ lda #OPNIN | OPNOT
+ sta ICAX1,x
+ lda #::grmode
+ sta ICAX2,x
+ lda #<screen_device
+ sta ICBAL,x
+ lda #>screen_device
+ sta ICBAH,x
+ lda #<screen_device_length
+ sta ICBLL,x
+ lda #>screen_device_length
+ sta ICBLH,x
+ jsr CIOV
.if ::pages = 2
- ; Reserve 8K of high memory
- lda RAMTOP
- sub #32
- sta RAMTOP
- ; Close and reopen graphics
- lda #CLOSE
- sta ICCOM,x
- jsr CIOV
- ; Reopen graphics
- lda #OPEN
- sta ICCOM,x
- lda #OPNIN | OPNOT
- sta ICAX1,x
- lda #::grmode
- sta ICAX2,x
- lda #<screen_device
- sta ICBAL,x
- lda #>screen_device
- sta ICBAH,x
- lda #<screen_device_length
- sta ICBLL,x
- lda #>screen_device_length
- sta ICBLH,x
- jsr CIOV
- ; Save screen pointers
- lda SAVMSC + 1
- sta p0scr
- lda SDLSTH
- sta p0dls
+ ; Reserve 8K of high memory
+ lda RAMTOP
+ sub #32
+ sta RAMTOP
+ ; Close and reopen graphics
+ lda #CLOSE
+ sta ICCOM,x
+ jsr CIOV
+ ; Reopen graphics
+ lda #OPEN
+ sta ICCOM,x
+ lda #OPNIN | OPNOT
+ sta ICAX1,x
+ lda #::grmode
+ sta ICAX2,x
+ lda #<screen_device
+ sta ICBAL,x
+ lda #>screen_device
+ sta ICBAH,x
+ lda #<screen_device_length
+ sta ICBLL,x
+ lda #>screen_device_length
+ sta ICBLH,x
+ jsr CIOV
+ ; Save screen pointers
+ lda SAVMSC + 1
+ sta p0scr
+ lda SDLSTH
+ sta p0dls
.endif ; ::pages = 2
- stx griocb
+ stx griocb
- ; Reset the error code and return
+ ; Reset the error code and return
lda #TGI_ERR_OK
-exit: sta error
+exit: sta error
rts
.endproc
.proc DONE
- ; ----------------------------------------------------------------------
- ;
- ; DONE: Switch back to text mode
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; DONE: Switch back to text mode
+ ;
+ ; ----------------------------------------------------------------------
.code
.if ::pages = 2
- ; Free 8K of high memory
- lda RAMTOP
- add #32
- sta RAMTOP
+ ; Free 8K of high memory
+ lda RAMTOP
+ add #32
+ sta RAMTOP
.endif
- ; Clear griocb
- lda #$FF
- ldx griocb
- sta griocb
-
- ; Close the S: device
- lda #CLOSE
- sta ICCOM,x
- jsr CIOV
-
- ; Reopen it in Graphics 0
- lda #OPEN
- sta ICCOM,x
- lda #OPNIN | OPNOT
- sta ICAX1,x
- lda #0
- sta ICAX2,x
- lda #<screen_device
- sta ICBAL,x
- lda #>screen_device
- sta ICBAH,x
- lda #<screen_device_length
- sta ICBLL,x
- lda #>screen_device_length
- sta ICBLH,x
- jsr CIOV
-
- ; Now close it again; we don't need it anymore :)
- lda #CLOSE
- sta ICCOM,x
- jmp CIOV
+ ; Clear griocb
+ lda #$FF
+ ldx griocb
+ sta griocb
+
+ ; Close the S: device
+ lda #CLOSE
+ sta ICCOM,x
+ jsr CIOV
+
+ ; Reopen it in Graphics 0
+ lda #OPEN
+ sta ICCOM,x
+ lda #OPNIN | OPNOT
+ sta ICAX1,x
+ lda #0
+ sta ICAX2,x
+ lda #<screen_device
+ sta ICBAL,x
+ lda #>screen_device
+ sta ICBAH,x
+ lda #<screen_device_length
+ sta ICBLL,x
+ lda #>screen_device_length
+ sta ICBLH,x
+ jsr CIOV
+
+ ; Now close it again; we don't need it anymore :)
+ lda #CLOSE
+ sta ICCOM,x
+ jmp CIOV
.endproc
; ******************************************************************************
.proc GETERROR
- ; ----------------------------------------------------------------------
- ;
- ; GETERROR: Return the error code in A and clear it
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; GETERROR: Return the error code in A and clear it
+ ;
+ ; ----------------------------------------------------------------------
.code
- ldx #TGI_ERR_OK
- lda error
- stx error
- rts
+ ldx #TGI_ERR_OK
+ lda error
+ stx error
+ rts
.endproc
; ******************************************************************************
.proc CLEAR
- ; ----------------------------------------------------------------------
- ;
- ; CLEAR: Clear the screen
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; CLEAR: Clear the screen
+ ;
+ ; ----------------------------------------------------------------------
.code
- ; Load the screen address in sptr
- lda SAVMSC
- sta sptr
- lda SAVMSC + 1
- sta sptr + 1
+ ; Load the screen address in sptr
+ lda SAVMSC
+ sta sptr
+ lda SAVMSC + 1
+ sta sptr + 1
- ; Fill with zero
- lda #0
- tay
+ ; Fill with zero
+ lda #0
+ tay
.if >::scrsize > 0
- ; Clear full pages if any
- ldx #>::scrsize
-loop1: sta (sptr),y
- iny
- bne loop1
- inc sptr + 1
- dex
- bne loop1
+ ; Clear full pages if any
+ ldx #>::scrsize
+loop1: sta (sptr),y
+ iny
+ bne loop1
+ inc sptr + 1
+ dex
+ bne loop1
.endif
.if <::scrsize > 0
- ; Clear the rest, if any
-loop2: sta (sptr),y
- iny
- cpy #<::scrsize
- bne loop2
+ ; Clear the rest, if any
+loop2: sta (sptr),y
+ iny
+ cpy #<::scrsize
+ bne loop2
.endif
rts
.proc GETPALETTE
- ; ----------------------------------------------------------------------
- ;
- ; GETPALETTE: Return the current palette in A/X
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; GETPALETTE: Return the current palette in A/X
+ ;
+ ; ----------------------------------------------------------------------
.code
lda #<palette
.proc GETDEFPALETTE
- ; ----------------------------------------------------------------------
- ;
- ; GETDEFPALETTE: Return the default palette in A/X
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; GETDEFPALETTE: Return the default palette in A/X
+ ;
+ ; ----------------------------------------------------------------------
.code
lda #<default_palette
.proc SETCOLOR
- ; ----------------------------------------------------------------------
- ;
- ; SETCOLOR: Set the drawing color (in A)
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; SETCOLOR: Set the drawing color (in A)
+ ;
+ ; ----------------------------------------------------------------------
.code
- tax
+ tax
.if ::grmode = 9
- ; Map colors like this: 0 -> 0, 1 -> 15, 2 -> 1, 3 -> 2 etc.
- beq cont
- cpx #1
- bne map
- ldx #16
-map: dex
+ ; Map colors like this: 0 -> 0, 1 -> 15, 2 -> 1, 3 -> 2 etc.
+ beq cont
+ cpx #1
+ bne map
+ ldx #16
+map: dex
cont:
.endif
- lda masks,x
- sta mask
- rts
+ lda masks,x
+ sta mask
+ rts
.endproc
; ******************************************************************************
.proc CALC
- ; ----------------------------------------------------------------------
- ;
- ; CALC: Calculate the screen address
- ; in
- ; x1 (ptr1) x coordinate
- ; y1 (ptr2) y coordinate
- ; out
- ; sptr + y screen address
- ; x bit mask index
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; CALC: Calculate the screen address
+ ; in
+ ; x1 (ptr1) x coordinate
+ ; y1 (ptr2) y coordinate
+ ; out
+ ; sptr + y screen address
+ ; x bit mask index
+ ;
+ ; ----------------------------------------------------------------------
.bss
- temp: .res 1
+ temp: .res 1
.code
- ; calculate line offset
- lda y1 + 1
- sta temp
- lda y1
+ ; calculate line offset
+ lda y1 + 1
+ sta temp
+ lda y1
.if ::x_res / ::ppb = 40
- yrep = 3
+ yrep = 3
.elseif ::x_res / ::ppb = 20
- yrep = 2
+ yrep = 2
.elseif ::x_res / ::ppb = 10
- yrep = 1
+ yrep = 1
.endif
-.repeat yrep
- asl a
- rol temp
+.repeat yrep
+ asl a
+ rol temp
.endrepeat
- sta sptr
- ldx temp
- stx sptr + 1
+ sta sptr
+ ldx temp
+ stx sptr + 1
-.repeat 2
- asl a
- rol temp
+.repeat 2
+ asl a
+ rol temp
.endrepeat
- add sptr
- sta sptr
- lda temp
- adc sptr + 1
- sta sptr + 1
+ add sptr
+ sta sptr
+ lda temp
+ adc sptr + 1
+ sta sptr + 1
- ; calculate bit mask offset
- lda x1
- and #ppb - 1
- tax
+ ; calculate bit mask offset
+ lda x1
+ and #ppb - 1
+ tax
- ; calculate row offset
- lda x1 + 1
- sta temp
- lda x1
+ ; calculate row offset
+ lda x1 + 1
+ sta temp
+ lda x1
.if ::ppb = 8
- xrep = 3
+ xrep = 3
.elseif ::ppb = 4
- xrep = 2
+ xrep = 2
.elseif ::ppb = 2
- xrep = 1
+ xrep = 1
.endif
-.repeat xrep
- lsr temp
- ror a
+.repeat xrep
+ lsr temp
+ ror a
.endrepeat
- tay
+ tay
- ; sptr += SAVMSC
- lda SAVMSC
- add sptr
- sta sptr
- lda SAVMSC + 1
- adc sptr + 1
- sta sptr + 1
+ ; sptr += SAVMSC
+ lda SAVMSC
+ add sptr
+ sta sptr
+ lda SAVMSC + 1
+ adc sptr + 1
+ sta sptr + 1
- ; We're done!
- rts
+ ; We're done!
+ rts
.endproc
; ******************************************************************************
.proc SETPIXEL
- ; ----------------------------------------------------------------------
- ;
- ; Draw one pixel at x1, y1
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; Draw one pixel at x1, y1
+ ;
+ ; ----------------------------------------------------------------------
.code
- jsr CALC
- put_pixel
- rts
+ jsr CALC
+ put_pixel
+ rts
.endproc
; ******************************************************************************
.proc GETPIXEL
- ; ----------------------------------------------------------------------
- ;
- ; GETPIXEL: Read the color value of a pixel and return it in A/X
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; GETPIXEL: Read the color value of a pixel and return it in A/X
+ ;
+ ; ----------------------------------------------------------------------
.code
- jsr CALC
- lda (sptr),y
- and mask_table,x
+ jsr CALC
+ lda (sptr),y
+ and mask_table,x
.if ::ppb = 8
- beq zero
- lda #1
-zero: ldx #0
- rts
+ beq zero
+ lda #1
+zero: ldx #0
+ rts
.elseif ::ppb = 4
-loop: cpx #3
- beq done4
- lsr a
- lsr a
- inx
- bne loop
-done4: and #$03
- ldx #0
- rts
+loop: cpx #3
+ beq done4
+ lsr a
+ lsr a
+ inx
+ bne loop
+done4: and #$03
+ ldx #0
+ rts
.elseif ::ppb = 2
- dex
- bne shift
- and #$0F
- jmp exit
-shift: lsr a
- lsr a
- lsr a
- lsr a
+ dex
+ bne shift
+ and #$0F
+ jmp exit
+shift: lsr a
+ lsr a
+ lsr a
+ lsr a
exit:
.if ::grmode = 9
- ; Mode 9 mapping
- ; Map colors like this: 0 -> 0, 15 -> 1, 2 -> 3, 3 -> 4 etc.
- beq done9
- cmp #15
- bne map9
- lda #0
-map9: add #1
+ ; Mode 9 mapping
+ ; Map colors like this: 0 -> 0, 15 -> 1, 2 -> 3, 3 -> 4 etc.
+ beq done9
+ cmp #15
+ bne map9
+ lda #0
+map9: add #1
done9:
.endif
.if ::grmode = 10
- ; Mode 10 mapping
- ; Map out of range colors like this:
- ; 9 -> 8
- ; 10 -> 8
- ; 11 -> 8
- ; 12 -> 0
- ; 13 -> 1
- ; 14 -> 2
- ; 15 -> 3
- cmp #9
- bcc done10
- sub #12
- bcs done10
- lda #8
+ ; Mode 10 mapping
+ ; Map out of range colors like this:
+ ; 9 -> 8
+ ; 10 -> 8
+ ; 11 -> 8
+ ; 12 -> 0
+ ; 13 -> 1
+ ; 14 -> 2
+ ; 15 -> 3
+ cmp #9
+ bcc done10
+ sub #12
+ bcs done10
+ lda #8
done10:
.endif ; ::grmode = 10
- ; Done!
- ldx #0
- rts
-.endif ; ::ppb = 2
+ ; Done!
+ ldx #0
+ rts
+.endif ; ::ppb = 2
.endproc
.proc LINE
- ; ----------------------------------------------------------------------
- ;
- ; LINE: Draw a line from x1,y1 to x2,y2
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; LINE: Draw a line from x1,y1 to x2,y2
+ ;
+ ; ----------------------------------------------------------------------
.ifdef USE_CIO_LINE
- ; position ptr1, ptr2
- lda x1
- sta OLDCOL
- lda x1 + 1
- sta OLDCOL + 1
- lda y1
- sta OLDROW
- ; plot
- jsr SETPIXEL
- ; position ptr3,ptr4
- lda x2
- sta COLCRS
- lda x2 + 1
- sta COLCRS + 1
- lda y2
- sta ROWCRS
- ; drawto
- ldx griocb
- lda #DRAWLN
- sta ICCOM,x
- lda mask
+ ; position ptr1, ptr2
+ lda x1
+ sta OLDCOL
+ lda x1 + 1
+ sta OLDCOL + 1
+ lda y1
+ sta OLDROW
+ ; plot
+ jsr SETPIXEL
+ ; position ptr3,ptr4
+ lda x2
+ sta COLCRS
+ lda x2 + 1
+ sta COLCRS + 1
+ lda y2
+ sta ROWCRS
+ ; drawto
+ ldx griocb
+ lda #DRAWLN
+ sta ICCOM,x
+ lda mask
.if ::grmode = 10
- and #$0f
+ and #$0f
.else
- and #colors - 1
+ and #colors - 1
.endif
- sta ATACHR
- jmp CIOV
+ sta ATACHR
+ jmp CIOV
-.else ; USE_CIO_LINE
+.else ; USE_CIO_LINE
; locals
- dx := sreg
- dy := y1
- dx2 := x2
- dy2 := y2
- iy := tmp1
- err := tmp3
+ dx := sreg
+ dy := y1
+ dx2 := x2
+ dy2 := y2
+ iy := tmp1
+ err := tmp3
.code
- ; dx = x2 - x1
- lda x2
- sub x1
- sta dx
- lda x2 + 1
- sbc x1 + 1
- sta dx + 1
- ; if dx is positive, no problem
- bcs dx_positive
-
- ; if dx is negative, swap x1,y1 with x2,y2
- lda x1 ; x1 <-> x2, low byte
- ldx x2
- sta x2
- stx x1
- lda x1 + 1 ; x1 <-> x2, high byte
- ldx x2 + 1
- sta x2 + 1
- stx x1 + 1
- lda y1 ; y1 <-> y2, low byte
- ldx y2
- sta y2
- stx y1
- lda y1 + 1 ; y1 <-> y2, high byte
- ldx y2 + 1
- sta y2 + 1
- stx y1 + 1
- ; Calculate again
- jmp LINE
+ ; dx = x2 - x1
+ lda x2
+ sub x1
+ sta dx
+ lda x2 + 1
+ sbc x1 + 1
+ sta dx + 1
+ ; if dx is positive, no problem
+ bcs dx_positive
+
+ ; if dx is negative, swap x1,y1 with x2,y2
+ lda x1 ; x1 <-> x2, low byte
+ ldx x2
+ sta x2
+ stx x1
+ lda x1 + 1 ; x1 <-> x2, high byte
+ ldx x2 + 1
+ sta x2 + 1
+ stx x1 + 1
+ lda y1 ; y1 <-> y2, low byte
+ ldx y2
+ sta y2
+ stx y1
+ lda y1 + 1 ; y1 <-> y2, high byte
+ ldx y2 + 1
+ sta y2 + 1
+ stx y1 + 1
+ ; Calculate again
+ jmp LINE
dx_positive:
- ; Calculate coords
- jsr CALC
-
- ; dy = y2 - y1
- lda y2
- sub y1
- sta dy
- lda y2 + 1
- sbc y1 + 1
- sta dy + 1
-
- ; if dy is negative
- bcs dy_positive
- ; dy = -dy
- lda #0
- sub dy
- sta dy
- lda #0
- sbc dy + 1
- sta dy + 1
- ; iy = -row_size
- lda #<(65536 - x_res / ppb)
- sta iy
- lda #>(65536 - x_res / ppb)
- sta iy + 1
- bne skip_iy_1 ; always
+ ; Calculate coords
+ jsr CALC
+
+ ; dy = y2 - y1
+ lda y2
+ sub y1
+ sta dy
+ lda y2 + 1
+ sbc y1 + 1
+ sta dy + 1
+
+ ; if dy is negative
+ bcs dy_positive
+ ; dy = -dy
+ lda #0
+ sub dy
+ sta dy
+ lda #0
+ sbc dy + 1
+ sta dy + 1
+ ; iy = -row_size
+ lda #<(65536 - x_res / ppb)
+ sta iy
+ lda #>(65536 - x_res / ppb)
+ sta iy + 1
+ bne skip_iy_1 ; always
dy_positive:
- ; iy = row_size
- lda #<(x_res / ppb)
- sta iy
- lda #>(x_res / ppb)
- sta iy + 1
+ ; iy = row_size
+ lda #<(x_res / ppb)
+ sta iy
+ lda #>(x_res / ppb)
+ sta iy + 1
skip_iy_1:
- ; dx2 = dx * 2
- lda dx
- asl a
- sta dx2
- lda dx + 1
- rol a
- sta dx2 + 1
-
- ; dy2 = dy * 2
- lda dy
- asl a
- sta dy2
- lda dy + 1
- rol a
- sta dy2 + 1
-
- ; if dx >= dy
- lda dx
- cmp dy
- lda dx + 1
- sbc dy + 1
- bcc dy_major
-
- ; dx is the major axis
-
- ; err = dy2 - dx
- lda dy2
- sub dx
- sta err
- lda dy2 + 1
- sbc dx + 1
- sta err + 1
-
- .scope
-loop: ; main loop
- put_pixel
- ; if err >= 0
- lda err + 1
- bmi err_neg
- ; err -= dx2
- lda err
- sub dx2
- sta err
- lda err + 1
- sbc dx2 + 1
- sta err + 1
- ; move_vertical (iy)
- lda sptr
- add iy
- sta sptr
- lda sptr + 1
- adc iy + 1
- sta sptr + 1
+ ; dx2 = dx * 2
+ lda dx
+ asl a
+ sta dx2
+ lda dx + 1
+ rol a
+ sta dx2 + 1
+
+ ; dy2 = dy * 2
+ lda dy
+ asl a
+ sta dy2
+ lda dy + 1
+ rol a
+ sta dy2 + 1
+
+ ; if dx >= dy
+ lda dx
+ cmp dy
+ lda dx + 1
+ sbc dy + 1
+ bcc dy_major
+
+ ; dx is the major axis
+
+ ; err = dy2 - dx
+ lda dy2
+ sub dx
+ sta err
+ lda dy2 + 1
+ sbc dx + 1
+ sta err + 1
+
+ .scope
+loop: ; main loop
+ put_pixel
+ ; if err >= 0
+ lda err + 1
+ bmi err_neg
+ ; err -= dx2
+ lda err
+ sub dx2
+ sta err
+ lda err + 1
+ sbc dx2 + 1
+ sta err + 1
+ ; move_vertical (iy)
+ lda sptr
+ add iy
+ sta sptr
+ lda sptr + 1
+ adc iy + 1
+ sta sptr + 1
err_neg:
- ; err += dy2
- lda err
- add dy2
- sta err
- lda err + 1
- adc dy2 + 1
- sta err + 1
- ; move_right
- inx
- cpx #ppb
- bne end_move
- ldx #0
- iny
- bne end_move
- inc sptr + 1
+ ; err += dy2
+ lda err
+ add dy2
+ sta err
+ lda err + 1
+ adc dy2 + 1
+ sta err + 1
+ ; move_right
+ inx
+ cpx #ppb
+ bne end_move
+ ldx #0
+ iny
+ bne end_move
+ inc sptr + 1
end_move:
- ; loop while dx-- >= 0
- lda dx
- ora dx + 1
- beq exit
- dec dx
- lda dx
- cmp #$FF
- bne loop
- dec dx + 1
- jmp loop
-exit: rts
- .endscope
+ ; loop while dx-- >= 0
+ lda dx
+ ora dx + 1
+ beq exit
+ dec dx
+ lda dx
+ cmp #$FF
+ bne loop
+ dec dx + 1
+ jmp loop
+exit: rts
+ .endscope
dy_major:
- ; dy is the major axis
-
- ; err = dx2 - dy;
- lda dx2
- sub dy
- sta err
- lda dx2 + 1
- sbc dy + 1
- sta err + 1
-
- .scope
-loop: ; main loop
- put_pixel
- ; if err >= 0
- lda err + 1
- bmi end_move
- ; err -= dy2
- lda err
- sub dy2
- sta err
- lda err + 1
- sbc dy2 + 1
- sta err + 1
- ; move_right
- inx
- cpx #ppb
- bne end_move
- ldx #0
- iny
- bne end_move
- inc sptr + 1
+ ; dy is the major axis
+
+ ; err = dx2 - dy;
+ lda dx2
+ sub dy
+ sta err
+ lda dx2 + 1
+ sbc dy + 1
+ sta err + 1
+
+ .scope
+loop: ; main loop
+ put_pixel
+ ; if err >= 0
+ lda err + 1
+ bmi end_move
+ ; err -= dy2
+ lda err
+ sub dy2
+ sta err
+ lda err + 1
+ sbc dy2 + 1
+ sta err + 1
+ ; move_right
+ inx
+ cpx #ppb
+ bne end_move
+ ldx #0
+ iny
+ bne end_move
+ inc sptr + 1
end_move:
- ; err += dx2
- lda err
- add dx2
- sta err
- lda err + 1
- adc dx2 + 1
- sta err + 1
- ; move_vertical(iy)
- lda sptr
- add iy
- sta sptr
- lda sptr + 1
- adc iy + 1
- sta sptr + 1
- ; loop while dy-- >= 0
- lda dy
- ora dy + 1
- beq exit
- dec dy
- lda dy
- cmp #$FF
- bne loop
- dec dy + 1
- jmp loop
-exit: rts
- .endscope
-.endif ; USE_CIO_LINE
+ ; err += dx2
+ lda err
+ add dx2
+ sta err
+ lda err + 1
+ adc dx2 + 1
+ sta err + 1
+ ; move_vertical(iy)
+ lda sptr
+ add iy
+ sta sptr
+ lda sptr + 1
+ adc iy + 1
+ sta sptr + 1
+ ; loop while dy-- >= 0
+ lda dy
+ ora dy + 1
+ beq exit
+ dec dy
+ lda dy
+ cmp #$FF
+ bne loop
+ dec dy + 1
+ jmp loop
+exit: rts
+ .endscope
+.endif ; USE_CIO_LINE
.endproc
; ******************************************************************************
.proc clipped_bar
- ; ----------------------------------------------------------------------
- ;
- ; Clip and draw bar, this function will disappear when text clipping
- ; will be done int the TGI kernel
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; Clip and draw bar, this function will disappear when text clipping
+ ; will be done int the TGI kernel
+ ;
+ ; ----------------------------------------------------------------------
.code
- lda y1 + 1
- bne off
- lda y1
- cmp #y_res
- bcs off
+ lda y1 + 1
+ bne off
+ lda y1
+ cmp #y_res
+ bcs off
- lda x1 + 1
+ lda x1 + 1
.if >(::x_res - 1) > 0
- cmp #>x_res
- bcc check2
+ cmp #>x_res
+ bcc check2
.endif
- bne off
- lda x1
- cmp #<x_res
- bcc check2
-off: rts
+ bne off
+ lda x1
+ cmp #<x_res
+ bcc check2
+off: rts
-check2: lda y2 + 1
- bne off
- lda y2
- cmp #y_res
- bcs off
+check2: lda y2 + 1
+ bne off
+ lda y2
+ cmp #y_res
+ bcs off
- lda x2 + 1
+ lda x2 + 1
.if >(::x_res - 1) > 0
- cmp #>x_res
- bcc BAR
+ cmp #>x_res
+ bcc BAR
.endif
- bne off
- lda x2
- cmp #<x_res
- bcs off
+ bne off
+ lda x2
+ cmp #<x_res
+ bcs off
.endproc
; ******************************************************************************
.proc BAR
- ; ----------------------------------------------------------------------
- ;
- ; BAR: Draw a filled rectangle with the corners at x1,y1,x2,y2
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; BAR: Draw a filled rectangle with the corners at x1,y1,x2,y2
+ ;
+ ; ----------------------------------------------------------------------
; locals
- lmem := sreg
+ lmem := sreg
.bss
- lmask: .res 1
- rmask: .res 1
- dy: .res 1
- dx: .res 1
- fmask: .res 1
+ lmask: .res 1
+ rmask: .res 1
+ dy: .res 1
+ dx: .res 1
+ fmask: .res 1
.code
- ; dy = y2 - y1 + 1
- lda y2
- sub y1
- sta dy
- inc dy
- ; Calculate upper left corner
- jsr CALC
- ; Save the values
- tya
- add sptr
- sta lmem
- lda sptr + 1
- adc #0
- sta lmem + 1
- lda bar_table,x
- sta lmask
- ; Calculate upper right corner
- lda x2
- sta x1
+ ; dy = y2 - y1 + 1
+ lda y2
+ sub y1
+ sta dy
+ inc dy
+ ; Calculate upper left corner
+ jsr CALC
+ ; Save the values
+ tya
+ add sptr
+ sta lmem
+ lda sptr + 1
+ adc #0
+ sta lmem + 1
+ lda bar_table,x
+ sta lmask
+ ; Calculate upper right corner
+ lda x2
+ sta x1
.if >(::x_res - 1) > 0
- lda x2 + 1
- sta x1 + 1
+ lda x2 + 1
+ sta x1 + 1
.endif
- jsr CALC
- ; Save the values
- tya
- add sptr
- sta sptr
- bcc skips
- inc sptr + 1
-skips: inx
- lda bar_table,x
- eor #$FF
- sta rmask
- ; Calculate memory difference between x1 and x2
- lda sptr
- sub lmem
- sta dx
-loop: ; Main loop
- ldy #0
- ldx dx
- beq same
- ; Left
- lda (lmem),y
- eor mask
- and lmask
- eor (lmem),y
- sta (lmem),y
- iny
- ; Between
- lda mask
- jmp next
-btwn: sta (lmem),y
- iny
-next: dex
- bne btwn
- ; Right
- lda (lmem),y
- eor mask
- and rmask
- eor (lmem),y
- sta (lmem),y
- jmp cont
-same: ; Same byte
- lda lmask
- and rmask
- sta fmask
- lda (lmem),y
- eor mask
- and fmask
- eor (lmem),y
- sta (lmem),y
-cont: ; Go to next row
- lda lmem
- add #<(x_res / ppb)
- sta lmem
- bcc skipm
- inc lmem + 1
-skipm: ; Loop while --dy > 0
- dec dy
- bne loop
-
- rts
+ jsr CALC
+ ; Save the values
+ tya
+ add sptr
+ sta sptr
+ bcc skips
+ inc sptr + 1
+skips: inx
+ lda bar_table,x
+ eor #$FF
+ sta rmask
+ ; Calculate memory difference between x1 and x2
+ lda sptr
+ sub lmem
+ sta dx
+loop: ; Main loop
+ ldy #0
+ ldx dx
+ beq same
+ ; Left
+ lda (lmem),y
+ eor mask
+ and lmask
+ eor (lmem),y
+ sta (lmem),y
+ iny
+ ; Between
+ lda mask
+ jmp next
+btwn: sta (lmem),y
+ iny
+next: dex
+ bne btwn
+ ; Right
+ lda (lmem),y
+ eor mask
+ and rmask
+ eor (lmem),y
+ sta (lmem),y
+ jmp cont
+same: ; Same byte
+ lda lmask
+ and rmask
+ sta fmask
+ lda (lmem),y
+ eor mask
+ and fmask
+ eor (lmem),y
+ sta (lmem),y
+cont: ; Go to next row
+ lda lmem
+ add #<(x_res / ppb)
+ sta lmem
+ bcc skipm
+ inc lmem + 1
+skipm: ; Loop while --dy > 0
+ dec dy
+ bne loop
+
+ rts
.endproc
.proc TEXTSTYLE
- ; ----------------------------------------------------------------------
- ;
- ; TEXTSTYLE: Set text style. Scale factors in X and Y and direction in A
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; TEXTSTYLE: Set text style. Scale factors in X and Y and direction in A
+ ;
+ ; ----------------------------------------------------------------------
.code
- stx mag_x
- sty mag_y
- ; Save text direction in bit 8 so that we can use BIT instruction later
- lsr a
- ror a
- sta text_dir
- ; Save 8 * scaling factors
- lda #0
- sta mag_x8 + 1
- sta mag_y8 + 1
- ; Save 8 * mag_x
- txa
-
- .repeat 3
- asl a
- rol mag_x8 + 1
- .endrepeat
-
- sta mag_x8
- ; Save 8 * mag_y
- tya
-
- .repeat 3
- asl a
- rol mag_y8 + 1
- .endrepeat
-
- sta mag_y8
- ; Done!
- rts
+ stx mag_x
+ sty mag_y
+ ; Save text direction in bit 8 so that we can use BIT instruction later
+ lsr a
+ ror a
+ sta text_dir
+ ; Save 8 * scaling factors
+ lda #0
+ sta mag_x8 + 1
+ sta mag_y8 + 1
+ ; Save 8 * mag_x
+ txa
+
+ .repeat 3
+ asl a
+ rol mag_x8 + 1
+ .endrepeat
+
+ sta mag_x8
+ ; Save 8 * mag_y
+ tya
+
+ .repeat 3
+ asl a
+ rol mag_y8 + 1
+ .endrepeat
+
+ sta mag_y8
+ ; Done!
+ rts
.endproc
; ******************************************************************************
.proc OUTTEXT
- ; ----------------------------------------------------------------------
- ;
- ; OUTTEXT: Draw text at x1, y1. String is in ptr3
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; OUTTEXT: Draw text at x1, y1. String is in ptr3
+ ;
+ ; ----------------------------------------------------------------------
; locals
- string := tmp1
- cols := tmp3
- pixels := tmp4
- font := regsave
+ string := tmp1
+ cols := tmp3
+ pixels := tmp4
+ font := regsave
.rodata
- ataint: .byte 64,0,32,96
+ ataint: .byte 64,0,32,96
.bss
- rows: .res 1
+ rows: .res 1
.if >(::x_res - 1) > 0
- oldx1: .res 2
- oldx2: .res 2
+ oldx1: .res 2
+ oldx2: .res 2
.else
- oldx1: .res 1
- oldx2: .res 1
+ oldx1: .res 1
+ oldx2: .res 1
.endif
- oldy1: .res 1
- oldy2: .res 1
- inv: .res 1
+ oldy1: .res 1
+ oldy2: .res 1
+ inv: .res 1
.code
- ; Don't draw zero sized characters
- lda mag_x
- ora mag_y
- bne not0
- rts
-
-not0: ; Save string address, ptr3 is needed by BAR
- lda ptr3
- sta string
- lda ptr3 + 1
- sta string + 1
-
- bit text_dir
- bmi vert
-
- ; Calculate x2
- lda mag_x
- sub #1
- add x1
- sta x2
+ ; Don't draw zero sized characters
+ lda mag_x
+ ora mag_y
+ bne not0
+ rts
+
+not0: ; Save string address, ptr3 is needed by BAR
+ lda ptr3
+ sta string
+ lda ptr3 + 1
+ sta string + 1
+
+ bit text_dir
+ bmi vert
+
+ ; Calculate x2
+ lda mag_x
+ sub #1
+ add x1
+ sta x2
.if >(::x_res - 1) > 0
- lda x1 + 1
- adc #0
- sta x2 + 1
+ lda x1 + 1
+ adc #0
+ sta x2 + 1
.else
- lda #0
- sta x2 + 1
+ lda #0
+ sta x2 + 1
.endif
- ; Calculate y2 and adjust y1
- dec y1
- lda y1
- sta y2
- sub mag_y
- add #1
- sta y1
- lda #0
- sta y2 + 1
-
- jmp while
-
- ; Calculate for vertical text
-vert: lda x1
- sub #1
- sta x2
- lda x1 + 1
- sbc #0
- sta x2 + 1
- lda x1
- sub mag_y
- sta x1
- lda x1 + 1
- sbc #0
- sta x1 + 1
-
- lda mag_x
- sub #1
- add y1
- sta y2
- lda #0
- sta y2 + 1
- jmp while
-
- ; Main loop
-loop: inc string
- bne skiph
- inc string + 1
-skiph: ; Save coords
- bit text_dir
- bmi scvert
-
- ldx y1
- stx oldy1
- ldx y2
- stx oldy2
- jmp draw
-
-scvert: ldx x1
- stx oldx1
- ldx x2
- stx oldx2
+ ; Calculate y2 and adjust y1
+ dec y1
+ lda y1
+ sta y2
+ sub mag_y
+ add #1
+ sta y1
+ lda #0
+ sta y2 + 1
+
+ jmp while
+
+ ; Calculate for vertical text
+vert: lda x1
+ sub #1
+ sta x2
+ lda x1 + 1
+ sbc #0
+ sta x2 + 1
+ lda x1
+ sub mag_y
+ sta x1
+ lda x1 + 1
+ sbc #0
+ sta x1 + 1
+
+ lda mag_x
+ sub #1
+ add y1
+ sta y2
+ lda #0
+ sta y2 + 1
+ jmp while
+
+ ; Main loop
+loop: inc string
+ bne skiph
+ inc string + 1
+skiph: ; Save coords
+ bit text_dir
+ bmi scvert
+
+ ldx y1
+ stx oldy1
+ ldx y2
+ stx oldy2
+ jmp draw
+
+scvert: ldx x1
+ stx oldx1
+ ldx x2
+ stx oldx2
.if >(::x_res - 1) > 0
- ldx x1 + 1
- stx oldx1 + 1
- ldx x2 + 1
- stx oldx2 + 1
+ ldx x1 + 1
+ stx oldx1 + 1
+ ldx x2 + 1
+ stx oldx2 + 1
.endif
- ; Draw one character
- ; Convert to ANTIC code
-draw: tay
- rol a
- rol a
- rol a
- rol a
- and #3
- tax
- tya
- and #$9f
- ora ataint,x
- ; Save and clear inverse video bit
- sta inv
- and #$7F
- ; Calculate font data address
- sta font
- lda #0
- sta font + 1
-
- .repeat 3
- asl font
- rol a
- .endrepeat
-
- adc CHBAS
- sta font + 1
- ; Save old coords
- bit text_dir
- bpl hor
- lda y1
- sta oldy1
- lda y2
- sta oldy2
- jmp cont
-hor: lda x1
- sta oldx1
- lda x2
- sta oldx2
+ ; Draw one character
+ ; Convert to ANTIC code
+draw: tay
+ rol a
+ rol a
+ rol a
+ rol a
+ and #3
+ tax
+ tya
+ and #$9f
+ ora ataint,x
+ ; Save and clear inverse video bit
+ sta inv
+ and #$7F
+ ; Calculate font data address
+ sta font
+ lda #0
+ sta font + 1
+
+ .repeat 3
+ asl font
+ rol a
+ .endrepeat
+
+ adc CHBAS
+ sta font + 1
+ ; Save old coords
+ bit text_dir
+ bpl hor
+ lda y1
+ sta oldy1
+ lda y2
+ sta oldy2
+ jmp cont
+hor: lda x1
+ sta oldx1
+ lda x2
+ sta oldx2
.if >(::x_res - 1) > 0
- lda x1 + 1
- sta oldx1 + 1
- lda x2 + 1
- sta oldx2 + 1
+ lda x1 + 1
+ sta oldx1 + 1
+ lda x2 + 1
+ sta oldx2 + 1
.endif
- ; Get glyph pixels
-cont: ldy #7
- ; Put one row of the glyph
-putrow: sty rows
- lda (font),y
- bit inv
- bpl noinv
- eor #$FF
-noinv: sta pixels
- lda #7
- sta cols
- ; Put one column of the row
-putcol: asl pixels
- bcc next_col
- lda x1
- pha
- lda x1 + 1
- pha
- jsr clipped_bar
- pla
- sta x1 + 1
- pla
- sta x1
+ ; Get glyph pixels
+cont: ldy #7
+ ; Put one row of the glyph
+putrow: sty rows
+ lda (font),y
+ bit inv
+ bpl noinv
+ eor #$FF
+noinv: sta pixels
+ lda #7
+ sta cols
+ ; Put one column of the row
+putcol: asl pixels
+ bcc next_col
+ lda x1
+ pha
+ lda x1 + 1
+ pha
+ jsr clipped_bar
+ pla
+ sta x1 + 1
+ pla
+ sta x1
next_col:
- ; Go to next column
- ; increase x coords
- bit text_dir
- bmi vertinc
-
- lda mag_x
- add x1
- sta x1
- bcc L1
- inc x1 + 1
-L1: lda mag_x
- add x2
- sta x2
- bcc L2
- inc x2 + 1
- jmp L2
+ ; Go to next column
+ ; increase x coords
+ bit text_dir
+ bmi vertinc
+
+ lda mag_x
+ add x1
+ sta x1
+ bcc L1
+ inc x1 + 1
+L1: lda mag_x
+ add x2
+ sta x2
+ bcc L2
+ inc x2 + 1
+ jmp L2
vertinc:
- lda y1
- sub mag_x
- sta y1
- lda y2
- sub mag_x
- sta y2
+ lda y1
+ sub mag_x
+ sta y1
+ lda y2
+ sub mag_x
+ sta y2
L2:
- dec cols
- bpl putcol
+ dec cols
+ bpl putcol
next_row:
- ; Go to next row
- bit text_dir
- bmi verty
-
- lda y1
- sub mag_y
- sta y1
- bcs L3
- dec y1 + 1
-L3: lda y2
- sub mag_y
- sta y2
- bcs L6
- dec y2 + 1
-L4: jmp L6
-
-verty: lda x1
- sub mag_y
- sta x1
- bcs L5
- dec x1 + 1
-L5: lda x2
- sub mag_y
- sta x2
- bcs L6
- dec x2 + 1
+ ; Go to next row
+ bit text_dir
+ bmi verty
+
+ lda y1
+ sub mag_y
+ sta y1
+ bcs L3
+ dec y1 + 1
+L3: lda y2
+ sub mag_y
+ sta y2
+ bcs L6
+ dec y2 + 1
+L4: jmp L6
+
+verty: lda x1
+ sub mag_y
+ sta x1
+ bcs L5
+ dec x1 + 1
+L5: lda x2
+ sub mag_y
+ sta x2
+ bcs L6
+ dec x2 + 1
L6:
- ; Restore old values
- bit text_dir
- bpl reshor
- lda oldy1
- sta y1
- lda oldy2
- sta y2
- jmp nextrow
-reshor: lda oldx1
- sta x1
- lda oldx2
- sta x2
+ ; Restore old values
+ bit text_dir
+ bpl reshor
+ lda oldy1
+ sta y1
+ lda oldy2
+ sta y2
+ jmp nextrow
+reshor: lda oldx1
+ sta x1
+ lda oldx2
+ sta x2
.if >(::x_res - 1) > 0
- lda oldx1 + 1
- sta x1 + 1
- lda oldx2 + 1
- sta x2 + 1
+ lda oldx1 + 1
+ sta x1 + 1
+ lda oldx2 + 1
+ sta x2 + 1
.endif
- ; Next row
+ ; Next row
nextrow:
- ldy rows
- dey
- jpl putrow
-
- ; Restore coords
- bit text_dir
- bmi resvert
-
- ldx oldy1
- stx y1
- ldx oldy2
- stx y2
- ldx #0
- stx y1 + 1
- stx y2 + 1
-
- lda mag_x8
- add x1
- sta x1
- lda mag_x8 + 1
- adc x1 + 1
- sta x1 + 1
- lda mag_x8
- add x2
- sta x2
- lda mag_x8 + 1
- adc x2 + 1
- sta x2 + 1
-
- jmp while
+ ldy rows
+ dey
+ jpl putrow
+
+ ; Restore coords
+ bit text_dir
+ bmi resvert
+
+ ldx oldy1
+ stx y1
+ ldx oldy2
+ stx y2
+ ldx #0
+ stx y1 + 1
+ stx y2 + 1
+
+ lda mag_x8
+ add x1
+ sta x1
+ lda mag_x8 + 1
+ adc x1 + 1
+ sta x1 + 1
+ lda mag_x8
+ add x2
+ sta x2
+ lda mag_x8 + 1
+ adc x2 + 1
+ sta x2 + 1
+
+ jmp while
resvert:
- ldx oldx1
- stx x1
- ldx oldx2
- stx x2
+ ldx oldx1
+ stx x1
+ ldx oldx2
+ stx x2
.if >(::x_res - 1) > 0
- ldx oldx1 + 1
- stx x1 + 1
- ldx oldx2 + 1
- stx x2 + 1
+ ldx oldx1 + 1
+ stx x1 + 1
+ ldx oldx2 + 1
+ stx x2 + 1
.endif
- lda y1
- sub mag_x8
- sta y1
- lda y1 +1
- sbc mag_x8 + 1
- sta y1 + 1
- lda y2
- sub mag_x8
- sta y2
- lda y2 +1
- sbc mag_x8 + 1
- sta y2 + 1
-
- ; End of loop
-while: ldy #0
- lda (string),y
- jne loop ; Check for null character
- rts
+ lda y1
+ sub mag_x8
+ sta y1
+ lda y1 +1
+ sbc mag_x8 + 1
+ sta y1 + 1
+ lda y2
+ sub mag_x8
+ sta y2
+ lda y2 +1
+ sbc mag_x8 + 1
+ sta y2 + 1
+
+ ; End of loop
+while: ldy #0
+ lda (string),y
+ jne loop ; Check for null character
+ rts
.endproc
.proc SETVIEWPAGE
- ; ----------------------------------------------------------------------
- ;
- ; SETVIEWPAGE, page in A
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; SETVIEWPAGE, page in A
+ ;
+ ; ----------------------------------------------------------------------
.code
- tax
- beq cont
- lda #32
+ tax
+ beq cont
+ lda #32
-cont: add p0dls
- cmp SDLSTH
- beq done ; We're already in the desired page
+cont: add p0dls
+ cmp SDLSTH
+ beq done ; We're already in the desired page
- ldx RTCLOK + 2
- sta SDLSTH
+ ldx RTCLOK + 2
+ sta SDLSTH
- ; Wait until next VBLANK
-wait: cpx RTCLOK + 2
- beq wait
+ ; Wait until next VBLANK
+wait: cpx RTCLOK + 2
+ beq wait
- ; Done
-done: rts
+ ; Done
+done: rts
.endproc
; ******************************************************************************
.proc SETDRAWPAGE
- ; ----------------------------------------------------------------------
- ;
- ; SETDRAWPAGE, page in A
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; SETDRAWPAGE, page in A
+ ;
+ ; ----------------------------------------------------------------------
.code
- tax
- beq cont
- lda #32
-cont: add p0scr
- sta SAVMSC + 1
- rts
+ tax
+ beq cont
+ lda #32
+cont: add p0scr
+ sta SAVMSC + 1
+ rts
.endproc
.endif
; ******************************************************************************
- ; ----------------------------------------------------------------------
- ;
- ; Unimplemented functions that require an error code
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; Unimplemented functions that require an error code
+ ;
+ ; ----------------------------------------------------------------------
CONTROL:
- lda #TGI_ERR_INV_FUNC
- sta error
- ; fall through
+ lda #TGI_ERR_INV_FUNC
+ sta error
+ ; fall through
; ******************************************************************************
- ; ----------------------------------------------------------------------
- ;
- ; Unimplemented functions that don't require an error code
- ;
- ; ----------------------------------------------------------------------
+ ; ----------------------------------------------------------------------
+ ;
+ ; Unimplemented functions that don't require an error code
+ ;
+ ; ----------------------------------------------------------------------
INSTALL:
UNINSTALL:
projects / cc65 / blobdiff