; Oliver Schmidt <ol.sc@web.de>
;
- .include "zeropage.inc"
+ .include "zeropage.inc"
- .include "tgi-kernel.inc"
- .include "tgi-error.inc"
- .include "apple2.inc"
+ .include "tgi-kernel.inc"
+ .include "tgi-error.inc"
+ .include "apple2.inc"
+
+ .macpack module
; ------------------------------------------------------------------------
; Zero page stuff
-HBASL := $26
-HMASK := $30
-PAGE := $E6
-SCALE := $E7
-ROT := $F9
+HBASL := $26
+HMASK := $30
+PAGE := $E6
+SCALE := $E7
+ROT := $F9
; Graphics entry points, by cbmnut (applenut??) cbmnut@hushmail.com
-TEXT := $F399 ; Return to text screen
-HGR2 := $F3D8 ; Initialize and clear hi-res page 2.
-HGR := $F3E2 ; Initialize and clear hi-res page 1.
-HCLR := $F3F2 ; Clear the current hi-res screen to black.
-BKGND := $F3F6 ; Clear the current hi-res screen to the
+TEXT := $F399 ; Return to text screen
+HGR2 := $F3D8 ; Initialize and clear hi-res page 2.
+HGR := $F3E2 ; Initialize and clear hi-res page 1.
+HCLR := $F3F2 ; Clear the current hi-res screen to black.
+BKGND := $F3F6 ; Clear the current hi-res screen to the
; last plotted color (from ($1C).
-HPOSN := $F411 ; Positions the hi-res cursor without
+HPOSN := $F411 ; Positions the hi-res cursor without
; plotting a point.
; Enter with (A) = Y-coordinate, and
; (Y,X) = X-coordinate.
-HPLOT := $F457 ; Calls HPOSN and tries to plot a dot at
+HPLOT := $F457 ; Calls HPOSN and tries to plot a dot at
; the cursor's position. If you are
; trying to plot a non-white color at
; a complementary color position, no
; dot will be plotted.
-HLIN := $F53A ; Draws a line from the last plotted
+HLIN := $F53A ; Draws a line from the last plotted
; point or line destination to:
; (X,A) = X-coordinate, and
; (Y) = Y-coordinate.
-HFIND := $F5CB ; Converts the hi-res coursor's position
+HFIND := $F5CB ; Converts the hi-res coursor's position
; back to X- and Y-coordinates; stores
; X-coordinate at $E0,E1 and Y-coordinate
; at $E2.
-DRAW := $F601 ; Draws a shape. Enter with (Y,X) = the
+DRAW := $F601 ; Draws a shape. Enter with (Y,X) = the
; address of the shape table, and (A) =
; the rotation factor. Uses the current
; color.
-XDRAW := $F65D ; Draws a shape by inverting the existing
+XDRAW := $F65D ; Draws a shape by inverting the existing
; color of the dots the shape draws over.
; Same entry parameters as DRAW.
-SETHCOL := $F6EC ; Set the hi-res color to (X), where (X)
+SETHCOL := $F6EC ; Set the hi-res color to (X), where (X)
; must be between 0 and 7.
; ------------------------------------------------------------------------
; Variables mapped to the zero page segment variables. Some of these are
; used for passing parameters to the driver.
-X1 := ptr1
-Y1 := ptr2
-X2 := ptr3
-Y2 := ptr4
+X1 := ptr1
+Y1 := ptr2
+X2 := ptr3
+Y2 := ptr4
; ------------------------------------------------------------------------
- .segment "JUMPTABLE"
+ .ifdef __APPLE2ENH__
+ module_header _a2e_hi_tgi
+ .else
+ module_header _a2_hi_tgi
+ .endif
; Header. Includes jump table and constants.
; First part of the header is a structure that has a magic and defines the
; capabilities of the driver
- .byte $74, $67, $69 ; "tgi"
- .byte TGI_API_VERSION ; TGI API version number
- .word 280 ; X resolution
- .word 192 ; Y resolution
- .byte 8 ; Number of drawing colors
-pages: .byte 2 ; Number of screens available
- .byte 7 ; System font X size
- .byte 8 ; System font Y size
- .word $00EA ; Aspect ratio (based on 4/3 display)
+ .byte $74, $67, $69 ; "tgi"
+ .byte TGI_API_VERSION ; TGI API version number
+ .addr $0000 ; Library reference
+ .word 280 ; X resolution
+ .word 192 ; Y resolution
+ .byte 8 ; Number of drawing colors
+pages: .byte 2 ; Number of screens available
+ .byte 7 ; System font X size
+ .byte 8 ; System font Y size
+ .word $00EA ; Aspect ratio (based on 4/3 display)
.byte 0 ; TGI driver flags
; Next comes the jump table. With the exception of IRQ, all entries must be
; valid and may point to an RTS for test versions (function not implemented).
- .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
; ------------------------------------------------------------------------
- .bss
+ .bss
; Absolute variables used in the code
-ERROR: .res 1 ; Error code
+ERROR: .res 1 ; Error code
; ------------------------------------------------------------------------
- .rodata
+ .rodata
; Constants and tables
DEFPALETTE: .byte $00, $01, $02, $03, $04, $05, $06, $07
FONT:
- ; Beagle Bros Shape Mechanic font F.ASCII.SMALL
- ; modified to exactly reproduce the text glyphs
- .incbin "a2.hi.fnt"
+ ; Beagle Bros Shape Mechanic font F.ASCII.SMALL
+ ; modified to exactly reproduce the text glyphs
+ .incbin "a2.hi.fnt"
; ------------------------------------------------------------------------
- .code
+ .code
; INSTALL routine. Is called after the driver is loaded into memory. May
; initialize anything that has to be done just once. Is probably empty
; most of the time.
; Must set an error code: NO
INSTALL:
- .ifdef __APPLE2ENH__
- ; No page switching if 80 column store is enabled
- bit RD80COL
- bpl :+
- lda #$01
- sta pages
-: .endif
+ .ifdef __APPLE2ENH__
+ ; No page switching if 80 column store is enabled
+ bit RD80COL
+ bpl :+
+ lda #$01
+ sta pages
+: .endif
- ; Fall through
+ ; Fall through
; UNINSTALL routine. Is called before the driver is removed from memory. May
; clean up anything done by INSTALL but is probably empty most of the time.
; Must set an error code: NO
UNINSTALL:
- rts
+ rts
; INIT: Changes an already installed device from text mode to graphics mode.
; Note that INIT/DONE may be called multiple times while the driver
; active, so there is no need to protect against that.
; Must set an error code: YES
INIT:
- ; Switch into graphics mode
- bit MIXCLR
- bit HIRES
- bit TXTCLR
+ ; Switch into graphics mode
+ bit MIXCLR
+ bit HIRES
+ bit TXTCLR
- ; Beagle Bros Shape Mechanic fonts don't
- ; scale well so use fixed scaling factor
- lda #$01
- sta SCALE
+ ; Beagle Bros Shape Mechanic fonts don't
+ ; scale well so use fixed scaling factor
+ lda #$01
+ sta SCALE
- ; Done, reset the error code
- lda #TGI_ERR_OK
- sta ERROR
- rts
+ ; Done, reset the error code
+ lda #TGI_ERR_OK
+ sta ERROR
+ rts
; DONE: Will be called to switch the graphics device back into text mode.
; The graphics kernel will never call DONE when no graphics mode is active,
; so there is no need to protect against that.
; Must set an error code: NO
DONE:
- ; Switch into text mode
- bit TXTSET
- bit LOWSCR
+ ; Switch into text mode
+ bit TXTSET
+ bit LOWSCR
- .ifdef __APPLE2ENH__
- ; Limit SET80COL-HISCR to text
- bit LORES
- .endif
+ .ifdef __APPLE2ENH__
+ ; Limit SET80COL-HISCR to text
+ bit LORES
+ .endif
- ; Reset the text window top
- lda #$00
- sta WNDTOP
- rts
+ ; Reset the text window top
+ lda #$00
+ sta WNDTOP
+ rts
; GETERROR: Return the error code in A and clear it.
GETERROR:
- lda ERROR
- ldx #TGI_ERR_OK
- stx ERROR
- rts
+ lda ERROR
+ ldx #TGI_ERR_OK
+ stx ERROR
+ rts
; CONTROL: Platform/driver specific entry point.
; Must set an error code: YES
CONTROL:
- ; Check data msb and code to be 0
- ora ptr1+1
- bne err
-
- ; Check data lsb to be [0..1]
- lda ptr1
- cmp #1+1
- bcs err
-
- ; Set text window top
- tax
- beq :+
- lda #20
-: sta WNDTOP
-
- ; Switch 4 lines of text
- .assert MIXCLR + 1 = MIXSET, error
- lda MIXCLR,x ; No BIT absolute,X available
-
- ; Done, reset the error code
- lda #TGI_ERR_OK
- beq :+ ; Branch always
-
- ; Done, set the error code
-err: lda #TGI_ERR_INV_ARG
-: sta ERROR
- rts
+ ; Check data msb and code to be 0
+ ora ptr1+1
+ bne err
+
+ ; Check data lsb to be [0..1]
+ lda ptr1
+ cmp #1+1
+ bcs err
+
+ ; Set text window top
+ tax
+ beq :+
+ lda #20
+: sta WNDTOP
+
+ ; Switch 4 lines of text
+ .assert MIXCLR + 1 = MIXSET, error
+ lda MIXCLR,x ; No BIT absolute,X available
+
+ ; Done, reset the error code
+ lda #TGI_ERR_OK
+ beq :+ ; Branch always
+
+ ; Done, set the error code
+err: lda #TGI_ERR_INV_ARG
+: sta ERROR
+ rts
; CLEAR: Clears the screen.
; Must set an error code: NO
CLEAR:
- bit $C082 ; Switch in ROM
- jsr HCLR
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ jsr HCLR
+ bit $C080 ; Switch in LC bank 2 for R/O
+ rts
; SETVIEWPAGE: Set the visible page. Called with the new page in A (0..n).
; The page number is already checked to be valid by the graphics kernel.
; Must set an error code: NO (will only be called if page ok)
SETVIEWPAGE:
- tax
- .assert LOWSCR + 1 = HISCR, error
- lda LOWSCR,x ; No BIT absolute,X available
- rts
+ tax
+ .assert LOWSCR + 1 = HISCR, error
+ lda LOWSCR,x ; No BIT absolute,X available
+ rts
; SETDRAWPAGE: Set the drawable page. Called with the new page in A (0..n).
; The page number is already checked to be valid by the graphics kernel.
; Must set an error code: NO (will only be called if page ok)
SETDRAWPAGE:
- tax
- beq :+
- lda #>$4000 ; Page 2
- .byte $2C ; BIT absolute
-: lda #>$2000 ; Page 1
- sta PAGE
- rts
+ tax
+ beq :+
+ lda #>$4000 ; Page 2
+ .byte $2C ; BIT absolute
+: lda #>$2000 ; Page 1
+ sta PAGE
+ rts
; SETCOLOR: Set the drawing color (in A). The new color is already checked
; to be in a valid range (0..maxcolor-1).
; Must set an error code: NO (will only be called if color ok)
SETCOLOR:
- bit $C082 ; Switch in ROM
- tax
- jsr SETHCOL
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ tax
+ jsr SETHCOL
+ bit $C080 ; Switch in LC bank 2 for R/O
+ rts
; SETPALETTE: Set the palette (not available with all drivers/hardware).
; A pointer to the palette is passed in ptr1. Must set an error if palettes
; are not supported
; Must set an error code: YES
SETPALETTE:
- lda #TGI_ERR_INV_FUNC
- sta ERROR
- rts
+ lda #TGI_ERR_INV_FUNC
+ sta ERROR
+ rts
; GETPALETTE: Return the current palette in A/X. Even drivers that cannot
; set the palette should return the default palette here, so there's no
; way for this function to fail.
; Must set an error code: NO
GETPALETTE:
- ; Fall through
+ ; Fall through
; GETDEFPALETTE: Return the default palette for the driver in A/X. All
; drivers should return something reasonable here, even drivers that don't
; of the (not changeable) palette.
; Must set an error code: NO (all drivers must have a default palette)
GETDEFPALETTE:
- lda #<DEFPALETTE
- ldx #>DEFPALETTE
- rts
+ lda #<DEFPALETTE
+ ldx #>DEFPALETTE
+ rts
; SETPIXEL: Draw one pixel at X1/Y1 = ptr1/ptr2 with the current drawing
; color. The coordinates passed to this function are never outside the
; visible screen area, so there is no need for clipping inside this function.
; Must set an error code: NO
SETPIXEL:
- bit $C082 ; Switch in ROM
- ldx X1
- ldy X1+1
- lda Y1
- jsr HPLOT
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ ldx X1
+ ldy X1+1
+ lda Y1
+ jsr HPLOT
+ bit $C080 ; Switch in LC bank 2 for R/O
+ rts
; GETPIXEL: Read the color value of a pixel and return it in A/X. The
; coordinates passed to this function are never outside the visible screen
; area, so there is no need for clipping inside this function.
GETPIXEL:
- bit $C082 ; Switch in ROM
- ldx X1
- ldy X1+1
- lda Y1
- jsr HPOSN
- lda (HBASL),y
- and HMASK
- asl
- beq :+ ; 0 (black)
- lda #$03 ; 3 (white)
-: bcc :+
- adc #$03 ; += 4 (black -> black2, white -> white2)
-: ldx #$00
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ ldx X1
+ ldy X1+1
+ lda Y1
+ jsr HPOSN
+ lda (HBASL),y
+ and HMASK
+ asl
+ beq :+ ; 0 (black)
+ lda #$03 ; 3 (white)
+: bcc :+
+ adc #$03 ; += 4 (black -> black2, white -> white2)
+: ldx #$00
+ bit $C080 ; Switch in LC bank 2 for R/O
+ rts
; LINE: Draw a line from X1/Y1 to X2/Y2, where X1/Y1 = ptr1/ptr2 and
; X2/Y2 = ptr3/ptr4 using the current drawing color.
; Must set an error code: NO
LINE:
- bit $C082 ; Switch in ROM
- ldx X1
- ldy X1+1
- lda Y1
- jsr HPOSN
- lda X2
- ldx X2+1
- ldy Y2
- jsr HLIN
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ ldx X1
+ ldy X1+1
+ lda Y1
+ jsr HPOSN
+ lda X2
+ ldx X2+1
+ ldy Y2
+ jsr HLIN
+ bit $C080 ; Switch in LC bank 2 for R/O
+ rts
; BAR: Draw a filled rectangle with the corners X1/Y1, X2/Y2, where
; X1/Y1 = ptr1/ptr2 and X2/Y2 = ptr3/ptr4 using the current drawing color.
; Contrary to most other functions, the graphics kernel will sort and clip
; the coordinates before calling the driver, so on entry the following
; conditions are valid:
-; X1 <= X2
-; Y1 <= Y2
-; (X1 >= 0) && (X1 < XRES)
-; (X2 >= 0) && (X2 < XRES)
-; (Y1 >= 0) && (Y1 < YRES)
-; (Y2 >= 0) && (Y2 < YRES)
+; X1 <= X2
+; Y1 <= Y2
+; (X1 >= 0) && (X1 < XRES)
+; (X2 >= 0) && (X2 < XRES)
+; (Y1 >= 0) && (Y1 < YRES)
+; (Y2 >= 0) && (Y2 < YRES)
; Must set an error code: NO
BAR:
- inc Y2
-: lda Y2
- pha
- lda Y1
- sta Y2
- jsr LINE
- pla
- sta Y2
- inc Y1
- cmp Y1
- bne :-
- rts
+ inc Y2
+: lda Y2
+ pha
+ lda Y1
+ sta Y2
+ jsr LINE
+ pla
+ sta Y2
+ inc Y1
+ cmp Y1
+ bne :-
+ rts
; TEXTSTYLE: Set the style used when calling OUTTEXT. Text scaling in X and Y
; direction is passend in X/Y, the text direction is passed in A.
; Must set an error code: NO
TEXTSTYLE:
- cmp #TGI_TEXT_VERTICAL
- bne :+
- lda #48
-: sta ROT
- rts
+ cmp #TGI_TEXT_VERTICAL
+ bne :+
+ lda #48
+: sta ROT
+ rts
; OUTTEXT: Output text at X/Y = ptr1/ptr2 using the current color and the
; current text style. The text to output is given as a zero terminated
; string with address in ptr3.
; Must set an error code: NO
OUTTEXT:
- bit $C082 ; Switch in ROM
- lda X1
- ldy X1+1
- ldx ROT
- php ; Save Z flag
- beq :+ ; Not horizontal
- sec
- sbc #$07 ; Adjust X
- bcs :+
- dey
-: tax
- lda Y1
- plp ; Restore Z flag
- bne :+ ; Not vertical
- sec
- sbc #$07 ; Adjust Y
-: jsr HPOSN
- clc
- lda FONT+2*99 ; "connection char"
- adc #<FONT
- sta ptr4
- lda FONT+2*99+1 ; "connection char"
- adc #>FONT
- sta ptr4+1
- ldy #$00
-: lda (ptr3),y
- beq :+
- sty tmp1 ; Save string index
- sec
- sbc #$1F ; No control chars
- asl ; Offset * 2
- tay
- clc
- lda FONT,y
- adc #<FONT
- tax
- lda FONT+1,y
- adc #>FONT
- tay
- lda ROT
- jsr DRAW ; Draw char from string
- ldx ptr4
- ldy ptr4+1
- lda ROT
- jsr DRAW ; Draw "connection char"
- ldy tmp1 ; Restore string index
- iny
- bne :- ; Branch always
-: bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ lda X1
+ ldy X1+1
+ ldx ROT
+ php ; Save Z flag
+ beq :+ ; Not horizontal
+ sec
+ sbc #$07 ; Adjust X
+ bcs :+
+ dey
+: tax
+ lda Y1
+ plp ; Restore Z flag
+ bne :+ ; Not vertical
+ sec
+ sbc #$07 ; Adjust Y
+: jsr HPOSN
+ clc
+ lda FONT+2*99 ; "connection char"
+ adc #<FONT
+ sta ptr4
+ lda FONT+2*99+1 ; "connection char"
+ adc #>FONT
+ sta ptr4+1
+ ldy #$00
+: lda (ptr3),y
+ beq :+
+ sty tmp1 ; Save string index
+ sec
+ sbc #$1F ; No control chars
+ asl ; Offset * 2
+ tay
+ clc
+ lda FONT,y
+ adc #<FONT
+ tax
+ lda FONT+1,y
+ adc #>FONT
+ tay
+ lda ROT
+ jsr DRAW ; Draw char from string
+ ldx ptr4
+ ldy ptr4+1
+ lda ROT
+ jsr DRAW ; Draw "connection char"
+ ldy tmp1 ; Restore string index
+ iny
+ bne :- ; Branch always
+: bit $C080 ; Switch in LC bank 2 for R/O
+ rts
projects / cc65 / blobdiff