; 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
-H2 := $2C
-COLOR := $30
+H2 := $2C
+COLOR := $30
; ROM entry points
-TEXT := $F399
-PLOT := $F800
-HLINE := $F819
-CLRSC2 := $F838
-SETCOL := $F864
-SCRN := $F871
-SETGR := $FB40
-HOME := $FC58
+TEXT := $F399
+PLOT := $F800
+HLINE := $F819
+CLRSC2 := $F838
+SETCOL := $F864
+SCRN := $F871
+SETGR := $FB40
+HOME := $FC58
; 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_lo_tgi
+ .else
+ module_header _a2_lo_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 40 ; X resolution
- .word 48 ; Y resolution
- .byte 16 ; Number of drawing colors
- .byte 1 ; Number of screens available
- .byte 8 ; System font X size
- .byte 8 ; System font Y size
- .word $0198 ; 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 40 ; X resolution
+ .word 48 ; Y resolution
+ .byte 16 ; Number of drawing colors
+ .byte 1 ; Number of screens available
+ .byte 0 ; System font X size
+ .byte 0 ; System font Y size
+ .word $0198 ; 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
-ERROR: .res 1 ; Error code
-MIX: .res 1 ; 4 lines of text
+ERROR: .res 1 ; Error code
+MIX: .res 1 ; 4 lines of text
; ------------------------------------------------------------------------
- .rodata
+ .rodata
DEFPALETTE: .byte $00, $01, $02, $03, $04, $05, $06, $07
- .byte $08, $09, $0A, $0B, $0C, $0D, $0E, $0F
+ .byte $08, $09, $0A, $0B, $0C, $0D, $0E, $0F
TGI2COL: .byte $00, $0C, $03, $0F, $01, $09, $06, $02
- .byte $04, $05, $07, $08, $0A, $0B, $0D, $0E
+ .byte $04, $05, $07, $08, $0A, $0B, $0D, $0E
COL2TGI: .byte $00, $04, $07, $02, $08, $09, $06, $0A
- .byte $0B, $05, $0C, $0D, $01, $0E, $0F, $03
+ .byte $0B, $05, $0C, $0D, $01, $0E, $0F, $03
-MAXY: .byte 47, 39
+MAXY: .byte 47, 39
; ------------------------------------------------------------------------
- .code
+ .code
; 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 $C082 ; Switch in ROM
- jsr SETGR
- bit MIXCLR
- bit $C080 ; Switch in LC bank 2 for R/O
+ ; Switch into graphics mode
+ bit $C082 ; Switch in ROM
+ jsr SETGR
+ bit MIXCLR
+ bit $C080 ; Switch in LC bank 2 for R/O
- ; Done, reset the error code
- lda #TGI_ERR_OK
- sta ERROR
- sta MIX
+ ; Done, reset the error code
+ lda #TGI_ERR_OK
+ sta ERROR
+ sta MIX
- ; Fall through
+ ; Fall through
; 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:
- ; 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:
- ; Fall through
+ ; Fall through
; 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:
- ; Fall through
+ ; Fall through
; 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:
- ; Fall through
+ ; Fall through
; 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:
- ; Fall through
+ ; Fall through
; 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:
- rts
+ 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:
- bit $C082 ; Switch in ROM
- jsr TEXT
- jsr HOME
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ jsr TEXT
+ jsr HOME
+ bit $C080 ; Switch in LC bank 2 for R/O
+ 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
; CLEAR: Clears the screen.
; Must set an error code: NO
CLEAR:
- bit $C082 ; Switch in ROM
- lda COLOR ; Save current drawing color
- pha
- ldx MIX
- ldy MAXY,x ; Max Y depends on 4 lines of text
- jsr CLRSC2
- pla
- sta COLOR ; Restore current drawing color
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ lda COLOR ; Save current drawing color
+ pha
+ ldx MIX
+ ldy MAXY,x ; Max Y depends on 4 lines of text
+ jsr CLRSC2
+ pla
+ sta COLOR ; Restore current drawing color
+ bit $C080 ; Switch in LC bank 2 for R/O
+ 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
- lda TGI2COL,x
- jsr SETCOL
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ tax
+ lda TGI2COL,x
+ jsr SETCOL
+ bit $C080 ; Switch in LC bank 2 for R/O
+ 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
- bit $C082 ; Switch in ROM
-
- ; Switch 4 lines of text
- tax
- .assert MIXCLR + 1 = MIXSET, error
- lda MIXCLR,x ; No BIT absolute,X available
-
- ; Save current switch setting
- txa
- sta MIX
- bne text
-
- ; Clear 8 lines of graphics
- lda COLOR ; Save current drawing color
- pha
- lda #39 ; Rightmost column
- sta H2
- ldx #40 ; First line
-: txa
- ldy #$00 ; Leftmost column
- sty COLOR ; Black
- jsr HLINE ; Preserves X
- inx
- cpx #47+1 ; Last line
- bcc :-
- pla
- sta COLOR ; Restore current drawing color
- bcs :+ ; Branch always
-
- ; Clear 4 lines of text
-text: jsr HOME
-: bit $C080 ; Switch in LC bank 2 for R/O
-
- ; 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
+ bit $C082 ; Switch in ROM
+
+ ; Switch 4 lines of text
+ tax
+ .assert MIXCLR + 1 = MIXSET, error
+ lda MIXCLR,x ; No BIT absolute,X available
+
+ ; Save current switch setting
+ txa
+ sta MIX
+ bne text
+
+ ; Clear 8 lines of graphics
+ lda COLOR ; Save current drawing color
+ pha
+ lda #39 ; Rightmost column
+ sta H2
+ ldx #40 ; First line
+: txa
+ ldy #$00 ; Leftmost column
+ sty COLOR ; Black
+ jsr HLINE ; Preserves X
+ inx
+ cpx #47+1 ; Last line
+ bcc :-
+ pla
+ sta COLOR ; Restore current drawing color
+ bcs :+ ; Branch always
+
+ ; Clear 4 lines of text
+text: jsr HOME
+: bit $C080 ; Switch in LC bank 2 for R/O
+
+ ; 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
; 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
- ldy X1
- lda Y1
- jsr PLOT
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ ldy X1
+ lda Y1
+ jsr PLOT
+ 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
- ldy X1
- lda Y1
- jsr SCRN
- tax
- lda COL2TGI,x
- ldx #$00
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ ldy X1
+ lda Y1
+ jsr SCRN
+ tax
+ lda COL2TGI,x
+ ldx #$00
+ 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:
- bit $C082 ; Switch in ROM
- lda X2
- sta H2
- inc Y2
- ldx Y1
-: txa
- ldy X1
- jsr HLINE ; Preserves X
- inx
- cpx Y2
- bcc :-
- bit $C080 ; Switch in LC bank 2 for R/O
- rts
+ bit $C082 ; Switch in ROM
+ lda X2
+ sta H2
+ inc Y2
+ ldx Y1
+: txa
+ ldy X1
+ jsr HLINE ; Preserves X
+ inx
+ cpx Y2
+ bcc :-
+ bit $C080 ; Switch in LC bank 2 for R/O
+ rts
; ------------------------------------------------------------------------
-.include "../../tgi/tgidrv_line.inc"
+.include "../../tgi/tgidrv_line.inc"
projects / cc65 / blobdiff