mirror of
https://github.com/cc65/cc65.git
synced 2024-12-27 00:29:31 +00:00
80 lines
1.7 KiB
ArmAsm
80 lines
1.7 KiB
ArmAsm
;
|
|
; Graphics driver for the 80x192x9 (CIO mode 10, ANTIC mode F, GTIA mode $80) on the Atari.
|
|
;
|
|
; Fatih Aygun (2009)
|
|
;
|
|
|
|
.include "atari.inc"
|
|
.include "zeropage.inc"
|
|
|
|
.include "tgi-kernel.inc"
|
|
.include "tgi-error.inc"
|
|
|
|
.macpack generic
|
|
|
|
; ******************************************************************************
|
|
|
|
; ----------------------------------------------------------------------
|
|
;
|
|
; Constants and tables
|
|
;
|
|
; ----------------------------------------------------------------------
|
|
|
|
; Graphics mode
|
|
grmode = 10
|
|
; X resolution
|
|
x_res = 80
|
|
; Y resolution
|
|
y_res = 192
|
|
; Number of colors
|
|
colors = 9
|
|
; Pixels per byte
|
|
ppb = 2
|
|
; Screen memory size in bytes
|
|
scrsize = x_res * y_res / ppb
|
|
; Pixel aspect ratio
|
|
aspect = $0330 ; based on 4/3 display
|
|
; Free memory needed
|
|
mem_needed = 7147
|
|
; Number of screen pages
|
|
pages = 1
|
|
|
|
.rodata
|
|
mask_table: ; Mask table to set pixels
|
|
.byte %11110000, %00001111
|
|
masks: ; Color masks
|
|
.byte $00, $11, $22, $33, $44, $55, $66, $77, $88
|
|
bar_table: ; Mask table for BAR
|
|
.byte %11111111, %00001111, %00000000
|
|
default_palette:
|
|
.byte $00, $0E, $32, $96, $68, $C4, $74, $EE, $4A
|
|
|
|
.code
|
|
|
|
; ******************************************************************************
|
|
|
|
.proc SETPALETTE
|
|
|
|
; ----------------------------------------------------------------------
|
|
;
|
|
; SETPALETTE: Set the palette (in ptr1)
|
|
;
|
|
; ----------------------------------------------------------------------
|
|
|
|
.code
|
|
; Copy the palette
|
|
ldy #colors - 1
|
|
loop: lda (ptr1),y
|
|
sta palette,y
|
|
sta PCOLR0,y
|
|
dey
|
|
bpl loop
|
|
|
|
; Done, reset the error code
|
|
lda #TGI_ERR_OK
|
|
sta error
|
|
rts
|
|
.endproc
|
|
|
|
.include "atari_tgi_common.inc"
|