mirror of
https://github.com/cc65/cc65.git
synced 2024-08-29 09:29:19 +00:00
86 lines
1.9 KiB
ArmAsm
86 lines
1.9 KiB
ArmAsm
|
;
|
||
|
; Graphics driver for the 160x96x2 (CIO mode 6, ANTIC mode B) on the Atari.
|
||
|
;
|
||
|
; Fatih Aygun (2009)
|
||
|
;
|
||
|
|
||
|
.include "atari.inc"
|
||
|
.include "zeropage.inc"
|
||
|
|
||
|
.include "tgi-kernel.inc"
|
||
|
.include "tgi-mode.inc"
|
||
|
.include "tgi-error.inc"
|
||
|
|
||
|
.macpack generic
|
||
|
|
||
|
; ******************************************************************************
|
||
|
|
||
|
; ----------------------------------------------------------------------
|
||
|
;
|
||
|
; Constants and tables
|
||
|
;
|
||
|
; ----------------------------------------------------------------------
|
||
|
|
||
|
; Graphics mode
|
||
|
.define grmode 6
|
||
|
; X resolution
|
||
|
.define x_res 160
|
||
|
; Y resolution
|
||
|
.define y_res 96
|
||
|
; Number of colors
|
||
|
.define colors 2
|
||
|
; Pixels per byte
|
||
|
.define ppb 8
|
||
|
; Screen memory size in bytes
|
||
|
.define scrsize x_res * y_res / ppb
|
||
|
; Pixel aspect ratio
|
||
|
.define aspect $0100 ; 1:1
|
||
|
; Free memory needed
|
||
|
.define mem_needed 1193
|
||
|
; Number of screen pages
|
||
|
.define pages 1
|
||
|
|
||
|
.rodata
|
||
|
mask_table: ; Mask table to set pixels
|
||
|
.byte %10000000, %01000000, %00100000, %00010000, %00001000, %00000100, %00000010, %00000001
|
||
|
masks: ; Color masks
|
||
|
.byte %00000000, %11111111
|
||
|
bar_table: ; Mask table for BAR
|
||
|
.byte %11111111, %01111111, %00111111, %00011111, %00001111, %00000111, %00000011, %00000001, %00000000
|
||
|
default_palette:
|
||
|
.byte $00, $0E
|
||
|
|
||
|
.code
|
||
|
|
||
|
; ******************************************************************************
|
||
|
|
||
|
.proc SETPALETTE
|
||
|
|
||
|
; ----------------------------------------------------------------------
|
||
|
;
|
||
|
; SETPALETTE: Set the palette (in ptr1)
|
||
|
;
|
||
|
; ----------------------------------------------------------------------
|
||
|
|
||
|
.code
|
||
|
; Copy the palette
|
||
|
ldy #colors - 1
|
||
|
loop: lda (ptr1),y
|
||
|
sta palette,y
|
||
|
dey
|
||
|
bpl loop
|
||
|
|
||
|
; Get the color entries from the palette
|
||
|
lda palette
|
||
|
sta COLOR4
|
||
|
lda palette + 1
|
||
|
sta COLOR0
|
||
|
|
||
|
; Done, reset the error code
|
||
|
lda #TGI_ERR_OK
|
||
|
sta error
|
||
|
rts
|
||
|
.endproc
|
||
|
|
||
|
.include "atari_tgi_common.inc"
|