mirror of
https://github.com/cc65/cc65.git
synced 2024-06-02 04:41:35 +00:00
145 lines
2.0 KiB
ArmAsm
145 lines
2.0 KiB
ArmAsm
;
|
|
; Mark Keates, Christian Groessler, Piotr Fusik, Karri Kaksonen
|
|
;
|
|
; void cputcxy (unsigned char x, unsigned char y, char c);
|
|
; void cputc (char c);
|
|
;
|
|
|
|
.export _cputc
|
|
.export _textcolor
|
|
.import _gotoxy, _gotox, _gotoy, tosaddax, tosumula0, pusha0
|
|
.import pushax
|
|
.import _screen
|
|
.importzp ptr3
|
|
.import CURS_X, CURS_Y
|
|
|
|
.include "atari7800.inc"
|
|
|
|
.data
|
|
;-----------------------------------------------------------------------------
|
|
; Holder of the text colour offset
|
|
; 0 = red, 42 = green, 82 = white
|
|
;
|
|
txtcolor:
|
|
.byte 0
|
|
|
|
.code
|
|
|
|
;-----------------------------------------------------------------------------
|
|
; Change the text colour
|
|
;
|
|
; Logical colour names are
|
|
; 0 = red
|
|
; 1 = green
|
|
; 2 = white
|
|
;
|
|
; The routine will also return the previous textcolor
|
|
;
|
|
.proc _textcolor
|
|
|
|
beq @L2
|
|
sec
|
|
sbc #1
|
|
beq @L1
|
|
lda #82
|
|
jmp @L2
|
|
@L1: lda #42
|
|
@L2: ldy txtcolor
|
|
sta txtcolor
|
|
tya
|
|
bne @L3
|
|
rts
|
|
@L3: sec
|
|
sbc #42
|
|
bne @L4
|
|
lda #1
|
|
rts
|
|
@L4: lda #2
|
|
rts
|
|
.endproc
|
|
|
|
;-----------------------------------------------------------------------------
|
|
; Put a character on screen
|
|
;
|
|
; The code will handle newlines that wrap to start of screen
|
|
;
|
|
.proc _cputc
|
|
|
|
cmp #$0A ; LF
|
|
beq @L3
|
|
cmp #$20 ; ' '
|
|
beq @L1
|
|
|
|
jsr @L5
|
|
@L1:
|
|
lda CURS_X
|
|
cmp #(charsperline-1)
|
|
bne @L2
|
|
jmp @L3
|
|
@L2:
|
|
clc
|
|
adc #1
|
|
jmp _gotox
|
|
|
|
@L3:
|
|
lda #0
|
|
jsr _gotox
|
|
lda CURS_Y
|
|
cmp #(screenrows-1)
|
|
bne @L4
|
|
lda #0
|
|
jmp _gotoy
|
|
@L4:
|
|
clc
|
|
adc #1
|
|
jmp _gotoy
|
|
|
|
@L5:
|
|
cmp #$3F ; '?'
|
|
bne @L6
|
|
lda #$01
|
|
jmp @L10
|
|
@L6:
|
|
cmp #$7C ; '|'
|
|
bne @L7
|
|
lda #$05
|
|
jmp @L10
|
|
@L7:
|
|
cmp #$41 ; >= 'A'
|
|
bcc @L8
|
|
and #$5F
|
|
sec
|
|
sbc #($41 - 16)
|
|
jmp @L10
|
|
@L8:
|
|
sec
|
|
sbc #($2A)
|
|
@L10:
|
|
sec
|
|
adc txtcolor
|
|
asl
|
|
pha
|
|
|
|
lda CURS_Y
|
|
jsr pusha0
|
|
lda #charsperline
|
|
jsr tosumula0
|
|
clc
|
|
adc CURS_X
|
|
bcc @L11
|
|
inx
|
|
@L11: jsr pushax
|
|
lda #<(_screen)
|
|
ldx #>(_screen)
|
|
jsr tosaddax
|
|
sta ptr3
|
|
stx ptr3+1
|
|
|
|
pla
|
|
ldy #0
|
|
sta (ptr3),y
|
|
rts
|
|
|
|
.endproc
|
|
|