mirror of
https://github.com/cc65/cc65.git
synced 2024-11-11 16:07:04 +00:00
74 lines
1.1 KiB
ArmAsm
74 lines
1.1 KiB
ArmAsm
;
|
|
; Ullrich von Bassewitz, 06.08.1998
|
|
;
|
|
; void cputcxy (unsigned char x, unsigned char y, char c);
|
|
; void cputc (char c);
|
|
;
|
|
|
|
.constructor initconio
|
|
.export _cputcxy, _cputc
|
|
.export _gotoxy, cputdirect
|
|
.export newline, putchar
|
|
|
|
.import popa, SETWND, BASCALC
|
|
|
|
.include "apple2.inc"
|
|
|
|
initconio:
|
|
lda #$FF ; Normal character display mode
|
|
sta INVFLG
|
|
lda #$00
|
|
jsr SETWND ; Reset text window to full screen
|
|
rts
|
|
|
|
; Plot a character - also used as internal function
|
|
|
|
_cputcxy:
|
|
pha ; Save C
|
|
jsr popa ; Get Y
|
|
jsr _gotoxy
|
|
pla ; Restore C
|
|
|
|
_cputc:
|
|
cmp #$0D ; Test for \r = carrage return
|
|
beq left
|
|
cmp #$0A ; Test for \n = line feed
|
|
beq newline
|
|
ora #$80 ; Turn on high bit
|
|
cmp #$E0 ; Test for lowercase
|
|
bcc cputdirect
|
|
and #$DF ; Convert to uppercase
|
|
|
|
cputdirect:
|
|
jsr putchar
|
|
inc CH ; Bump to next column
|
|
lda CH
|
|
cmp #40
|
|
bne done
|
|
left: lda #$00 ; Goto left edge of screen
|
|
sta CH
|
|
done: rts
|
|
|
|
newline:
|
|
inc CV
|
|
lda CV
|
|
cmp #24
|
|
bne :+
|
|
lda #$00
|
|
sta CV
|
|
: jsr BASCALC
|
|
rts
|
|
|
|
putchar:
|
|
and INVFLG ; Apply normal, inverse, flash
|
|
ldy CH
|
|
sta (BASL),Y
|
|
rts
|
|
|
|
_gotoxy:
|
|
sta CV ; Store Y
|
|
jsr BASCALC
|
|
jsr popa ; Get X
|
|
sta CH ; Store X
|
|
rts
|