mirror of
https://github.com/cc65/cc65.git
synced 2024-12-25 02:29:52 +00:00
13482984ca
About all CONIO functions offering a <...>xy variant call popa _gotoxy By providing an internal gotoxy variant that starts with a popa all those CONIO function can be shortened by 3 bytes. As soon as program calls more than one CONIO function this means an overall code size reduction.
94 lines
2.2 KiB
ArmAsm
94 lines
2.2 KiB
ArmAsm
;
|
|
; Written by Groepaz/Hitmen <groepaz@gmx.net>
|
|
; Cleanup by Ullrich von Bassewitz <uz@cc65.org>
|
|
;
|
|
; void cputcxy (unsigned char x, unsigned char y, char c);
|
|
; void cputc (char c);
|
|
;
|
|
|
|
.export _cputcxy, _cputc, cputdirect, putchar
|
|
.export newline
|
|
.constructor initconio
|
|
.import gotoxy
|
|
.import ppuinit, paletteinit, ppubuf_put
|
|
.import setcursor
|
|
|
|
.importzp tmp3,tmp4
|
|
|
|
.include "nes.inc"
|
|
|
|
;-----------------------------------------------------------------------------
|
|
|
|
.code
|
|
|
|
_cputcxy:
|
|
pha ; Save C
|
|
jsr gotoxy ; Set cursor, drop x and y
|
|
pla ; Restore C
|
|
|
|
; Plot a character - also used as internal function
|
|
|
|
_cputc: cmp #$0d ; CR?
|
|
bne L1
|
|
lda #0
|
|
sta CURS_X
|
|
beq plot ; Recalculate pointers
|
|
|
|
L1: cmp #$0a ; LF?
|
|
beq newline ; Recalculate pointers
|
|
|
|
; Printable char of some sort
|
|
|
|
cputdirect:
|
|
jsr putchar ; Write the character to the screen
|
|
|
|
; Advance cursor position
|
|
|
|
advance:
|
|
ldy CURS_X
|
|
iny
|
|
cpy #xsize
|
|
bne L3
|
|
inc CURS_Y ; new line
|
|
ldy #0 ; + cr
|
|
L3: sty CURS_X
|
|
jmp plot
|
|
|
|
newline:
|
|
inc CURS_Y
|
|
|
|
; Set cursor position, calculate RAM pointers
|
|
|
|
plot: ldy CURS_X
|
|
ldx CURS_Y
|
|
jmp setcursor ; Set the new cursor
|
|
|
|
|
|
; Write one character to the screen without doing anything else, return X
|
|
; position in Y
|
|
|
|
putchar:
|
|
ora RVS ; Set revers bit
|
|
ldy SCREEN_PTR+1
|
|
ldx SCREEN_PTR
|
|
jmp ppubuf_put
|
|
|
|
;-----------------------------------------------------------------------------
|
|
; Initialize the conio subsystem. Code goes into the ONCE segment, which may
|
|
; be reused after startup.
|
|
|
|
.segment "ONCE"
|
|
|
|
initconio:
|
|
jsr ppuinit
|
|
jsr paletteinit
|
|
|
|
lda #0
|
|
sta RVS
|
|
sta CURS_X
|
|
sta CURS_Y
|
|
|
|
jmp plot ; Set the cursor
|
|
|
|
|