mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-27 17:29:49 +00:00
61 lines
1.6 KiB
ArmAsm
61 lines
1.6 KiB
ArmAsm
|
;=========================================================
|
||
|
|
; gr_copy_to_current, 40x48 version
|
||
|
|
;=========================================================
|
||
|
|
; copy 0xc00 to DRAW_PAGE
|
||
|
|
;
|
||
|
|
; 45 + 2 + 120*(8*9 + 5) -1 + 6 = 9292
|
||
|
|
|
||
|
|
gr_copy_to_current:
|
||
|
|
|
||
|
|
lda DRAW_PAGE ; 3
|
||
|
|
clc ; 2
|
||
|
|
adc #$4 ; 2
|
||
|
|
sta gr_copy_line+5 ; 4
|
||
|
|
sta gr_copy_line+11 ; 4
|
||
|
|
adc #$1 ; 2
|
||
|
|
sta gr_copy_line+17 ; 4
|
||
|
|
sta gr_copy_line+23 ; 4
|
||
|
|
adc #$1 ; 2
|
||
|
|
sta gr_copy_line+29 ; 4
|
||
|
|
sta gr_copy_line+35 ; 4
|
||
|
|
adc #$1 ; 2
|
||
|
|
sta gr_copy_line+41 ; 4
|
||
|
|
sta gr_copy_line+47 ; 4
|
||
|
|
;===========
|
||
|
|
; 45
|
||
|
|
|
||
|
|
ldy #119 ; for early ones, copy 120 bytes ; 2
|
||
|
|
|
||
|
|
gr_copy_line:
|
||
|
|
lda $C00,Y ; load a byte (self modified) ; 4
|
||
|
|
sta $400,Y ; store a byte (self modified) ; 5
|
||
|
|
|
||
|
|
lda $C80,Y ; load a byte (self modified) ; 4
|
||
|
|
sta $480,Y ; store a byte (self modified) ; 5
|
||
|
|
|
||
|
|
lda $D00,Y ; load a byte (self modified) ; 4
|
||
|
|
sta $500,Y ; store a byte (self modified) ; 5
|
||
|
|
|
||
|
|
lda $D80,Y ; load a byte (self modified) ; 4
|
||
|
|
sta $580,Y ; store a byte (self modified) ; 5
|
||
|
|
|
||
|
|
lda $E00,Y ; load a byte (self modified) ; 4
|
||
|
|
sta $600,Y ; store a byte (self modified) ; 5
|
||
|
|
|
||
|
|
lda $E80,Y ; load a byte (self modified) ; 4
|
||
|
|
sta $680,Y ; store a byte (self modified) ; 5
|
||
|
|
|
||
|
|
lda $F00,Y ; load a byte (self modified) ; 4
|
||
|
|
sta $700,Y ; store a byte (self modified) ; 5
|
||
|
|
|
||
|
|
lda $F80,Y ; load a byte (self modified) ; 4
|
||
|
|
sta $780,Y ; store a byte (self modified) ; 5
|
||
|
|
|
||
|
|
dey ; decrement pointer ; 2
|
||
|
|
bpl gr_copy_line ; ; 2nt/3
|
||
|
|
gr_copy_line_end:
|
||
|
|
rts ; 6
|
||
|
|
|
||
|
|
|
||
|
|
.assert >gr_copy_line = >gr_copy_line_end, error, "gr_copy_to_current crosses page"
|