90 lines
969 B
ArmAsm
90 lines
969 B
ArmAsm
;============================
|
|
; do the pan
|
|
|
|
horiz_pan:
|
|
|
|
pan_loop:
|
|
|
|
lda #0
|
|
sta COUNT
|
|
|
|
pan_outer_outer_loop:
|
|
|
|
ldx #191
|
|
pan_outer_loop:
|
|
|
|
lda hposn_high,X
|
|
sta pil_smc1+2
|
|
sta pil_smc2+2
|
|
sta pil_smc3+2
|
|
|
|
; sta pil_smc4+2
|
|
; eor #$60
|
|
|
|
|
|
lda hposn_low,X
|
|
sta pil_smc1+1
|
|
sta pil_smc2+1
|
|
sta pil_smc3+1
|
|
inc pil_smc3+1
|
|
|
|
; clc
|
|
; adc COUNT
|
|
; sta pil_smc3+1
|
|
; sta pil_smc4+1
|
|
stx XSAVE
|
|
|
|
|
|
ldy #0
|
|
|
|
; original: 36*39 = ??
|
|
; updated: 34*39
|
|
|
|
pil_smc1:
|
|
ldx $2000,Y ; 4+
|
|
pan_inner_loop:
|
|
|
|
lda left_lookup_main,X ; 4+
|
|
sta TEMPY ; 3
|
|
|
|
pil_smc3:
|
|
ldx $2000+1,Y ; 4+
|
|
lda left_lookup_next,X ; 4+
|
|
ora TEMPY ; 3
|
|
|
|
pil_smc2:
|
|
sta $2000,Y ; 5
|
|
|
|
iny ; 2
|
|
cpy #39 ; 2
|
|
bne pan_inner_loop ; 2/3
|
|
|
|
; leftover
|
|
|
|
;pil_smc3:
|
|
; lda $4000
|
|
;pil_smc4:
|
|
; sta $2000,Y
|
|
|
|
ldx XSAVE
|
|
|
|
dex
|
|
cpx #$ff
|
|
bne pan_outer_loop
|
|
|
|
lda KEYPRESS
|
|
bmi done_pan
|
|
|
|
inc COUNT
|
|
lda COUNT
|
|
cmp #139
|
|
|
|
bne pan_outer_outer_loop
|
|
|
|
done_pan:
|
|
bit KEYRESET
|
|
|
|
rts
|
|
|
|
.include "scroll_tables.s"
|