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.export _port_stat_screen, _redraw_port_stat
.import _port_stat_dirty
.importzp ptr1, ptr2
srcptr = ptr1
dstptr = ptr2
.include "atari.inc"
; PORTSTAT.DAT is created on the H: device by running mkportstats.xex
; in atari800. H: needs to be set writable and pointed to the current
; directory.
.rodata
_port_stat_screen:
.incbin "PORTSTAT.DAT"
screenlen = * - _port_stat_screen
screenpages = >screenlen
partial = <screenlen
.ifdef CART_TARGET
.segment "HIGHCODE"
.else
.code
.endif
; only redraw the port status screen if needed. this saves 53 bytes
; compared to using memcpy().
; void redraw_port_stat(void);
_redraw_port_stat:
;lda _port_stat_dirty
;beq @done
lda #<_port_stat_screen
sta srcptr
lda #>_port_stat_screen
sta srcptr+1
; add 40 because PORTSTAT.DAT no longer contains the all-blank
; first line.
lda SAVMSC
clc
adc #$28
sta dstptr
lda SAVMSC+1
adc #$00
sta dstptr+1
; copy screenpages pages
ldx #screenpages
ldy #0
@pageloop:
lda (srcptr),y
sta (dstptr),y
dey
bne @pageloop
inc srcptr+1
inc dstptr+1
dex
bne @pageloop
; copy last (partial) page. we know Y is 0 here.
;sty _port_stat_dirty ; do not clear the flag, the caller will
@partloop:
lda (srcptr),y
sta (dstptr),y
iny
cpy #partial
bne @partloop
@done:
rts
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