mirror of
https://github.com/mi57730/a2d.git
synced 2024-11-29 07:49:20 +00:00
134 lines
3.1 KiB
ArmAsm
134 lines
3.1 KiB
ArmAsm
;;; ============================================================
|
|
;;; Overlay for Disk Copy - $1800 - $19FF (file 2/4)
|
|
;;; ============================================================
|
|
|
|
.proc disk_copy_overlay2
|
|
.org $1800
|
|
|
|
jmp start
|
|
|
|
;;; ============================================================
|
|
|
|
DEFINE_OPEN_PARAMS open_params, filename, $1C00
|
|
filename: PASCAL_STRING "DeskTop2"
|
|
|
|
DEFINE_READ_PARAMS read_params, 0, 0
|
|
DEFINE_SET_MARK_PARAMS set_mark_params, $133E0
|
|
DEFINE_CLOSE_PARAMS close_params
|
|
|
|
.byte $00,$00
|
|
|
|
buf1: .addr $4000
|
|
dest1: .addr $D000
|
|
len1: .word $2200
|
|
|
|
buf2: .addr $800
|
|
len2: .word $B00
|
|
|
|
;;; ============================================================
|
|
|
|
start: lda #$41 ; ???
|
|
sta RAMWRTON
|
|
sta $0100
|
|
sta $0101
|
|
sta RAMWRTOFF
|
|
|
|
;; Free up system bitmap
|
|
ldx #BITMAP_SIZE-3
|
|
lda #0
|
|
L183F: sta BITMAP+1,x
|
|
dex
|
|
bpl L183F
|
|
|
|
yax_call MLI_RELAY, OPEN, open_params
|
|
lda open_params::ref_num
|
|
sta read_params::ref_num
|
|
sta set_mark_params::ref_num
|
|
|
|
yax_call MLI_RELAY, SET_MARK, set_mark_params
|
|
copy16 buf1, read_params::data_buffer
|
|
copy16 len1, read_params::request_count
|
|
yax_call MLI_RELAY, READ, read_params
|
|
jsr copy_to_lc
|
|
|
|
copy16 buf2, read_params::data_buffer
|
|
copy16 len2, read_params::request_count
|
|
yax_call MLI_RELAY, READ, read_params
|
|
yax_call MLI_RELAY, CLOSE, close_params
|
|
sta ALTZPON
|
|
lda LCBANK1
|
|
lda LCBANK1
|
|
|
|
jmp MGTK_RELAY
|
|
|
|
;;; ============================================================
|
|
;;; Copy first chunk to the Language Card
|
|
|
|
.proc copy_to_lc
|
|
src := $6
|
|
end := $8
|
|
dst := $A
|
|
|
|
;; Bank in AUX LC
|
|
sta ALTZPON
|
|
lda LCBANK1
|
|
lda LCBANK1
|
|
txa
|
|
asl a
|
|
tax
|
|
|
|
;; Set up pointers
|
|
lda buf1
|
|
sta src
|
|
clc
|
|
adc len1
|
|
sta end
|
|
lda buf1+1
|
|
sta src+1
|
|
adc len1+1
|
|
sta end+1
|
|
lda dest1
|
|
sta dst
|
|
lda dest1+1
|
|
sta dst+1
|
|
|
|
;; Do the copy
|
|
ldy #0
|
|
loop: lda (src),y
|
|
sta (dst),y
|
|
inc src
|
|
inc dst
|
|
lda src
|
|
bne :+
|
|
inc src+1
|
|
inc dst+1
|
|
: lda src+1
|
|
cmp end+1
|
|
bne loop
|
|
lda src
|
|
cmp end
|
|
bne loop
|
|
|
|
;; Bank in ROM
|
|
sta ALTZPOFF
|
|
lda ROMIN2
|
|
rts
|
|
.endproc
|
|
|
|
;;; ============================================================
|
|
|
|
.proc MLI_RELAY
|
|
sty call
|
|
stax params
|
|
jsr MLI
|
|
call: .byte 0
|
|
params: .addr 0
|
|
self: bne self ; hang if fails
|
|
rts
|
|
.endproc
|
|
|
|
;;; ============================================================
|
|
|
|
PAD_TO $1A00
|
|
|
|
.endproc ; disk_copy_overlay2
|