Apple-2-SW/dos33fsprogs
1
0
Fork 0
mirror of https://github.com/deater/dos33fsprogs.git synced 2025-01-13 22:30:49 +00:00
Code Issues Projects Releases Wiki Activity

dya: copying... this is suspiciously easy

Browse Source
This commit is contained in:
Vince Weaver 2018-11-20 12:24:11 -05:00
parent c1ce7d59a8
commit b3ab064899
1 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
dya/chiptune_player.s
View File

@ -557,6 +557,34 @@ page_copy_loop:
sta $1000,X ; 5
inx ; 2
bne page_copy_loop ; 2nt/3
;========================
; page copy2
;========================
; want to copy:
; SRC: chunk_buffer+(2*256)+(COPY_OFFSET*3*256)
; DST: chunk_buffer+$2A00+(COPY_OFFSET*256)
page_copy2:
clc ; 2
lda #>(UNPACK_BUFFER2+512) ; 3
adc COPY_OFFSET ; 3
adc COPY_OFFSET ; 3
adc COPY_OFFSET ; 3
sta page_copy_loop2+2 ; self modify ; 5
lda #>(UNPACK_BUFFER2+$2A00) ; 2
adc COPY_OFFSET ; 3
sta page_copy_loop2+5 ; self modify ; 5
ldx #$00 ; 2
page_copy_loop2:
lda $1000,x ; 4
sta $1000,X ; 5
inx ; 2
bne page_copy_loop2 ; 2nt/3
rts ; 6
;======================
; 2+14*256+6+29= 3621