6502/lzsa
1
0
Fork 0
mirror of https://github.com/emmanuel-marty/lzsa.git synced 2024-06-03 06:29:27 +00:00
Code Issues Projects Releases Wiki Activity

One byte saving for setting reg A to $FF in 6809 LZSA2 depacker

Browse Source
This commit is contained in:
Doug Masten 2020-06-26 23:57:01 -05:00
parent e397428c1f
commit 137c6201be
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
asm/6809/unlzsa2b.s
View File

@ -74,7 +74,7 @@ lz2nolt ldb ,s ; get token again, don't pop it from the stack
rolb ; shift Z flag from carry into bit 0 of B
eorb #$e1 ; set bits 5-7 of offset, reverse bit 0
lda #$ff ; set bits 8-15 of offset
sex ; set bits 8-15 of offset to $FF
bra lz2gotof
lz2offs9 clra ; clear A (to prepare for high 8 bits of offset)