mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-06 01:30:55 +11:00
440ea43a88
Initially, I used the same letters as those used in the z80 ref docs, but it makes the different assemblers harder to use than they should. Having consistent "argtype" rules across assemblers should help.
16 lines
511 B
Plaintext
16 lines
511 B
Plaintext
CODE (?br) ( 0x67 )
|
|
HL POP,
|
|
HLZ,
|
|
JRZ, L2 BWR ( br + 1. False, branch )
|
|
L1 BSET ( loop will jump here )
|
|
( True, skip next 2 bytes and don't branch )
|
|
IY INCd, IY INCd,
|
|
JPNEXT, NOP, NOP, NOP,
|
|
CODE (loop) ( 0x80 )
|
|
0 IX+ INC(IXY+), IFZ, 1 IX+ INC(IXY+), THEN, ( I++ )
|
|
( Jump if I <> I' )
|
|
A 0 IX+ LDrIXY, 2 IX- CP(IXY+), JRNZ, L2 BWR ( branch )
|
|
A 1 IX+ LDrIXY, 1 IX- CP(IXY+), JRNZ, L2 BWR ( branch )
|
|
( don't branch )
|
|
IX DECd, IX DECd, IX DECd, IX DECd, JR, L1 BWR
|