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collapseos
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collapseos/blk/299

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Copy boot.z80 to blkfs
2020-04-23 11:19:12 +10:00
PC ORG @ 0x1e + ! ( chkPS )
Optimize chkPS Use EXX instead of the stack for HL protection and remove all spurious uses of chkPS, I wanted to inline chkPS in next because of its "tight loop" status, but for reasons I don't understand, doing so breaks Collapse OS. Later...
2020-05-23 13:12:03 +10:00
( Note that you only need to call this in words that push
back to PSP. If they don't, calling chkPS is redundant with
check in next )
EXX,
Copy boot.z80 to blkfs
2020-04-23 11:19:12 +10:00
( We have the return address for this very call on the stack
Optimize chkPS Use EXX instead of the stack for HL protection and remove all spurious uses of chkPS, I wanted to inline chkPS in next because of its "tight loop" status, but for reasons I don't understand, doing so breaks Collapse OS. Later...
2020-05-23 13:12:03 +10:00
and protected registers. 2 - is to compensate that. )
HL PS_ADDR 2 - LDddnn,
Copy boot.z80 to blkfs
2020-04-23 11:19:12 +10:00
SP SUBHLss,
Optimize chkPS Use EXX instead of the stack for HL protection and remove all spurious uses of chkPS, I wanted to inline chkPS in next because of its "tight loop" status, but for reasons I don't understand, doing so breaks Collapse OS. Later...
2020-05-23 13:12:03 +10:00
EXX,
Replace INITIAL_SP with PS_ADDR conf Now I struggle to remember why I ever did things they way I did. There must have been a reason...
2020-05-12 11:08:24 +10:00
CNC RETcc, ( PS_ADDR >= SP? good )
Copy boot.z80 to blkfs
2020-04-23 11:19:12 +10:00
JR, L2 BWR ( abortUnderflow-B298 )
VE: add 't' This is the first commit I do entirely in VE. It's a habit I'm planning on taking as it helps a lot to find usability issues.
2020-06-12 08:12:01 +10:00