mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-05 22:00:54 +11:00
f6ded7712e
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.
17 lines
436 B
Plaintext
17 lines
436 B
Plaintext
PC ORG @ 0x1e + ! ( chkPS )
|
|
( 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,
|
|
( We have the return address for this very call on the stack
|
|
and protected registers. 2 - is to compensate that. )
|
|
HL PS_ADDR 2 - LDddnn,
|
|
SP SUBHLss,
|
|
EXX,
|
|
CNC RETcc, ( PS_ADDR >= SP? good )
|
|
JR, L2 BWR ( abortUnderflow-B298 )
|
|
|
|
|
|
|
|
|