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em 1985-03-18 13:12:07 +00:00
parent 80e349860b
commit c5508c7c0b
1 changed files with 32 additions and 1 deletions
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33
mach/i80/libmon/mon.s
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@ -7,6 +7,9 @@
! number 1: exit ! number 1: exit
! number 3: read ! number 3: read
! number 4: write ! number 4: write
! number 5: open
! number 6: close
! number 54: ioctl
! If called with a number of a call that is not implemented, ! If called with a number of a call that is not implemented,
! a trap is generated. ! a trap is generated.
@ -24,10 +27,16 @@
jz monread ! is it a read? jz monread ! is it a read?
cpi 4 cpi 4
jz monwrite ! is it a write? jz monwrite ! is it a write?
cpi 5
jz monopen ! is it an open?
cpi 6
jz monclose ! is it a close?
cpi 54
jz monioctl
jmp ebadmon ! trap jmp ebadmon ! trap
monexit: monexit:
rst 4 jmp .stop
monread: monread:
pop h ! file-descriptor, not used pop h ! file-descriptor, not used
@ -69,6 +78,28 @@ monwrite:
2: push d ! no error 2: push d ! no error
jmp monret jmp monret
monopen:
pop h ! pointer to string
pop h ! flag
lxi h,-1
push h ! push file descriptor
push h ! push error code twice
push h
jmp monret
monclose:
lxi h,0
xthl ! remove file descriptor and push error code
jmp monret
monioctl:
pop h ! file descriptor
pop h ! request
lxi h,0
xthl ! remove argp and push error code
jmp monret
monret: monret:
lhld .bcreg lhld .bcreg
mov b,h mov b,h