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BDS-BIOS.CSM
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2000-06-30
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46 lines
;
; (c) 1984 Kevin W. Rudd
; All Commercial Rights Reserved
; This set of routines is presented into the public
; domain for any non-commercial use provided this
; message is included.
;
; cpm plus (vers 3.0) versions of BDS-C bios and biosh functions
;
INCLUDE "bds.lib"
FUNCTION bios
call arghak
push b
lda arg1 ;get function number (1-85)
sta bios3x+0 ;store in FUNC byte
lhld arg2 ;get value to be put in BCREG
shld bios3x+2 ;store it in BCREG word
mvi c,50 ;cpm3 bdos call for dir bios call
lxi d,bios3x ;get addr of block
call bdos ;execute it
pop b ;restore b register
ret ;and return to caller
ENDFUNC
FUNCTION biosh
call arghak
push b
lda arg1 ;get function number (1-85)
sta bios3x+0 ;store in FUNC byte
lda arg2 ;get value to be put in AREG
sta bios3x+1 ;store in BCREG word
lhld arg3 ;get value to be put in BCREG
shld bios3x+2 ;store it in BCREG word
lhld arg4 ;get value to be put in DEREG
shld bios3x+4 ;store it in DEREG word
lhld arg5 ;get value to be put in HLREG
shld bios3x+6 ;store it in HLREG word
mvi c,50 ;cpm3 bdos call for dir bios call
lxi d,bios3x ;get addr of block
call bdos ;execute it
pop b ;all done. Leave return value in HL
ret ;and return to caller
ENDFUNC