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PCDOSHDR
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1991-06-01
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2KB
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50 lines
// Free BCPL - PCDOSHDR Header for PC-DOS dependent RTS interface Version 1.5
global $( // private globals used by RTS
INITRTS : 99 // (bot,top) - initialise RTS (bot&top passed to initheap)
STREAMS :100 // vec - streams descriptor (holds state and ungot ch)
CURIN :101 // # - current input stream
CUROUT :102 // # - current output stream
A.HEAPBASE :103 // # - base of heap area
A.HEAPTOP :104 // # - top of heap area
A.HEAPFREE :105 // # - free location in heap area
A.STACKBASE :106 // # - base of BCPL stack
A.STACKTOP :107 // # - maximum BCPL stack
DEBUGINTERN :108 // () - internal debug functions
JMPGLOB :109 // () - interrupt handler for resident RTS
$)
manifest $( // stream error/status flags
S.ERROR = #x8000
S.EOF = #x4000
S.UNGOT = #x2000
S.BINARY = #x1000
S.DEFAULT = #x0800
S.BUFFERED = #x0400
S.INPUT = #x0200
S.OUTPUT = #x0100
$)
manifest $( // stream buffer offsets
S.BUFLEN = 512 // bytes
S.BUFPTR = -1
S.BUFMAX = -2
S.BUFEXTRA = 2
$)
manifest $( // some PSP header entries
PSP.NXTSEG = 1 // ! paragraph number following top of memory
PSP.SEGLEN = 3 // ! length of this segment in bytes
PSP.ENVSEG = 22 // ! segment of environment strings
$)