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Digital Research
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Sepp J Morris
2020-11-06 18:50:37 +01:00
parent 621ed8ccaf
commit 31738079c4
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40
CONTRIBUTIONS/cpm-handbook/cpmsrc/FIG5-10.ASM Normal file
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; Figure 5-10
;
; IOBYTE Equates
; These are for accessing the IOBYTE.
;
; Mask Values to isolate specific devices.
; (These can also be inverted to preserve all BUT the
; specific device)
;
IO$CONM EQU 0000$0011B ;Console Mask
IO$RDRM EQU 0000$1100B ;Reader Mask
IO$PUNM EQU 0011$0000B ;Punch Mask
IO$LSTM EQU 1100$0000B ;List Mask
;
;Console Values
IO$CTTY EQU 0 ;Console -> TTY:
IO$CCRT EQU 1 ;Console -> CRT:
IO$CBAT EQU 2 ;Console Input <- RDR:
;Console Output -> LST:
IO$CUC1 EQU 3 ;Console -> UC1: (User console 1)
;
;Reader Values
IO$RTTY EQU 0 SHL 2 ;Reader <- TTY:
IO$RRDR EQU 1 SHL 2 ;Reader <- RDR:
IO$RUR1 EQU 2 SHL 2 ;Reader <- UR1: (User Reader 1)
IO$RUR2 EQU 3 SHL 2 ;Reader <- UR2: (user Reader 2)
;
;Punch Values
IO$PTTY EQU 0 SHL 4 ;Punch -> TTY:
IO$PPUN EQU 1 SHL 4 ;Punch -> PUN:
IO$PUP1 EQU 2 SHL 4 ;Punch -> UP1: (User Punch 1)
IO$PUP2 EQU 3 SHL 4 ;Punch -> UP2: (User Punch 2)
;
;List Values
IO$LTTY EQU 0 SHL 6 ;List -> TTY:
IO$LCRT EQU 1 SHL 6 ;List -> CRT:
IO$LLPT EQU 2 SHL 6 ;List -> LPT: (Physical Line Printer)
IO$LUL1 EQU 3 SHL 6 ;List -> UL1: (User List 1)
;