The Simple JSYS Interface
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This is a loadble option [Load Jsys; in RLISP, (Load Jsys) in LISP].
[Explain why it is useful.]
5 Syslisp functions: XJSYSn(R1,R2,R3,R4,Jnum) -> result of Rn in R1
5 LISP functions: JSYSn(R1,R2,R3,R4,Jnum) ->Rn in R1
Ri given as Lisp Integers or Strings.
Tags removed converted to W-int or StringPointer.
Jsys Names are defined as NEWNAMs, eg jsPBIN, jsPBOUT, etc.
Support Functions:
LowHalfWord(X), HighHalfWord(X), Xword(Hi,Lo),
Bits L, where L is list of BitPos or (FieldVal . RightBitPos)
(See Files JSYS0.RED and EXEC0.RED on PU:)