Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!ucbvax!TCGOULD.TN.CORNELL.EDU!wilker
From: wilker@TCGOULD.TN.CORNELL.EDU (Clarence W. Wilkerson Jr.)
Newsgroups: comp.sys.m68k.pc
Subject: Re: help cpm 68k
Message-ID: <4607@batcomputer.tn.cornell.edu>
Date: 29 Apr 88 05:29:46 GMT
References: <4116@latcs1.oz>
Sender: mwm@ucbvax.BERKELEY.EDU
Organization: Theory Center, Cornell U., Ithaca NY
Lines: 17
Keywords: Fn nos, calling conventions
Summary: if this is like cpm-80/86
Approved: info-68k@ucbvax.berkeley.edu


In article <4116@latcs1.oz>, ray@latcs1.OZ.AU (Douglas Ray) writes:
> 
> 
> A group of us have been asked to write an emulator for the 68000.   It requires
> minimal character/string io, and for the sake of standardisation we were asked
> to use CP/M 68k calling conventions.   Anyone got any CP/M 68k documentation?
> 		-douglas ray (ray@latcs1.oz) (LaTrobe CompSci)

There are calls #9 (print a string terminated by $) and 10 ( read
into a buffer. The first byte is max length of input string, the
second is actual length, followed by characters input. A ^J or ^M
terminates the input ( bu t I think is not stored in the string.)
 However, I don't know how parameters are passed in CPM-68k. As near
 as I can tell from looking a a Dr. Dobbs article on a 8080 emulator
 under CPM68k, one loads long addresses into d1, and the function
 number into d0, and then calls bdos (listed as $4e42 )