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From: piner@pur-phy.UUCP (Richard Piner)
Newsgroups: net.micro
Subject: re: TRS-80 model 3 CP/M
Message-ID: <1137@pur-phy.UUCP>
Date: Tue, 17-Jan-84 00:36:19 EST
Article-I.D.: pur-phy.1137
Posted: Tue Jan 17 00:36:19 1984
Date-Received: Wed, 11-Jan-84 03:25:24 EST
Organization: Purdue University Physics Dept.
Lines: 14


  From my own experience, if you want to do Z80 assembly on a TRS-80,
forget CP/M. To do CP/M properly, you need a hardware mod. The TRS-80 does have ROM's. I suggest that you get LDOS 5.1.4 and the
new assembly package from Radio Shack. The assembler is the
Microsoft macro assembler. It does a good job. LDOS includes system
calls for reading and writting to the keyboard/display and disk
files. It has quite a number of usefull system calls, even integer
divide and multiply. LDOS documentation also includes a memory map
that is very useful. It is a good system for doing assembly. Note
that standard CP/M is 8080 code only, not Z80. 

					Rich Piner
					Purdue Physics Dept.