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From: kenny@uiucdcsb.CS.UIUC.EDU
Newsgroups: net.micro.cpm
Subject: Re: Misusing Z80 registers
Message-ID: <4800014@uiucdcsb>
Date: Fri, 20-Jun-86 12:03:00 EDT
Article-I.D.: uiucdcsb.4800014
Posted: Fri Jun 20 12:03:00 1986
Date-Received: Sun, 22-Jun-86 04:28:19 EDT
References: <1204@brl-smoke.ARPA>
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Nf-ID: #R:brl-smoke.ARPA:1204:uiucdcsb:4800014:000:759
Nf-From: uiucdcsb.CS.UIUC.EDU!kenny    Jun 20 11:03:00 1986


/* Written  3:48 pm  Jun  8, 1986 by hildum@ucb-vax.ARPA in uiucdcsb:net.micro.cpm */
/* ---------- "Misusing Z80 registers" ---------- */

If you assume that a program should save the ix, iy, af', etc registers
before calling the operating system, then Turbo Pascal falls into the
catagory of misusing registers.  It expects the index registers to be saved
by the operating system, which, unfortunately, my VT180 does not do.  This
causes the find and replace operations in the turbo editor to fail.

				Eric Hildum
/* End of text from uiucdcsb:net.micro.cpm */

It's fairly common for BIOSes (BIOTA?) to clobber the index registers.  My
Altos 5-15 does it, too, which explains why the Turbo editor doesn't work on
it, either.  Philippe, are you listening?