22 Nov
2005
22 Nov
'05
6:51 a.m.
Subject: Re: BASIC's question mark and PRINT
From: Jim Battle <frustum at pacbell.net>
Date: Mon, 21 Nov 2005 23:12:05 -0600
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at
classiccmp.org>
Rich, if you can get your version 3.2 MS BASIC running on your Altair32 emulator
perhaps you can run the program and report what token is used for PRINT.
Altair basic V3.2 at startup looks at the sense switches (port adddress 377Q)
for a value that tells it if the SIO-A, SIO-B or 2SIO is the IO. The alternate
is to watch it run on the FP and stop it where it loops and look at the IO
instructions. Least that how it was done on the real Altair.
Allison