12 Sep
2000
12 Sep
'00
3:45 a.m.
On Tue, 12 Sep 2000, Cini, Richard wrote:
... I also have some questions of actual users of the
Altair. I wanted
to use a copy of Palo Alto Tiny BASIC on the emulator (because that's the
BASIC that I have), but TB relies on CP/M for console I/O. Regarding the
original Altair BASIC, did the BASIC code provide its own I/O services or
did it use CP/M also?
The paper-tape based versions of Altair BASIC polled the 'sense switches'
to determine the type of I/O to be used, and by inferrence the port
numbers. It contained its own I/O routines.
What port locations were generally used to service
serial ports used for console I/O?
The closest thing to a 'standard' selection (also used in the disk based
versions of BASIC) was for the 2-SIO board which was located at ports 20
and 21 (octal).
Does anyone have a working set of CP/M
binaries that I can load into the emulator?
For what disk sub-system? (Mits, Tarbell, etc...???)
-jim
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