Path: utzoo!attcan!uunet!cs.utexas.edu!rutgers!apple!bloom-beacon!husc6!contact!umb!rouilj
From: rouilj@umb.umb.edu (John P. Rouillard)
Newsgroups: comp.sys.zenith.z100
Subject: Need CPM/ZDOS port info.
Keywords: CPM ZDOS Cromenco ports Basic P&T
Message-ID: <802@umb.umb.edu>
Date: 25 Jun 89 18:00:10 GMT
Reply-To: rouilj@umb.UUCP (John P. Rouillard)
Organization: Dept of Math and CS, UMass Boston.
Lines: 34

The program that I am writing uses Pickles and Trout IEEE-488 (GPIB)
software.  I have this running with BASCOM under ZDOS.  Another part
of the program needs to drive two stepper motors.  I am using a
cromenco A to D converter thatr is wired into the s-100 bus.

If I boot the machine with CPM, and load MBASIC, I can send a byte to
the port at address 24 (18H) with the folowing basic instruction.

  OUT 24,<byte>

This byte drives the lines high on the cromenco board.  But, when I
try to use the same command with BASCOM under ZDOS, I access the A:
floppy drive port.  I get the drive to spin and everything.

Does anybody have any idea what port I should be accessing under ZDOS
to get the 24 port under CPM.  Alternativly, does anyone know where I
should start looking for this info.  Any mauals that the department
had for this computer are missing.



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=== The opinions expressed above are all mine and belong to nobody else. ===
    John Rouillard           U-Mass Boston          rouilj@umb.umb.edu
    Physics Major            Harbor Campus          husc6!umb!rouilj
    Physics Department       Boston, MA 02125       rouilj%umb.edu@RELAY.CS.NET