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From: eirikur@kallon.dec.com (Eirikur Hallgrimsson)
Newsgroups: comp.sys.tandy
Subject: Need Model 100 help getting data back from ROM calls.
Keywords: CALL,BASIC,ROM
Message-ID: <11060@shlump.nac.dec.com>
Date: 4 May 90 18:23:05 GMT
Sender: newsdaemon@shlump.nac.dec.com
Organization: Digital Equipment Corporation
Lines: 18


I've been called-in as a Model 100 semi-expert to consult on a science
application that wants to run a timer based on how long a key is held down.
INKEY$ just won't hack it.  I need (at least) to call the keyboard scan
routines.  What I don't understand is how to get back the data that the ROM
routine leaves in a register.  The call statement neatly sets up the registers
with arguments that you pass, but how do you then read the registers when the
routine passes control back to you?  I feel like I must be missing something.

Replies by mail would be most welcome, but I'll come back and take a look here,
too.


"I came to discuss plastic surgery, but I could wait."
					-- Martha Frankel

Eirikur Hallgrimsson
eh@ddif.enet.dec.com