Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!linus!philabs!cmcl2!seismo!caip!clyde!cbatt!cbosgd!neoucom!wtm
From: wtm@neoucom.UUCP (Bill Mayhew)
Newsgroups: net.micro.apple
Subject: Apple 2E/enhanced monitor rom
Message-ID: <222@neoucom.UUCP>
Date: Thu, 3-Jul-86 23:51:41 EDT
Article-I.D.: neoucom.222
Posted: Thu Jul  3 23:51:41 1986
Date-Received: Sat, 5-Jul-86 05:15:25 EDT
Organization: Northeastern Ohio Universities College of Medicine
Lines: 31
Keywords: interrupt response time

/////
Hi,

	I just got in an Apple 2E/enhanced computer that is
replacing an older vanilla Apple 2E in an lab application that we
are running.  The application uses an ADC driven by interrupts to
look at a process every 100 cpu clocks.

	Everything was fine when we used regular Apple 2s and 2Es.
Now our application bombs, as the monitor ROM (under DOS 3.3) seems
to do something that regularly shuts off interrupts for 250-300 uS.

	I haven't received any tech info on what goodies the
enhanced version has yet.  (I thot it was just a new CG ROM with
the mouse characters, but they must've reworked the EF and/or CD
ROMS too).

	For my application, I don't give a hoot about the mouse
support.  What I was wondering, does anybody know if I can
de-enhance my computer by putting old ROMs in it?  Anybody happen
to know if the EF and CD ROMs can be replaced with 2764s?  It would
save us a lot of time to burn our own.

	Thanx in advance to any respondants.

Bill Mayhew
Division of Basic medical Sciences
N. E. Ohio Universities' College of Med.
4209 SR 44
Rootstown, OH  44272  USA     (216) 325-2511
...!allegra!neoucom!wtm  (or something like that?)