Path: utzoo!attcan!uunet!ginosko!rex!ames!apple!agate!ucbvax!UCONNVM.BITNET!SEWALL
From: SEWALL@UCONNVM.BITNET (Murph Sewall)
Newsgroups: comp.sys.apple
Subject: Re: Slot Assignments
Message-ID: <8907201052.aa00738@SMOKE.BRL.MIL>
Date: 20 Jul 89 14:10:16 GMT
References: <dseah@WPI>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 20

>I've heard that the Transwarp GS board puts up a graphics screen when you
>powerup.  If this is true, how does the Transwarp get control?  Does it
>immediately pull a non maskable interrupt and grab the buses, then control the
>Apple in all its entirety?

The TWGS is the MAIN CPU! (recall it REPLACES the 65816 that comes from
the factory).  It's not too surprising thaat the accelerator has some power
up diagnostics, etc.  Adding a little code to display a graphic ahead of
the 'bootstrap' ROM is no hassle (assuming the capacity of whatever on-board
chip contains the power-up ROM has more memory than is needed for that
purpose).

Murph Sewall                       Vaporware? ---> [Gary Larson returns 1/1/90]
Prof. of Marketing     Sewall@UConnVM.BITNET
Business School        sewall%uconnvm.bitnet@mitvma.mit.edu          [INTERNET]
U of Connecticut       {psuvax1 or mcvax }!UCONNVM.BITNET!SEWALL     [UUCP]
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