Re: BOOK: OS/2 Warp Unleashed, 4th Edition cancelled

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Article #4596

#4596

From: Brandon S. Allbery KF8NH; to rep...
Date: Tue, 12 Aug 1997 00:00

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In <33EFF591.A@ibm.nospam>, on 08/11/97 at 10:33 PM,
   MJMan <mjman@ibm.nospam> said:
+-----
| Timur Tabi wrote:
| > The 68000 is 32-bit.  All of the registers, both data and address, are
| > 32-bit.
| Seriously? I had always thought the 68000 was a 16 bit chip. The Amiga and
+--->8

I could use Timur's argument to claim the Z80 was 16-bit, with a quibble about
the AF register....  But registers aren't the whole story.

The 68000 had 32-bit internal address and data, 24-bit external address, and
IIRC 16-bit external data.  The easiest way to deal with it was as a 16-bit
processor, although you could treat it as a 32-bit processor if you were
careful about the upper 8 address bits.  Early 68000 software used it as a
16-bit processor, later software generally ("pay no attention to that
TRSDOS-12 behind the curtain" --- nobody else did :-) used it as a 32-bit
processor.

-- 
brandon s. allbery                  [Team OS/2]             bsa@void.apk.net
cleveland, ohio               mr/2 ice's "rfc guru" :-)          FORZA CREW!
(APK spam kill&log system now in use:  change "void" to "kf8nh" to mail me.)

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From: bsa@void.apk.net (Brandon S. Allbery KF8NH; to reply, change "void" to "kf8nh")
Subject: Re: BOOK: OS/2 Warp Unleashed, 4th Edition cancelled
Date: 1997/08/12
Message-ID: <33f0551b$1$ofn$mr2ice@speaker.kf8nh.apk.net>
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