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From: cowan@mercury.ccil.org (John Cowan)
Subject: [TUHS] Bryan Cantrill on bfs & ta
Date: Fri, 19 Oct 2012 16:54:28 -0400	[thread overview]
Message-ID: <20121019205428.GD6410@mercury.ccil.org> (raw)
In-Reply-To: <F4B07803-8CC0-4EF8-9668-878B4CAE0B0E@ccc.com>

Clem Cole scripsit:

> the 68000 and 68010 were 16 bit internals. ie a 16 bit barrel shifter
> and it took 2 ticks to perform 32 bit ops.    a natural int was indeed
> 16 bits in the base registers although they also could be used as
> 32 bit registers (2 ticks ) so some 68k compilers defined int as 16
> others as 32 (more in a minute). it technically was LP32 not ILP32

Sounds like the 8088, which used an 8-bit bus but 16-bit registers
and operations.

-- 
John Cowan <cowan at ccil.org>             http://www.ccil.org/~cowan
Sir, I quite agree with you, but what are we two against so many?
    --George Bernard Shaw,
         to a man booing at the opening of _Arms and the Man_



  reply	other threads:[~2012-10-19 20:54 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-18 22:51 Sevan / Venture37
2012-10-18 23:40 ` Greg 'groggy' Lehey
2012-10-19 20:44   ` Clem Cole
2012-10-19 20:54     ` John Cowan [this message]
2012-10-19 22:13       ` Peter Jeremy
2012-10-22  0:33 ` Larry McVoy
2012-10-22 13:01   ` A. P. Garcia
2012-10-22 13:34     ` Larry McVoy
2012-10-22 14:05       ` A. P. Garcia
2012-10-22 14:13         ` Larry McVoy
2012-10-22 14:17           ` A. P. Garcia

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