On 2002-11-29 18:13, "Michael J. Hu=DFmann" <michael_at_michael-hussmann.de>
wrote:
> Martin Joseph (marty_at_barknaturalpet.com) wrote:
>=20
>> So he forced the engineers to retrofit the PPC onto the existing
>> designs. This was majorly dumb since the PPC 601 was really a 32
>> bit(64 internal 32bit bus) design and the existing 68k based mobos were
>> 16bit (32internal).
>=20
> The 68000 was 16 bit internal/32 bit external, but the 68020, 68030, and
> 68040 were 32 bit external, no?
Yes. The family is as follows:
68008: 8-bit external data bus, 20-bit external address bus
68000: 16-bit external data bus, 24-bit external address bus
68010: 16-bit external data bus, 24-bit external address bus (pin-compatibl=
e
w/68000)
68020: 32-bit external data and address buses.
68030: 32-bit external data and address buses.
68040: 32-bit external data and address buses.
68060: 32-bit external data and address buses.
All 68K CPUs are 32-bit internally.
,xtG
.tsooJ
--=20
Joost van de Griek
http://www.jvdg.net/
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