15 Apr
2013
15 Apr
'13
5:32 a.m.
On 15 April 2013 13:09, Tom Sparks <tom_a_sparks at yahoo.com.au> wrote:
apple inc has made thetransition through a group of cpus then there is hope
(6502 -> 68k -> PPC -> intel)
That is not quite fair. There was no connection, hardware or software,
between Apple's 6502 line and its later 68000 lines.
Apple had about 5 desktop product lines:
Apple I (was there any Apple 2 compatibility there?)
Apple II -> IIgs (6502 -> 65816)
Apple III (not forward or backwards compatible with anything else, was it?)
Apple Lisa
Apple Mac (68K -> PowerPC -> x86)
Plus the Workgroup Servers, some of which were essentially IBM
RS/6000s and couldn't run any form of MacOS).
Then there are its multiple ARM lines:
Newton
iPhone/iPad
And the AppleTV which has gone from x86 to ARM.
So, yes, 3-step migration, but no 4-step one.
--
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