[vcf-midatlantic] Original Macintosh Architecture Questions

John Heritage john.heritage at gmail.com
Wed Jun 23 20:24:49 UTC 2021

Hey folks --

Two items I'm curious about on the classic (and very original) Apple Macs..

1.  Mac (128kb ,512kb, etc) audio -- was there a custom or off the shelf
sound chip for the audio on the original Mac?  and was it 1 channel / and
was it a custom chip by Apple?  (how did it achieve speech synthesis in

2.  The Macintosh Classic released in 1990 "was about 25% faster than the
original Macs".  This is in line with the Atari ST often being quoted as
faster than a Mac when emulating a Mac via Magic Sac or similar.  What
changed in the architecture to make the Mac Classic (or an ST in emulation)
faster than the original Mac?  Was it faster memory that gave more
availability for CPU usage?  were only certain instructions sped up or was
everything faster?


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