[Coco] "Historic" CD-i development systems...

[KnudsenMJ at aol.com]

In a message dated 3/18/05 7:10:46 PM Eastern Standard Time,  
jdaggett at gate.net writes:

>I  think the MC68340 would be a likely candidate. The only thing that 
>it  lacked over the SCC68070 was the IIC controller.

I remember that I^2C bus -- Philips ws really pushing that for all sorts of  
appliance and TV controls.  It was a good design, but never caught on  (well, 
maybe it did, inside lots of TVs and such).  I don't recall there  even being 
an option on the MM/1 to bring the IIC bus out the back, though it  was 
discussed.  (There were TONS of MM/1 discussions on the Coco List back  then.  And I 
still have The Rainbow issue with the MM/1 on the cover,  swimming in a pile 
of M&Ms (every chocoholic's dream).
 
Anyway, I assume the '340 has all the integrated controllers and times and  
such that the '070 had.

>It  runs at 15 and 25 MHz.


Pretty sure the MM/1 runs at exactly 15.0 MHz, not the TV-related  14.3nn.  
Jazzing it up to 25 would be great, but unclear that the bus,  peripherals, and 
RAM chips would take it.
 
Anyone know how fast Apple got the 68060 to run in the last Macs that used  
68Ks?
--Mike K.