I've poked around a bit and found piccies of a couple of 601 Upgrade Cards listed under NuBus Accelerators over on Applefritter.
http://www.applefritter.com/taxonomy/term/120,116
I haven't counted pins yet, but would these be PPC upgrade cards for the IIci PDS?
That 160 pin QFP ARM-ASIC from 1993 looks to be very much like the 1995 PBX ASIC from TI on the 2300c MoBo. PBX is a 240 pin QFP, which leads me to think that the data/address buses of the PPC601 and 603e may have differed (doubled?) during the intervening years.
Comments? I'm just spitballing here, no time for any serious research ATM.
How's my guesswork so far?
http://www.applefritter.com/taxonomy/term/120,116
I haven't counted pins yet, but would these be PPC upgrade cards for the IIci PDS?
That 160 pin QFP ARM-ASIC from 1993 looks to be very much like the 1995 PBX ASIC from TI on the 2300c MoBo. PBX is a 240 pin QFP, which leads me to think that the data/address buses of the PPC601 and 603e may have differed (doubled?) during the intervening years.
Comments? I'm just spitballing here, no time for any serious research ATM.
How's my guesswork so far?