Reply 40 of 50, by orinoko
The PS/2 40 is an ISA machine.
It is... I wonder what they were thinking in the manufacture for this one, possibly an experiment to see how it is taken by the market of the time? Though dropping their own prop bus for the widely used ISA... is not very IBM is it?
I suspect that they needed to have both MCA and ISA in their line of PS/2s simply because the market was predominantly ISA. Getting an ISA based PS/2 meant that people would become familiar with the PS/2 product in general, and IBM was betting that people would simply stick with it and get an MCA based machine next. At least, thats what I've heard over the years...
For what it's worth, both my PS/2 Model 40 and my PS/1 Model 2121 are ISA based. Yay for soundblaster support!