27 Apr
2008
27 Apr
'08
10:44 a.m.
I use the introduction of the Peanut as proof that IBM
was still
suffering from the shock of having customers flock to buy the PC. As
they discovered, even the unwashed public had its limits as to what
could be passed off as an IBM product. Or maybe it was just the
result of a drunken bet. You forgot the complete lack of DMA and,
shall we say, "anemic" interrupt handling facility?
I beleive it was possible to add a DMA chip on the expansion bus of the
PCjr. The necessary bus control signals, and even the DRQ and DACK lines
for the floppy controller, are there.
Not that many people did, of course...
-tony