<One of the problems with the S100 bus is that it is _very_ dependant on
<the 8080 signals. Even using a Z80 is a bit of work - things like PINTE
<(which indicates if interrupts are enabled) and SSTACK (address lines
Neithrr of which had much application.
<Actually, I prefer the Motorola / PDP11 idea of having memory and I/O in
<the same address space. It means you can use the same instructions and
<addressing modes to access either.
nothing about z80, 8085 or 8088 stops one from doing that. The Northstar*
floppy controller was memory mapped for exactly that reason.
Allison
Received on Mon Mar 29 1999 - 20:09:26 BST