19 Dec
2018
19 Dec
'18
5:18 p.m.
On 12/19/18 7:41 AM, Ethan via cctalk wrote:
For what it's worth, I've never seen an ISA to USB or ISA to PCI
"bridge" implementation that was fully functional--and that includes P4
and later motherboards using a bridge chip. I've been round the block
with a couple of motherboard vendors.
Some leave out legacy DMA support; others are so incomplete that the
legacy drivers don't even see the ISA card in question or that the
memory space isn't accurately mapped.
Using an ATMega to access a 16-bit ISA board with full DMA, interrupt
and local ROM seems to be a bit beyond the MCU's capabilities.
I'll be happy to be proved wrong.
--Chuck
Really? Show
me one that is 1) in current production, 2) offers the
full ISA bus (not just some decoded address lines and 8 data lines),
3) plugs into a PCI slot.
Christian
Surprised no one has used something like an ATMega or cheap USB
connected ARM to build a USB to ISA adapter with tie in to DOSBox or
some other emulator.