Religion warning: I was a mainframer. Since at any practical budget, they can only be
emulated, for
small computers, I would like pure hardware as much as possible, and what did or could
have existed (no fpga).
What I wish somebody would create is an S-100 card (probably with a raspberry pie daughter
running
simulation for future upgradeability) that, initially emulates a complete Byte-8 or Imsai
computer
including memory and disk images on sdc cards, 24x40 display on an HDMI display and USB
keyboard.
serial and parallel ports emulated.
software upgrades could be:
-- a full web page with clickable front panels and ascii terminals.
-- support other CPU cards, e.g. 8088, 68000, 6502, etc
but the big thing:
bidirectional ports on all S-100 data lines. go into supervisory mode and define
--this memory range go to the s-100 bus so you can get that old 8k memory card working.
--this io range go to s-100 bus to get the old printer interface, etc going
--eventually down to just the CPU, pull this new card, put in old CPU and you have an
original.
--possibly reverse also, so would be super board emulating memory, disk, etc for an
original CPU card.
AND maybe headers to connect to ribbon cables to do the same functions to recover other
busses:
apple, TRS-80, OSI, unibus, isa, eisa, s-bus
<pre>--Carey</pre>
On 02/27/2024 2:13 PM CST Doug McIntyre via cctalk
<cctalk(a)classiccmp.org> wrote:
On Tue, Feb 27, 2024 at 11:10:34AM -0700, ben via cctalk wrote:
PS: With low cost Chinese PCB's and vintage
parts, why are people not
building real hardware replica's of interesting machines.
But they are..
I can't tell what you'd find interesting since the list is pretty wide.
I've got an Apple I replica board that someday I intend to populate and get running.
You've got the ReAmiga project producing new boards for using up old parts on broken
boards.
https://www.reamiga.info/?page_id=36
One thing that I find interesting (although I'd never do it), is a board to emulate
a 68000 CPU at much higher speeds running barebones emulator on a Raspberry Pi.
Aimed at Amiga A1200 again.
https://wiki.amiga.org/index.php?title=Pistorm32-Lite
I've put together my IMSAI 8080 frontpanel kit, with the CPU emulated on an ESP32.
https://thehighnibble.com/imsai8080/
Or they are about to ship out the PiDP-10 blinkenlights kits
https://obsolescence.dev/pidp10.html
The CPU again emulated on a RaPi, but all new boards and plastic for the console kit
I'm not sure if anybody has ever thought about making flipchip boards themselves
though.
Although they might have been..
https://forum.vcfed.org/index.php?threads/a-general-purpose-flip-chip-adapt…