On 2024-02-27 1:13 p.m., Doug McIntyre via cctalk 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.
Anything not APPLE or IBM or DEC or a PI-emulation for a home brew
computer.
I've got an Apple I replica board that someday I intend to populate and get
running.
1) Get a good power supply
2) hack in a 6809.
3) get a good power supply.
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/
I had z80/s100 kit once, but the power supply failed taking every thing out.
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 think the PI is too cheap of computer build wise for emulation
of any system. It might blink your lights, but never run 20 users
timesharing.
> 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-adapter-board-worth-doing.1228572/
Small PCB's run at $5 each and PAL 22v10 in each could replace a lot
simple cards.
I would love to see a PDP-8 with 1/2 size flip chips using today's
smaller logic.
A good home brew computer is what I am looking for.
In hindsight I want 18 bit addressing (bytes optional)
and single word memory ref's. Since 2901 alu's are 4
bits wide, 20,24,28 bits are my only option for a COMPUTER
not for digital controller faking it.
Still working on the pro-type stage here.
For test pcb's I have,
good source of Chinese toggle switches with a PCB foot print.
https://www.ebay.ca/itm/143887059040
Hex displays are here.
https://www.ebay.ca/itm/281809099152
