27 Feb
2024
27 Feb
'24
1:30 p.m.
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:
Anything not APPLE or IBM or DEC or a PI-emulation for a home brew
computer.
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.
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-adapt…
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