Altair-Duino

run it through the bascom compiler and get 8 times the speed. On Sunday, February 15, 2026 at 12:03:

The AD is an emulator, which interprets the Z80 opcodes. It does not have a fixed speed, the overall

It needed to work this way to be usable on a printing terminal like a teletype. On Saturday, February

Just for anybody who comes across this thread in the future: I made some measurements as to what

See my custom DIY panel. El jue, 5 feb 2026 15:01, Chris Davis <famousd...@gmail.com>

Thank you - feels like I am back on track On Tuesday, February 3, 2026 at 8:20:54 AM UTC-6 famousd...

Great question. On the original Altair 680, the KCACR cassette interface was real hardware, exposed

There is a video on youtube where Dave Plummer compares the speed of an Altair 8800 vs a threadripper

Might not be of any help and it might be out of your wheelhouse, but Vol 1 of Dr Dobbs Journal (1976

Ok. I have solved. I uploaded firmware again but this time, previously I have changed SDFAT library

I've been reading over Mike Douglas excellent reference material for hooking up the 680 to disk

My AD680 did the same thing as Tom's. I small blast of CRC QD cleaner and a few cycles of HLT RUN

I got it to work! I plug in the USB connector to power the 680. Then I set the address switches. Next

https://github.com/davischris/WifiModem On Saturday, January 24, 2026 at 7:43:10 AM UTC-6 Chris Davis

OK, I solved this problem. The system didn't like the supplied SD card! When I copied the files

Close. The original Altair had a board capable of holding four S-100 connectors. You could order one,

Sometimes I turn it on and the third nibble is off, sometimes it's on. It just depends on where

Nice, I want one of those Orton 3C, but am burned out on kit building, I will snag one if an

Thanks! I was sure I'd tried that in my many attempts, but obviously not. It worked. -R On

Yes, it took a while to work out what the configuration was doing, but I thiink I have it set. Worth

Hello Kelly, Thanks so much for your help. Much appreciated..... Kindly, Maurice On Wed, Jan 14, 2026

I installed one tonight, it looks great. Thanks for making this! On Wednesday, December 31, 2025 at 2

I saw your order come through and I thought you might have caved! :) Thanks for the order! On Monday,

SOLUTION: The internal extension was connected to the Native port rather than the Programming port. I

I'll send another card module. On Sunday, January 4, 2026 at 11:54:45 PM UTC-6 data...@gmail.com

I found the problem that was causing this and have fixed it in my Altair8800 GitHub repository. If

I just added a compile-time check to make sure performance optimization is selected when USE_IO_BUS

Oh well, chasing a non problems. Thanks Chris. Beautiful build. Sent from my iPhone 15pm! Charley

I'm not sure what is going wrong but a few things to check: - Triple-check that your serial

never was open source. On Wednesday, December 24, 2025 at 6:32:13 PM UTC-8 Tom Lake wrote: Is this