Altair-Duino

Hi, Seems the giant numbers are in Processor Technology FOCAL: https://www.sol20.org/manuals/focal.

Well done and am absolutely in awe of the documented code! Good code to learn from… Cliff On Tuesday,

I finally got the delayed shipment from that distributor in Thief River Falls. (Normally, I order

You have to start it from both sides. Starting it on one side has no mechanism to start the other

Thanks again Chris and David. I missed the original shipment of the floppy drives. mine are homebrew.

Don't neglect the TRS80 Model 4P. That was possibly the pinnacle of TRS80s IMO. Not only luggable

Thanks Tom! I have been able to load 16K basic from switches and run a couple of programs, so all

Problem solved! Loopback test worked. I removed the null modem adapter and attached the serial cable

Problem Solved! FAT32 works fine with the AD 8800. Thanks everyone. I will have a new post soon for

My retro CPU iPhone app is now ready to share Lots of information on your favorite 8-bit and 16-bit

I realized i didn't post tom's benchmark program 10 PRINT CHR$(12) 30 FOR T=2 TO 200 40 TM=T/

I've never seen that and I've used a whole lot of these. Just as a test, power it with 5v

(Note, this is presenting a telnet CLIENT to the Altair; not a telnet server serial port connector

I did see that card, it definitely looks great for debugging and development. I think I'll move

I've been tearing my hair out for several days now trying to figure this out. I don't

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