I think the 2532 eprom was discontinued long ago.

http://www.sayal.com/ has these in stock.

Or, send me a PM. I have a very spare 2532 eproms from pulls.

Atrai Archives has a couple of machine language books online.

http://www.atariarchives.org/mlb/

However, I prefer hard copy

For many of us, the weather outside is still great - sunshine & high 80s today.

Things will likely pick up in forum when vacations are over , it gets cold out , and there are fewer daylight hours for outside activities .

Yesterday was the first time I burned eproms since early May.

Great project!

Lots of really cool ideas

I also build based on recycled parts

Who was the manufacturer of the Cable Data Terms, and what was the
model # ?
I would love to find one. Can you provide any system details about the
unit such as as onboard RAM/ROM, IO etc ? Date of Manufacture ?



CableData was a firm which provided billing (hardware & software) solutions to ...

I use R6502 (from salvaged from Cable Data terminals) and MOS6502 (salvaged from Vic-20s and C1541/C2031 drives).

I built Eeprom programmer (on perf board) based on schemtic found at Batronix site:

http://www.batronix.com/electronic/circuits/eeprommer.shtml

It is a pretty simple design and I had all the parts in my junk box, so build cost was zero.

It's not a bad little programmer. Only downside is that ...

Once again I'm impressed.

Daryl keeps coming up with such really neat ideas.

Cheers,

Brian

If you can get your hands on a Digital Multimeter with built in logic probe, or even a logic probe by itself, you should be able to check for system clock and activity on address and data bus of 6502.

I really wish I had a good scope (mine was built in 1956 and only has bandwidth to 60khz). However ...

RS232 with 6522 is generally a bad idea.

Just talk to a Commdore Vic-20 owner.

For 16550 design, check out :

http://www.6502.org/users/andre/csa/csaduart.png

Found on page: http://www.6502.org/users/andre/csa/

I haven't tried this out. But it looks like a pretty straight forward interface ...

Great info!

I have a 6501 and have not seen much info about it. It's interesting to learn about some of its background.

For keyboard check out - http://users.softcom.net/darylr/io/pckb6522.html

For monitor check out - http://users.softcom.net/darylr/io/vid3.html

Both projects are from Daryl Rictor's site. His pages are a great source of project ideas.

Interesting stuff!


I'm currently working on CGA controller based on 6545 CRT chip.

In one of the old Micro6502 or 6502 User Notes newsletters there was reference to a "recently released" application note for the 6545 CRT controller chip.

I have not been able to find a scan of this online anywhere.

Does anybody where I may find it?

I wish to use 6545 with the 6502SBC that I ...