cjs's latest activity

Thanks for that. There are already a couple of scans of the manual up on archive.org, but this one is higher resolution.

You have a pretty big gap between 1982 and 2024. Many of those "new" X16 keywords were in QuickBASIC 35 years ago.

Well, I would call those "computer" stores, not "electronics" stores. The latter makes me think of walls of drawers filled with...

That seems really weird. Can you perhaps just tell it it's a straight .BIN file, give it a starting offset of nnnn:0100h, and let it go...

The small board in the third photo is a stand-alone SBC: it has a crystal resonator for the clock, an 1802 CPU, an NEC D446C 2Kx8 static...

It's a pretty interesting design. Each graphics controller reads from two planes and contributes two bits to the attribute controller...

The colors used in trademarks, etc. may also be protected as part of the trademark. We had to be specific about the color(s) to be used...

Ooops, yes; you're absolutely correct. I left a (binary) zero off the end of my previous calculation somehow. @new_castle_j You should...

Ah, your further explanation clears up a lot, thanks. Well, that's a good sign that the schematic isn't completely different, at least...

Yes, the MZ-80A was part of the whole MZ-xxxx series of computers (which has a rather confusing numbering system), and these may well be...

Well, this is the first we've heard in this thread about a driver, and also the first time we've seen this schematic of mysterious...

In discrete logic, it about doubles the necessary hardware for each register: One latch to keep the written value, one tristate buffer...

Lol. That one has a '245 on it, too.

Write-only ports are quite common in older computers. While I don't know if any ports on the EGA were like this, the TRS-80 Model II's...

The latch, from its positioning and what I can see of the traces near it, looks as if it's likely latching data for the data pins of the...