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The terrible not-release of the Z800 really put a nail in CP/M's coffin I think. PCs were in the right place at the right time to pick up the ball that Zilog and DR dropped.

I used an old scsi enclosure for mine. All the scsi stuff still in there, so easy to convert back for the next guy. It had some knockouts in the back for audio connectors (I assume), so I just punched one of those out and hot glued the 'weazle in there.

I think there were two different keyboards. One may have been rubber dome? I can't remember. One of the more serious Tandy guys will chime in I am sure.

The switches go bad sometimes. They can be taken apart and cleaned, although it's kind of a pita. I think I'd try a bunch of deoxit and some exercise before I went to all that trouble, especially if it's only one key that's bad.

Be there or be square! It's a great show, and a great community! (This message brought to you by Heathkit Gang!)

If your CPU isn't running right, it's probably never getting to the instruction that polls the keyboard port and triggers the wait state generator. I am sorry to keep beating the proverbial dead horse, but you have verified that the CPU is resetting correctly at power-up, right? It's unclear...

No, wait a minute. I am full of crap. It looks like the firmware reads a port when it wants to write to video memory. That read sets one of the latches in U428, and then then next vertical sync pulse generates a single NMI and resets those latches. So I don't think we should be seeing a ton...

I still don't understand why M1 isn't running though. Even if it's in some kind of interrupt handler loop, it ought to be asserting M1 every time it starts a new instruction, right? On the schematic I am looking at, M1 isn't even connected to anything, though, so there shouldn't be anything on...

If we're talking about the z80 on the terminal board (not the one on the cpu board), I am 95% sure that one of the interrupts is used to signal the CPU when it's safe to write to video ram without causing display artifacts (even though with the stock rom it has display artifacts anyway, lol). I...

I think NMI may be connected to the vertical blanking interval, but I don't remember for sure. It's in the manual, but I'm not in a place where I can check it atm.

I haven't cracked open my 171 yet, but I'll try to remember to dump the roms and post them for you when I do.

That is HOT.

One of the guys on SEBHC has made a modern case, but it doesn't follow the design cues of the original. Aside from the louvers in the top cover, it looks like most of it could be done on a simple manual brake, to me. Maybe even an improvised one.That really sharp bend for the foot in the front...

Does it have a hard sector controller? It's impossible to get hard sector floppies nowadays. You may have to get a virtual sector generator to be able to use regular soft sector floppies. I'm not sure how to go about writing the initial soft sector boot media through the VSG on another...

I haven't seen any pop up for sale for a good while, and they are *really* expensive for what they are when they do. :( If you have the desire/skills to build an enclosure and solder all the boards, the guys at SEBHC have made clones of all the boards. I too was obsessed and had to have one...

I was thinking about trying to lay out my own with mini-LEDs, to fit in the top "half" of a full height 5.25 bay. Then I could use the bottom half for a gotek display and rotary encoder, or something. I dunno. It would be so small and hard to read. I think the ideal solution for me would be...

I am trying to figure out how to put that 5.25 front panel on my H11 without cutting on the case. I guess I'll have to put it in an external enclosure, but I guess that's ok. I have an open space in my H-17 enclosure, but then the whole thing would be sideways. Hmmmmmmmmm.........

DM me when you figure out what it'll cost. I'll keep what I want and pass the rest along on here, unless the shipping is completely nuts. Thanks, bud!

I'll call dibs on that, if nobody else has DMed you first. :P