There is also a Spectrum emulator for the PicoCalc. I have not downloaded it yet, mainly because not being very interested in arcade-type games, I tended to be more interested in the ZX-80/81, but haven't seen any PicoCalc emulators for that. It seems that most emulator writers are more interested in games. That said, I am still going over my RunCPM system (which does run on a Pico with only an SD card socket attached.) There are lots of Z-80 tools (assembly and above) for that thing.

Also, related to this: Brian (AKA @MicroNut) has (had?) a ZX-81 remake. He brought it to a retro-computing show that I put on at our local library. If I remember right, he had a digital "cassette tape" system that connected to the Sinclair's tape interface. Maybe he can give some information about his system.

Quote from: Chris Savage on Jan 12, 2026, 12:00 PM

Quote from: JKnightandKARR on Jan 12, 2026, 11:26 AMSo far no Android apps other then the Speccy and Speccy+, both Spectrum, but there are options available for Windows for the 80/81.

Just to confirm, you're looking for something (emulator) you can practice / learn Z80 assembly on, yes?

P.S. - I must admit...just talking about this is making me extremely antsy about reviving my Z80 Retro Computer project, which I hadn't gotten very far in.

Yes, I have a ZX Spectrum emulator on my tablet right now, just trying to figure out how to use it, as I have no documentation to look at, but there's multiple versions to pick from such as Spectrum 16k, 48k or 128k among other options. 12 diff versions total and 2 keyboards the 48k ver and the 128k ver.

Quote from: JKnightandKARR on Jan 12, 2026, 11:26 AMSo far no Android apps other then the Speccy and Speccy+, both Spectrum, but there are options available for Windows for the 80/81.

Just to confirm, you're looking for something (emulator) you can practice / learn Z80 assembly on, yes?

P.S. - I must admit...just talking about this is making me extremely antsy about reviving my Z80 Retro Computer project, which I hadn't gotten very far in.

Quote from: granz on Jan 12, 2026, 07:52 AM

Quote from: Chris Savage on Jan 11, 2026, 10:03 PM

Quote from: granz on Jan 11, 2026, 09:03 PMYeah, that is the biggest issue with Sinclair emulators - the unusual keyboard. I like your idea of taking an old keyboard, and pasting TS-1000/Z-81 stickers on to the keys to dedicate to TS-1000 emulation.

Same thing with Commodore computers...non-standard keyboards.

Yes, although, if you do not need the graphics (I.E. if you are using the C=>64 emulator just for "business-type" programs, or other) then you can ignore the graphics and use a regular PS/2, or USB, keyboard as is. Without the BASIC keywords which are printed on the Sinclair keyboard, it is very difficult to do any programming.

I have a BlueTooth keyboard for my tablet, so if I can figure out what I did with it, I can use that for this.

Quote from: Chris Savage on Jan 12, 2026, 09:43 AM

Quote from: granz on Jan 12, 2026, 07:52 AMYes, although, if you do not need the graphics (I.E. if you are using the C=>64 emulator just for "business-type" programs, or other) then you can ignore the graphics and use a regular PS/2, or USB, keyboard as is. Without the BASIC keywords which are printed on the Sinclair keyboard, it is very difficult to do any programming.

Gotcha. It's kind of crazy but, despite my love for the Z80, I was never able to obtain a ZX80 / ZX81, so I have zero experience with them. 

So far no Android apps other then the Speccy and Speccy+, both Spectrum, but there are options available for Windows for the 80/81.

I know I posted photos of the Piggy Bank, but if you were wondering how this model is also a Box / Pen Holder / Vase, see the second print profile in the link. It has four (4) different lids you can print (all four are on the same plate and print together). So I printed that plate and then four additional bases, so now I have the complete set (and an extra bank).

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Quote from: granz on Jan 12, 2026, 07:52 AMYes, although, if you do not need the graphics (I.E. if you are using the C=>64 emulator just for "business-type" programs, or other) then you can ignore the graphics and use a regular PS/2, or USB, keyboard as is. Without the BASIC keywords which are printed on the Sinclair keyboard, it is very difficult to do any programming.

Gotcha. It's kind of crazy but, despite my love for the Z80, I was never able to obtain a ZX80 / ZX81, so I have zero experience with them. 

Quote from: JKnightandKARR on Jan 11, 2026, 11:31 PMI haven't had the time to mess with it, work been sucky n I'm too tired to care about anything at the moment... but will do it soon.

No problem. I understand. It's just that, while we are exploring alternative options for you on the Z80 front, I would like to see you get this classic (vintage) computer working, if possible.

Quote from: Chris Savage on Jan 11, 2026, 10:03 PM

Quote from: granz on Jan 11, 2026, 09:03 PMYeah, that is the biggest issue with Sinclair emulators - the unusual keyboard. I like your idea of taking an old keyboard, and pasting TS-1000/Z-81 stickers on to the keys to dedicate to TS-1000 emulation.

Same thing with Commodore computers...non-standard keyboards.

Yes, although, if you do not need the graphics (I.E. if you are using the C=>64 emulator just for "business-type" programs, or other) then you can ignore the graphics and use a regular PS/2, or USB, keyboard as is. Without the BASIC keywords which are printed on the Sinclair keyboard, it is very difficult to do any programming.

Quote from: granz on Jan 11, 2026, 09:03 PM

Quote from: JKnightandKARR on Jan 11, 2026, 02:33 PMI found a ZX Spectrum emulator on Android store, will mess with it, probly need to use my tablet or see if I can get my late mom's boyfriend's old Chrome laptop n set it up with stickers on the keys.

Yeah, that is the biggest issue with Sinclair emulators - the unusual keyboard. I like your idea of taking an old keyboard, and pasting TS-1000/Z-81 stickers on to the keys to dedicate to TS-1000 emulation.

Quote from: Chris Savage on Jan 11, 2026, 10:03 PM

Quote from: granz on Jan 11, 2026, 09:03 PMYeah, that is the biggest issue with Sinclair emulators - the unusual keyboard. I like your idea of taking an old keyboard, and pasting TS-1000/Z-81 stickers on to the keys to dedicate to TS-1000 emulation.

Same thing with Commodore computers...non-standard keyboards.

In this case it's a Google Chromebook laptop, so to me not real useful for anything else... lol, but I DID install Speccy on my Tablet. Has 2 keyboard overlays on the screen I can pick from and multiple Spectrum's to try, I just need to figure out the Spectrum 128 keyboard/system, I can type something like PRINT, but I can't figure out the 1 button of adding said function, but I did get Print "Hello" to work lol

https://lh3.ggpht.com/mX0ZYWW3Q08tdm9Nj--tjFxprVfMzg2jE_riOKzBDldW56zOK3nB_pms8F8blKYGwg=h900