Search found 214 matches
- Fri May 03, 2024 5:21 pm
- Forum: Hardware
- Topic: ZX81 External ROM
- Replies: 2
- Views: 779
Re: ZX81 External ROM
That looks cool. I'd could be interested in one of those.
- Fri May 03, 2024 5:03 pm
- Forum: Hardware
- Topic: ZX81 Comp. Mod, no Video
- Replies: 16
- Views: 1025
Re: ZX81 Comp. Mod, no Video
I only suggest this because I've made this mistake. Double-check that you've got the transistor wired the correct way around. (I was amazed at how well the circuit works when I finally discovered my flub.)
- Wed Jan 24, 2024 2:07 pm
- Forum: Hardware
- Topic: Preferred SD Card for ZXpand+
- Replies: 5
- Views: 835
Re: Preferred SD Card for ZXpand+
I can think of one thing it definitely might be,... there are "fake" memory devices (SD cards, thumbdrives) floating around out there, particularly on fleaBay. The memory addresses are "wrapped", i.e. later addresses point to the same actual locations as early previous addresses. The device will rep...
- Mon Jan 15, 2024 5:33 am
- Forum: Hardware
- Topic: First zeddy done
- Replies: 3
- Views: 1076
Re: First zeddy done
Yes indeed--congratulations! (I would have killed for that handsome real keyboard back in the day,...)
- Wed Jan 03, 2024 2:14 pm
- Forum: Hardware
- Topic: First zeddy boots but....
- Replies: 19
- Views: 2664
Re: First zeddy boots but....
Another use of the 48-64K area I just remembered. My "model" program contains a routine called FLASHOUT, which copies in its entirety the normal 16-32K program area to the higher one. Why? Sometimes during development, programs crash. (I know I know,... this may come as a shock,...) Murphy's Law dic...
- Wed Dec 27, 2023 3:58 am
- Forum: Hardware
- Topic: First zeddy boots but....
- Replies: 19
- Views: 2664
Re: First zeddy boots but....
BUT... I'm reading about Hi-Res graphics... and ... well... if there's going to be no real benefit, then I won't and stick at the 16K... but I'd be interested to hear thoughts please. For what it's worth (maybe not a lot), here's what I did with the 2nd non-contiguous 16K of the 32K version of the ...
- Thu Nov 09, 2023 8:16 am
- Forum: ZX BASIC
- Topic: Tiny Basic for the ZX81
- Replies: 3
- Views: 6287
Re: Tiny Basic for the ZX81
I'm not qualified to answer your question, having shamefully never opened Z80 assembly. But I will follow this thread with interest for another reason. Tiny BASIC intrigues me because I have a Sanyo PHC-20, which is a rare bird natively housing only an "extended" version of Tiny BASIC. I find it qui...
- Sat Sep 30, 2023 5:48 pm
- Forum: Hardware
- Topic: Power Supply switching between ZX81 & Speccy
- Replies: 34
- Views: 26772
Re: Power Supply switching between ZX81 & Speccy
Oh yeah ? I bet my PCs could beat up your PCs,... :lol: 7 towers, 8 laptops, and a few vintage "luggables" in my collection. Only 1 tablet that doesn't work worth spit so I hate using it. Could be the chicken; could be the egg, there. Never got the knack of hunt/peck or typing with my thumbs. If I h...
- Fri May 26, 2023 12:51 am
- Forum: Sinclair Misc
- Topic: Ian buys a (sort of) Zeddy,... Timex-Sinclair 2068
- Replies: 7
- Views: 7216
Re: Ian buys a (sort of) Zeddy,... Timex-Sinclair 2068
I've seen that cartridge on fleaBay, and may spring for one eventually. I do have one working ZX Spectrum 48K, but it's always nice to have "a spare", or at least a way to parallel it. The Spectrum was never very popular over here, so they're somewhat hard to come by.
- Fri May 26, 2023 12:46 am
- Forum: Development
- Topic: ULA 'TAPE IN' Expected Voltages?
- Replies: 21
- Views: 3565
Re: ULA 'TAPE IN' Expected Voltages?
This discussion reminds me of the last meeting of our retro computer club. Several of us brought in ZX81/TS1000's, and many reported that they couldn't load or save programs. Ever. The "solution" in these cases turned out to be embarrassingly simple. The fellows felt intuitively that the "Mic" port ...