Search results

Working with *roff isn't that bad, but... I have a package where I used to distribute a man page with source, and a text file based on the man page with some (non-*nix) binary builds. As part of my Markdown mania, I switched them around, and now I build the man page with md2man-roff (after...

As long as you're soldering, you might want to consider a mod to put 16K RAM directly onto the motherboard, as a single chip. e.g. http://blog.tynemouthsoftware.co.uk/2017/10/zx81-internal-16k-ram-reversible-version.html

I recently tried to do some video capture (from an old VHS tape rather than a Model I, but anyway) for the first time in years. I had a couple of old capture devices similar to the OP's, and I couldn't get a capture worth a damn from either of them. (They DID work back when I bought them.) It...

Composite. Although, since it's monochrome, I guess it should be equivalent to the Y in YPbPr component. (Yes, these terms are often confused. Both are valid types of video output.) The monitor connector on the Model I carries both composite and 5V, to drive the opto-isolator of the (U.S.?)...

I wouldn't say "completely incompatible". The compatibility depends on the degree to which the Spectrum software relies on the addresses of ROM routines... which, honestly, I'd have expected to be low to nonexistent for the average machine code program, since the ROM is mostly a BASIC...

Eh, not what most people would think of as a tablet. I put it in the same category as a TRS-80 Model 100, slightly smaller and lighter, but functionally similar.

If you do the composite mod, it would be hard to beat a Commodore 1084s. It will also accept split luma/chroma (like s-video, but via two RCA jacks), analog RGB (compatible with Amiga and probably the CoCo 3), and digital RGB (compatible with CGA), as well as stereo sound. There's also a...

2038 no longer seems so far off...

Yes, it should work with a standard CGA monitor. (The famous Tandy 1000 graphics were CGA hi-res with the full 16 colors, but the difference was on the computer end, not in the monitor.)

Were the Model 4's painted originally? I know the 3's were, but I thought the 4's were just white plastic.

Link?

An old VCR should work as a demodulator, if nothing else.

P.S. The Model I doesn't use RF to interface with its monitor, either (it uses composite, plus a separate 5V line). It just happens to be sensitive to / generative of RF interference, unintentionally. Among the TRS-80s, only the CoCos have actual RF outputs, AFAIK.

"Now"? It's always been regulated. The RF modulators of the late 20th century were allowed because they were very low power, and were (supposed to be) connected by cables that didn't leak RF. But yes, you can trivially turn any of them into short-range broadcast stations -- just run the output...

So, I have this Samsung plasma TV from 2004, 42", resolution 853x480 ("Enhanced Definition"). The internal sound circuitry is dead (I use it with a soundbar), it's got sometimes-visible burn-in of the letterbox area (outside the central 4:3), and of course it only has an NTSC tuner, along with...

Does it happen if I post an intro? I guess I'll do that, then. :) Been computing since '81 or so, still have some fondness for some of the machines of that era. The "home computer" era, before the crash -- and before the dominance of PC compatibles. My fave is Sinclair, although I see there's...

Are these worth anything?

Hello all, I have a Model I monitor with no corresponding computer, so I thought I might like to use it as a composite monitor. Has anyone done this? I've only found references to people using regular composite monitors with the Model I, not the other way around. I know that it needs a 5V...