I've always thought the whole Apple / aftermarket RF modulator trick was a bit underhanded.
Acorn wanted to break into the US market, and so they had to redesign the computer with a massive metal box inside the outer plastic case.
Their attempt to launch in the US was a huge failure, and most of those computers were shipped back to the UK and "unconverted" to be resold in their home market.
But they didn't remove the metal box. So Brits could always tell when they had an ex-US BBC Micro because it weighed twice as much and had a huge metal box inside it.
> The solution came in several forms. One way was to embed ferrite balls in the plastic case. Another way was to spray the inside of the case with a metal coating. But the best way was to encase the offending electronics in a small metal box inside the case, which is what was done with the VIC-20. [0]
Why a metal box is the best way, he doesn't say and I don't know. My best guess is that it was more effective/reliable at passing the tests.
[0]: https://archive.org/details/the-home-computer-wars/page/205/...
The TMS9918 would go on to be used in several other game consoles including the Sega SG1000, original MSX, and ColecoVision, in modified form in still more (all Sega consoles up through the Genesis), and inform the design of yet more (Nintendo's PPU). It was one of the first display chips to support sprites as full graphics, rather than a single row of a pixmap which must be reprogrammed every scanline (as Atari's player-missile graphics on the 2600 were).
Speaking of an even weirder hybrid before the hybrids... By 1979 Atari released a BASIC cartridge for the Atari VCS (later renamed Atari 2600): the VCS/2600 was a console. No keyboard. So the BASIC cartridge shipped with the most horrible keyboard ever invented.
So in a way the console themselves were the first hybrid.
Believe, I know: it's how I wrote my very first program ever. It was super simple: basically modifying programs drawing colored lines across the screen.
IIRC -- but I was a kid back then and now I'm nearly the mid 50s -- that BASIC cartdridge's keyboard required to be plugged in both joystick ports.
Oh. The. (128 bytes of RAM) Memories.
Interesting--I always assumed the metal covers (particularly on the old IBMs) were to keep out dust.
> Texas Instruments intended to have total control over the software for its computers, and to reap all of the profits from selling ROM cartridges. Grown arrogant from their long string of consumer products successes (including 1978’s Speak and Spell), TI evidently felt they could dictate the terms for a new category without consideration for the existing, highly-competitive market for personal computers.
They're talking about GROMs here. The 99/4 firmware contains a virtual machine that implements what they call Graphics Programming Language, or GPL. What a search nightmare today!
The idea was that most programmers would be using GPL almost exclusively, and GPL was highly opinionated. The original designers wanted TI to actually build a custom processor just for it, but this was back when it was just a specification and not a design. Cartridges ended up with a non-standard ROM design for technical reasons first.
But ultimately the guy in charge of designing the damn thing intended the GROM requirement to be solving that technical problem first and offering a simplification to devs second. No need to find someone to build your own ROMs, just send us the data and some money!
Source: A five hour interview with Doctor Granville Ott. https://www.youtube.com/watch?v=keWwxWHGKtw
The guy's a good geek.
What the business did, though, is utterly incomprehensible. The company sounds like a complete disaster. No, there was no arrogant strategy. There was no strategy.
I'm currently working on an interview with the other guy on that stage (no, not the youtuber ... he's later) and writing an essay on the 99000.
The slant the article gives the 99/4 is really awful and doesn't seem planted in current knowledge.