Favoured processor?

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@jonn_blanchard Z80 processor for it's simplicity and fact that it's still used in devices today. 680X0 for being the huge step forward they were and and the amazing systems they were used in including the Amiga

@ShadowInTheVoid That's much the same as me, I was originally tempted to keep it to 8-bit processors but I couldn't help stick the 68k in

@ShadowInTheVoid well, 8-bit generation, the TMS processors bridging that gap a little

@jonn_blanchard You forced me to choose only one among all of my favorites.

@jonn_blanchard Not much love for the TMS. Obviously not enough TI99'ers have moved over to Mastodon yet.

@jonn_blanchard Current TI99 project is a switchable overclock. Can be controlled by manual switch or under program control. Unfortunately not working yet as I received some dodgy 16mhz resonators.

@GedgeHead One of my favourite machines is the French Exelvision EXL 100, it makes extensive use of TI chips because the designers worked there

@jonn_blanchard My mate, whilst working a summer job at Marconi, evaluated preproduction TMS9900 for use in some of their experimental radar systems.

@jonn_blanchard I first learned machine code/assembly on a Z80 so that is my favourite due to nostalgia, but It enjoyed programming the mc68000 more perhaps.

The TMS9900 was probably the coolest because it was literally a single chip implementation of the TTL chip based CPU card in the TI 990-series minicomputers (TI's rival to the PDP-11). This CPU was first used in the TI 990/4 mini, which is why the home computer using the same chip was called TI 99/4. I guess it was 1/10 as much as it's 990 big brother?

Anyways the TMS900's minicomputer heritage meant it had unique capabilities, such as fast and powerful context switching that could've been used in multiuser and multitasking, and a lot of potential overall. But, it was expensive and complicated relative to the 8 bit CPUs of other home computers, this the 99/4 was such a cost reduced design that it severely hobbled the CPU.

@msh @jonn_blanchard also the TI99/4A (I had one in the 80s) standard BASIC didn't even allow you to get at the memory directly and the expansion modules were way expensive especially here in UK.

I didn't get to do much assembler coding until high school when I had access to BBC Micros with inline assembler, I did do a bit of Z80 coding with a Spectrum with Microdrives and wanted to do gamedev but by that time it was 1988-90 and it was already an obsolete platform..

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