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Accelerator stuck wide open while car is going fast: what should
On Mon, 30 Jul 2018 12:40:44 +0100
charles wrote: In article , wrote: On Mon, 30 Jul 2018 10:13:44 +0100 charles wrote: In article , wrote: On Sun, 29 Jul 2018 16:39:18 +0100 TMS320 wrote: On 29/07/18 09:16, wrote: I assumed ABS systems had always been microcontroller controlled, didn't realise there were analogue versions. Interesting to know. The electronics industry didn't make a quantum leap from analogue to microcontroller. There was an intervening period with boards full of logic chips, plenty of which would have been part analogue, such as monostables. Then, not all of it could instantly be mopped up by micros. I suppose in theory there's little you can do in software that you couldn't hardwire in TTL, The original Ceefax decoders were in 2 x 3U racks - all TTL. It all got into one dedicated chip/ Was that chip stil hard wired or did it use software by then? The problem with hardwiring is if you find a bug its a LOT harder and more expensive to fix (if its even possible without a redesign) than just updating the ROM code in subseqent batches. I think Mullard got it right. I've no idea what you're talking about. |
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