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SiriusHardware · 10th Aug 2022, 10:34 pm

Thanks Chris, (and Ian, nice to see you around again).

Chris, I note your observation (which has been noted before, I think, by circuitryboy and others) about the similarity between the programming regime for the Tesla devices and the equivalent Texas SN... series devices. That originally gave me some hope that MH74S571s could be programmed by any programmer which supported the SN74S571... but ... Texas seem to have stopped one device lower than that, at the SN74S287. There does not ever seem to have been an SN74S571, so there is no direct Texas equivalent for the 571 which is a pity.

However it does make me wonder if a device programmer which supports the SN74S287 could programme a Tesla MH74S571 in two passes if the MH74S571 was placed in an adaptor which allowed the high address bit to be manually pulled high or low.

I take it the PROMER software runs on an Acorn System 1, which not many people are likely to have. If so, Ian, we still need your alternative based on a more generic, readily available and cheap controller like an Arduino.

10th Aug 2022, 10:34 pm	#3
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,548	Re: Tesla Programmer Thanks Chris, (and Ian, nice to see you around again). Chris, I note your observation (which has been noted before, I think, by circuitryboy and others) about the similarity between the programming regime for the Tesla devices and the equivalent Texas SN... series devices. That originally gave me some hope that MH74S571s could be programmed by any programmer which supported the SN74S571... but ... Texas seem to have stopped one device lower than that, at the SN74S287. There does not ever seem to have been an SN74S571, so there is no direct Texas equivalent for the 571 which is a pity. However it does make me wonder if a device programmer which supports the SN74S287 could programme a Tesla MH74S571 in two passes if the MH74S571 was placed in an adaptor which allowed the high address bit to be manually pulled high or low. I take it the PROMER software runs on an Acorn System 1, which not many people are likely to have. If so, Ian, we still need your alternative based on a more generic, readily available and cheap controller like an Arduino.