It was your work I was referring to in #275. If anyone has a Tesla MH74S287 and a programmer which can natively programme the SN74S287 then it would be great if they could try programming the MH74S287 'as though' it was an SN74S287.
Did you ever complete the conversion of the SOC PROM blower code to the MH... compatible version and compatible hardware which you were pursuing in this thread...?
https://www.vintage-radio.net/forum/...d.php?t=160247
I think you got as far as making a working conversion of the PROM
editor code but we never did hear whether you also did that for the PROM
blower code.