tms9995
Experienced Member
I've got the complete internal logic for the 74LS2001--just not a bullet-proof identification of which pin each of those signals need to reside on. Some of it isn't used on the Cortex, which is why I was hoping someone had the signal listing for what belonged on which pin on the chip. With the signal name to actually designated pin position, I can design and program a true replacement for it. . .and then it will be around again. As a side note, there appear to be about 300 of them somewhere in Poland, assuming that they really are the same IC. . .I haven't gotten a response yet from the company that says they have them though, so they may be vaporware.
I'm glad you liked the inclusion of the cover. I have the Aug 1984 issue as well, I just need to finish the scans for it. It contains the rest of the Jun 1984 article along with the board layout for the parallel board.
That's interesting you've got the internals. Tony's post of the E-Bus arbiter has a couple of signals missing (TO & TO EN) and you say yours has got more than the Cortex uses. May be there were 'levels' of arbitration, depending upon the system complexity? Anyway, care to post it for reference?