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Test Equipment Anonymous (TEA) group therapy thread
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scl:

--- Quote from: bd139 on June 29, 2022, 01:37:44 pm ---More 465B shenanigans. So I figured I'd just do a short check on the IC and see if it was pin specific. Well it was.  Only the A3 line pin 4 was short to ground which is the CH1 select line.

(snip)


--- End quote ---

74S287A looks to have the same pinout, and I see a datasheet claiming 30ns. Maybe also look at N82S129 and AM27S21.

I don't see any of those in my parts pile, and with postage from the US you are probably still better off finding one in the UK. But, if you can't, I will take another look. If did find one I could program it here too.

AVGresponding:

--- Quote from: mnementh on June 29, 2022, 12:26:00 pm ---The point is it's not the 1980s anymore; floppy is no longer "the convenient choice".

--- End quote ---

It is if you like to play with your Amiga 500 now and again.
AVGresponding:
And speaking of overheating computers, my PC shut down on me an hour or so ago; almost certainly an overheat. It's been a long while since I busted the dust...

I noticed while I was in there that the header tank is only about half full now, so in another 5 years or so, it'll be empty...   :-DD

But, before then, yes, I need to service, or even rebuild the cooling system, mostly because I don't have any blue coolant left and have no plans to buy any just for a PC. I have plenty of red coolant, so I'll use that next time. Can't be arsed/don't want to take the risk of a failed flush, so I'll use all new components. I already have a spare pump with tank, and some silicone tubing left over from last time, so I just need a new radiator, and a new CPU block.

Naturally I shall investigate the old block, to see if it has filled with sludge as per Mnem's insistance.   :popcorn:
bd139:
Ah watercooling. Never had any problems with that here because I never bothered with it  :-DD

Decided after doing a KT decision analysis that the best approach to the 465B is to just buy the fucking IC for £23 and be done with it  :-DD
bd139:

--- Quote from: scl on June 29, 2022, 04:37:56 pm ---
--- Quote from: bd139 on June 29, 2022, 01:37:44 pm ---More 465B shenanigans. So I figured I'd just do a short check on the IC and see if it was pin specific. Well it was.  Only the A3 line pin 4 was short to ground which is the CH1 select line.

(snip)


--- End quote ---

74S287A looks to have the same pinout, and I see a datasheet claiming 30ns. Maybe also look at N82S129 and AM27S21.

I don't see any of those in my parts pile, and with postage from the US you are probably still better off finding one in the UK. But, if you can't, I will take another look. If did find one I could program it here too.

--- End quote ---

Thanks for suggestions. Look at those and they are a good match. But again as always I don't have the programming capability available and that will cost more money and time than just buying the part.
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