04-02-2021, 04:52 PM
Thanks Ewan for the confirmation that the BETI will work OK on a Standard Mainboard.
A long while back I looked into the BETI myself and after a long while of pouring through lots of Technical documentation I made some notes for myself and then put the idea aside.
My notes appear to have been based primarily on an Engineering Correction Notice Max Maughan put out back in 1984.
The notes refer to ECN 4-50684 "Modifications for BETI Main and Core boards".
Under the Coreboard mods it says "Parts not fitted IC14, 18, 32, 35, D14. Special Part IC16 82S123 along with a number of other minor parts links and track cuts complete with a diagram showing a resistor, diode capacitor fitting at IC15.
Once I read the part about special part IC16 82S123, that is where I stopped my investigating. I noted that the configuration for a 56k Coreboard looked straight forward.
Anyway as ChickenMan said "this would be worth much more as a B-ETI" it really depends on what Lew is wanting with this unit long term, especially as he has other more conventional units to play with.
Ernest
A long while back I looked into the BETI myself and after a long while of pouring through lots of Technical documentation I made some notes for myself and then put the idea aside.
My notes appear to have been based primarily on an Engineering Correction Notice Max Maughan put out back in 1984.
The notes refer to ECN 4-50684 "Modifications for BETI Main and Core boards".
Under the Coreboard mods it says "Parts not fitted IC14, 18, 32, 35, D14. Special Part IC16 82S123 along with a number of other minor parts links and track cuts complete with a diagram showing a resistor, diode capacitor fitting at IC15.
Once I read the part about special part IC16 82S123, that is where I stopped my investigating. I noted that the configuration for a 56k Coreboard looked straight forward.
Anyway as ChickenMan said "this would be worth much more as a B-ETI" it really depends on what Lew is wanting with this unit long term, especially as he has other more conventional units to play with.
Ernest