KENNER@NYU-CMCL1.ARPA (Richard Kenner) (12/11/85)
It is certainly true that a standard BA11-K has two 32A power supplies for +5V (one for SU #1 and #2 and the other for SU #3-5 -- this is why you can't put a DD11-DK at positions 2-3) and that some (very) old BA11-K's have 25A supplies. However, I thought that the original question was what is the available +5V UNIBUS power for 11/750's. Here the question is more complicated because there isn't a separate supply for the UNIBUS. I think there may be only one +5 suppy for the whole machine but the UNIBUS certainly shares power with things like the UNIBUS adapter, MASSBUS adapter, DR750, etc. A while ago DEC "increased" the amount of UNIBUS +5 power available. They did this by declaring that most sites don't use a DR750 so the power reserved for it could be used for UNIBUS devices. You can also trade off against the RH750 power if you don't have a MASSBUS but the standard DEC configuration rules don't cover this case. This information is rather old so things might have changed in the last few years but I sort of doubt it. Unfortunately, I don't remember the exact numbers. They may well amount to the "standard" 25/32A but, if they do, it's for a different reason. -------