bernard@prlb23.prlb.philips.be (bernard) (06/14/91)
I 've bought a new internal CDC hard disk for my old Mac II. Very fast, silent compared to the `old' (1987) 40Mb Quantum I had. I've also got a box with alimentation to put my old Quantum in it. The box has a scsi id selector terminated by 2 connectors of 3 wires : the first connector are the common wires and the second carries the "1", "2" and "4" wires that will generate scsi identification of 0 to 7. Well, now the problem : where do I connect these wires to my old Quantum... The Quantum back side has 2 connectors: a big one which is the scsi i/o and a small one made of 2 rows of 8 pins. Maybe these are to be used for scsi id setting ? Can someone send me info on how to use these pins ? The back side of my old Quantum 40Mb looks like this: _________________________________________________________ | HD metal box | | Q250 76-45004 56 alim conn. | | V | | |||| | ========================================================= ......................... ........ ^ ......................... ........ circuit board ^ ^ scsi i/o connector other connector (scsi id setting ??) On the circuit board, there is also a row of 2 * 8 pins for jumpers. There are 2 jumpers put in this row. The row is just below a big squared IC ( OMTI 20508, NCR-0380296...). The part of the board around this row looks like this: board V _______________________________________________ | ____________________ _____________ | | | scsi i/o connector || other conn. | | | -------------------- ------------- | | | | | | ___________ | | | | | | OMTI | | | NCR-... | <- big IC | | | | | | | ----------- | | ::::|::| <- jumpers receiver pins | some of them (|) have jumpers What's the use of these jumpers ? The CDC 3.5 HD is quite silent. So now, the main source of noise in my old Mac II is the fan. Are there more silent fans i could use ? Thanks. Yves Bernard bernard@prlb.philips.be Philips Research Lab, Belgium 4 avenue Einstein 1348 Louvain-La-Neuve