internal harddrive for 3/60
It is interesting to see that on the mainbaord of a 3/60 there is an empty place for a 3.5" hard disk. There are even holes for the screws, two rows of solder pads for a 50 pin SCSI connector and a solder pad with four holes for a power connector (+5, GND, GND, +12). I placed a Seagate ST31200N hard disk (1 GB) therein and made all necessary connections. The ST31200N has a height of only 1 cm and doesn't become very hot which makes it perfecly suitable for this purpose.
On the left you can see the two rows of the SCSI connector. Between the connector and the NEC 5380 SCSI controller chip there are three termination resisitors. If you want to use an internal disk and external devices, these have to be removed. For greatest flexibility, you should set them on sockets.
by Peter Koch