woody@iear.arts.rpi.edu (Christopher Widmann) (10/17/90)
I just found among my piles of PC boards a board about the width and length dimensions of a 5.25" drive. It is labled as a DTC 510X. It has a set of scsi id jumpers, a resistor pack and the 50 pin input and the standard 34pin/2x20pin outs for some sort of ST506 interface. I don't know if it is SCSI to RLL, SCSI to MFM or even how to set it up correctly to work with either an MFM or RLL drive. My WD7000FAST SCSI Exerciser finds a device on the id I set it to, but locks the system up in trying to get its device type and manufacturers code. Does anyone out there is SCSIland have one of these that they are using and can point me in the right direction on what exact interface it is, and how to set some of the jumpers on this card? Please? Thanks. Chris Widmann woody@iear.arts.rpi.edu Chris Widmann --------------------------------------------------------------- woody@iear.arts.rpi.edu - Rensselaer PolyTechniTortureTute "Life is like an ice cream cone, you lick it one day at a time"-Charlie Brown -----------------------------------------------------------------------------
whit@milton.u.washington.edu (John Whitmore) (10/19/90)
In article <NZZ%D_$@rpi.edu> woody@iear.arts.rpi.edu (Christopher Widmann) writes: > > > I just found among my piles of PC boards a board about the width and >length dimensions of a 5.25" drive. It is labled as a DTC 510X. It has a >set of scsi id jumpers, a resistor pack and the 50 pin input and the >standard 34pin/2x20pin outs for some sort of ST506 interface. I'm not sure about the 'X' suffix, but I have some DTC 510B's, and they're not SCSI, they're SASI; you might be locking up your system because the ATN\ line (pin 32) on a SASI controller is ALWAYS grounded (hard-wired). Check with an ohmmeter. Except for the ATN\ wire, the interface is similar to SCSI, and if you're willing to write your own driver, it can be used with a SCSI system. You WILL have to disconnect the wire in the harness leading to that pesky pin 32. The controller is intended for one or two hard disk drives using the ST506/ST412 interface, MFM. Jumpers (DTC 510B)positions designated by letter/number grid marked on board: 4C to 5C labeled 'parity' enables parity on input (parity always enabled on output) 7F to 7E jumpers labeled SECT512 and SECT1024 SECT512 SECT1024 sector size out out 256 in out 512 out in 1024 in in 1024 7E to 8E jumpers for controller ID; connect any one to specify ID Factory settings: Parity IN, sector size 512 Terminator resistor packs located 3F and RP1 Connectors: J6: SASI J1: hard disk control interface (34 pin) J2, J3: hard disk data interface (20 pin) J10: DC power; pin 1 NC, pin 2 GND, pin 3 GND, pin 4 5Vdc, 2.6A If you should require full information, I think DTC is still in business Data Technology Corporation 2775 Northwestern Parkway Santa Clara, CA 95051 (408) 496-0434 John Whitmore