sigtau
Well-known member
While I'm aware that the Powerbook edition of the SCSI2SD does indeed exist, they can only be manufactured in limited runs due to their design being in significantly lower demand than your run-of-the-mill SCSI2SD, per a conversation I had with Interial via PM. To this end, I took it upon myself to design a PCB that bridges the pinout of the 40-position SCSI connector (at least, the one I have in my powerbook duo 250) to the pinout of a 50-position SCSI ribbon connector, for cases where you may have a v5 board on hand or if you need to test the SCSI header on the board without having to wait for the next run of PB SCSI2SD boards. I used this link (page 12) to derive the pinout, and then just found various SCSI-50 pinouts online.
Correct me if I'm wrong, but the SCSI2SD boards derive power either from the molex connectors or from the TERMPWR pin on the ribbon cable, so for this project, I left the motor control +5VDC and other voltage sources disconnected, and only pass TERMPWR.
Here is the board design. I'm ordering a test board to try it out and see if anything fries.
Note: If you try to hook up a mechanical drive to this, you'll need an external power source and there is also no guarantee it will actually work as I'm not supporting that. This board is dimensionally sized to work with a 2.54mm pitch female IDC-50 header and a male 40-pin header pitched at 2mm.
If I can get it to work, I'll upload the gerber files to github and release it into the wild for you guys to play with.
Correct me if I'm wrong, but the SCSI2SD boards derive power either from the molex connectors or from the TERMPWR pin on the ribbon cable, so for this project, I left the motor control +5VDC and other voltage sources disconnected, and only pass TERMPWR.
Here is the board design. I'm ordering a test board to try it out and see if anything fries.
Note: If you try to hook up a mechanical drive to this, you'll need an external power source and there is also no guarantee it will actually work as I'm not supporting that. This board is dimensionally sized to work with a 2.54mm pitch female IDC-50 header and a male 40-pin header pitched at 2mm.
If I can get it to work, I'll upload the gerber files to github and release it into the wild for you guys to play with.