Looking for a cheap SCSI cable for BlizzardPPC
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Looking for a cheap SCSI cable for BlizzardPPC
:thumbsup:
Still looking for !!
You are looking for a 68 Pin SCSI cable right? I have a couple here if that's what you are looking for. If you pay for the shipping I can put one in a shipping packet and send it to you.
Kinda blond (read not up to date to amiga scsi cables) I do seem to have a load of termintators (50/50 centronics 8), and 50db to 68 converterors visa versa. Hail my attic and garage. I can send them for postage cost and a nice postcard if needed, cleans up my attic als.
50-68 conv. or cables or even 68pins terminators I might still have a few left Sorry for 'taking' over this topic
He is looking for this:
http://amigakit.leamancomputing.com/...roducts_id=180
But I suppose it does not fall under the 'cheap' category :)
The controller provides a Single Ended, Fast (10 MHz) Narrow (8 bit) SCSI bus, as defined in the SCSI-2 standard, and the pitch of the pins on the BPPC 50 pin connector is standard high-density miniature SCSI (micro D).
So Cosmos, I think you can hack yourself a cable this way:
A) Get a cheap 68pin microD (female) to 50 pin standard pitch IDC (female) adapter (those without high-byte termination will do just fine, you may already have a couple lying around).
The 68pin high density side is 2 x 34 pins, the SCSI header on the BPPC is 2 x 25 pins. Pins 1-34 and 1-25 respectively are ground (in the 68pin connector a couple of those are defined as Termination Power, but the BPPC SCSI will probably not provide it so it makes no difference. If in doubt, cut them off in step C).
Plug the 68pin female side onto the 50 pin BPPC male header so that pins 1-5 and 35-39 are left unconnected on the one side, and pins 31-34 and 65-68 are left unconnected on the other side. That is, the mapping is: 1-25 on the BPPC header maps to 6-30 on the 68pin side and 26-50 on the BPPC header maps to 40-64 on the 68pin side. This leaves out exactly 18 connections, which just happen to be the totally unneeded upper 8 data bits for the Wide interface + their respective parity bit (=9 lines) along with their matching and equally unneeded GND lines(=another 9 lines).
B) Get 2 rows of standard header pins, 50 pins each. Adjust the plastic base for each pin so it sits in the middle. Plug each row into the 50 pin female IDC side of the adapter you used in A) and the gender has just changed.
C) Now just use your preferred standard 50 wire flat cable, like you would have if the BPPC had a standard IDC connector in the first place.
Total cost = around 5 euros? Maybe you already have everything needed.
<Disclaimer>
I don't own a BPPC so of course this is untested, but hopefully everything will fit mechanically. Electrically you should double check the pinouts and double verify the pin numbers I mention. BLTCON0 does contain a shift register so who knows, I may have slipped a pin or two aside ;) no warranties are offered etc etc but I can say that improper SCSI cabling may indeed harm your equipment.
</Disclaimer>
@administration
If 'hack-it-yourself' advise is considered misplaced in a sales thread, please relocate accordingly.
Best regards
Nikos
PM-ed an idea.
(was posted here but for some reason it didn't appear).
Hope it helps.
Ok, thanks all. But where to find this tiny female connector (50) ?
:roll:
Hmmm seems to be the part where the external db50 connector connects to. Same as on my cs scsi. Can't say i have one off those laying round but will look later today.Quote:
Originally Posted by Cosmos
@cosmos
I nowhere mentioned you will use an exactly matching connector. However maybe you want a cable suitable for a desktop A1200 case installation, while my idea can only work in a tower. Is that the case?
With the internal SCSI cable you can route one end to outside, then use one terminator.