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| Using CN261 on the A4000T Disk Module | ||
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Description: The disk module on the A4000T has an empty connector, labelled CN261 (A). If you can harvest the pass-through connector from an external floppy drive (B) then you can solder it onto CN261. The new connector will be your DF2: and will face inwards (C). An external floppy drive can then be connected to it (D). You would then have to run that cable out of a backplane slot, but I reckon a sweeter use for this would be a floppy emulator, like what tnt23 is developing ;-) . The slot and screen of that device could then be mounted on a 5.25" front plate on the A4000T bezel. Thanks to PaSha for advice... Picture Stats: Views: 605 Filesize: 245.05kB Height: 768 Width: 1024 Posted by: X-ray at June 12, 2009, 10:20:06 PM Image Linking Codes
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| PaSha Posts:537 
| January 03, 2006, 05:23:43 PM Quote
This means it is also possible to use it as DF1: on the internal ribbon cable on big-box Amigas. Wires 4-6 & 10-12 need to be swapped on the connector for DF1: The Escom hack-PCB can be stuck to the DF0: itself instead of on the disk-board in the A4000T. (the best solution is ofcourse still to junk the Escom drive+PCB hack and install a proper Amiga drive). -Paul |
| tnt23 Posts:195 | January 03, 2006, 03:15:18 PM Sorry about that :-) I cannot find DB23 plugs anywhere BTW. It is always possible to solder a bunch of wires to both emulator and the board instead. Not much progress on my side. Tweaking the code, mostly the subdirectories support and overall performance while I am waiting for the PCB to be ready. New Year holidays in Russia last till 10 of January, so I have plenty of time :-) Another issue is the DRAM chip that is no longer manufactured. I can find samples for as much as $25 per piece, but I'd rather wait for another source to ack their price (10 euros or such). Haven't thought about the price. I hope the new prototype will be ready by the end of the month, then I will be able to at least compile a bill of materials. |
| X-ray Posts:4370
| January 03, 2006, 02:27:52 PM @ tnt23 Ooohhhh, I see. I thought you were making external devices only. But no matter I'm sure there will be a way to connect it to that disk module. How is the progress going, and have you thought of a price for the emulator yet ;-) |
| tnt23 Posts:195 | January 03, 2006, 12:28:37 PM The PCB for my new prototype will be fitted with 34-pin internal floppy bus connector so I could plug it instead of a built-in floppy in A500/A1200, or construct a simple ribbon-to-DB23 cable for external connector. |
| PaSha Posts:537
| January 01, 2006, 12:25:10 PM Yes, CN260 is for a IDC lead. The pinout is dead straight (1=1, 2=2 and so on). What you need to do, is solder a 24-pin header on CN260 (either buy one, or steal one from old dead PC hardware, like a IDE/floppy controller). Then, get a 26-pin (24-pin doesn't seem to exist, 23-pin D-SUBs are slightly oddball and apparently only used by C=) ribbon cable connector (http://www.elfa.se/elfa-bin/setpage.pl?http://www.elfa.se/elfa-bin/dyndok.pl?lang=no&vat=0&dok=145777.htm), some ribbon cable, and either a 23-pin D-SUB from somewhere, or a 25-pin ribbon-cable D-SUB (http://www.elfa.se/elfa-bin/setpage.pl?http://www.elfa.se/elfa-bin/dyndok.pl?lang=no&vat=0&dok=146329.htm) and hacksaw pins 13&25 away. |
| X-ray Posts:4370
| January 01, 2006, 01:43:29 AM Hmmm just noticed I labelled the pics 1-4 instead of A-D. :oops: |
| X-ray Posts:4370
| January 01, 2006, 01:23:08 AM I think that is what PaSha did, but it is more involved than what I did. Plus I don't intend to have an external drive, I am banking on tnt23's emulator as a front bezel plate device and he is making those for external drive ports. Of course the neatest solution (if I wanted an external floppy) would be to cut the ports module in half and use a proper 25-pin D-cutout (one that is currently covered by the SCSI terminator on the ports module). Then you don't waste a backplane/slot space at all. |
| Matt_H Posts:6411 | December 31, 2005, 11:44:08 PM Is CN260 the same thing for an IDC lead? It would be nice to get a pinout for that. Put the connector on a lead and send it out one of the backplane slots... Slightly neater implementation :-) |