Classic-to-USB interface

The CD-ROM connector on sound cards etc you speak about was for particular CD-ROMs only. It was not IDE. A little search on the web found the pinouts for a Mitsumi one as an example. There were standalone cards for CD-ROM drives as well as a lot of the early sound cards integrated some type of CD-ROM connector, eventually moving to an additional IDE. Rather than a thumbdrive or trying to figure out getting USB on an old computer, it's easier to use Compactflash cards and an IDE to CF adapter you can buy everywhere really cheap. Great reuse for the smaller camera memory CF cards laying around everywhere too. I've done this a bunch with older systems, actually last using it to backup data from an old 200Mb hard drive in an old 386. "From http://www.xs4all.nl/~ganswijk/chipdir/oth/mitsumi.txt" I'm making the assumption that this is a Mitsumi Drive. I have only three choices Mitsumi, Panasonic and Sony. Please note, this is NOT an IDE (ATA) interface. All even number pins 2 through 40 are GND. The remaining pins are as follows: Pin Signal 1 Address bit 0 3 Address bit 1 5 No Connection 7 No Connection 9 No Connection 11 No Connection 13 Interrupt 15 Data Request for DMA 17 Data acknowledge for DMA 19 Read enable 21 Write enable 23 Bus enable 25 Data bit 0 27 Data bit 1 29 Data bit 2 31 Data bit 3 33 Data bit 4 35 Data bit 5 37 Data bit 6 "" 39 Data bit 7 Hollandia at ccountry.net wrote: