REPAIR FLOPPY DISKS. REPAIR FLOPPY
Repair Floppy Disks. Vinyl Tarp Repair. Repair Floppy Disks
Apple A9M0106 800k External Floppy Drive Connectors I use this 800k drive with a Mac 512k that has the original 64k ROMs. Pins 9 (-12v) and 20 (speed) are disconnected for compatibility because my Mac's internal floppy drive is still 400k (see pages 193 and 194 of Larry Pina's Macintosh Repair & Upgrade Secrets book). This external 800k drive works well except for one odd problem. The red LED on the floppy drive lights up every 2 seconds when no disks are in the drives (at boot time). The Mac seems to scan the drive continually until a disk is inserted (I can hear a small motor noise from the drive every 2 seconds when the LED flashes). This seems odd since that 800k drive is supposed to be supported by the Mac 512k. I am aware of the HD20 init, but that is only required to read/write 800k disks. Once I boot the Mac, I can read/write 400k disks in this 800k drive without any init installed. 800k disks, of course, only work with the HD20 init. I believe this to simply be a minor incompatibility with this drive and the 64k ROMs, as opposed to a unique problem specific to my external drive alone. The drive mechanism is a red-labeled SONY MFD-51W-03. Voltages at the 800k drive connector measured 4.75v~4.78v, and 11.99v. old computer/tech stuff Found while going through papers from the last 10 years of my life. I think the yellow receipt at the top is for my Packard Bell computer, which I bought in 1996.. The white receipt is a work order to repair the com ports when the 28.8 dial-up modem stopped working in 1998. Somehow, The smaller white receipt is for my first digital camera, the Sony Mavica that used a floppy disk. I still had a floppy disk. See also: ceiling fan motor repair online repair manual mobile phones repairs how to repair plastic radiator transmission repair service phone repair guide repair credit software error fix advanced registry repair serial server 2003 registry repair spot paint repair |
studeni, 2011 | ||||||
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