![]() It’s still just a few PROMs containing a small program to read and boot sector 0 of a disk, and some discrete logic to control the drive directly, using the computer’s 12V to power the drive motors. (Apple even had a tech info document noting that the older drives could easily be modified to support the new style port) And this card still supports two drives, just via daisy-chaining instead. Despite the 1986-7 copyright silkscreen, it’s almost exactly like the 1978 copyright Disk ][ Interface Card, featuring just one notable difference: the use of a single DB-19 port rather than dual 20-pin connectors. This is an Apple 5.25” Drive Controller Card. The resulting Disk ][ followed Woz’s model. ![]() ![]() The Apple ][ had a perfectly good CPU right there, and if it controlled the floppy drive directly, it wouldn’t need to transfer the data over at all.
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