Drive Select
[Greaseweazle F7 only]
Greaseweazle F7 supports Shugart and IBM/PC multi-drive setups.
The read and write commands both accept option --drive N
where N is one of A, B, 0, 1, or 2.
The default is A (IBM/PC Drive A) requiring an IBM/PC drive and a "cable with a twist" (see the explanation below). If your drive fails with a Track 0 not found error, you may have:
- A Shugart drive, strapped for DS0 (pin 10): Connect with straight ribbon and use
--drive 0 - A PC drive being used with a straight cable: Use
--drive b
Two drives may be connected, each with an independent motor-enable line. The Greaseweazle connector acts the same as an IBM/PC motherboard: All PC drives are strapped for drive select on pin 12 (DS1) and motor select on pin 16, and a cable twist is used to differentiate between drives A and B:
- A: Drive connected via a cable with twist on pins 10-16
- B: Drive connected via a straight ribbon cable
A two-drive cable will have connector(s) before and after a twist:
Up to three drives may be connected, with drive-select lines DS0-DS1 on pins 10, 12 and 14 respectively. All drives share a common motor-select signal on pin 16. Drives are addressed by drive identifiers 0, 1, and 2.
Greaseweazle F1 does not support multiple drives and any specified non-default drive letter will be ignored.