Or rather di_position(), sorry André Am 5. Dezember 2019 07:15:11 schrieb André Fachat <afachat_at_gmx.de>: > Maybe have a look at di_rel_navigate() in > https://github.com/fachat/XD2031/blob/master/pcserver/handler/di_provider.c. > It's extremely tested with many test cases against (true drive simulated) > real Commodore DOS. > > André > > Am 5. Dezember 2019 03:35:00 schrieb Scott Hutter <scott.hutter_at_gmail.com>: >> Thanks Jim – Ive seen this article before. But what I don’t understand is, >> for instance – when would a seek result in reading (in the super side >> sector) from group 2? Or 3? All that the directory entry itself provides >> is the track and sector of the initial super side sector block. (Clearly >> Im missing something). Thanks! >> >> Scott >> >> >> Sent from Mail for Windows 10 >> >> From: Jim Brain >> Sent: Wednesday, December 4, 2019 7:14 PM >> To: cbm-hackers_at_musoftware.de >> Subject: Re: Fwd: Hey guys, Im trying to follow the chain from 1581 super >> side sector to a record. Can someone help me understand the calculation >> involved? >> >> On 12/4/2019 6:08 PM, Julian Perry wrote: >> If it's anything like the 1540/8050/8250 behaviour, your best bet is to >> read up on Inside Commodore DOS, by Immers and Neufield. >> It's not very much like the smaller drives. The 8050/8250 might be >> similar, not sure. >> But, definitely not the 1541/204/3040/4040/2031. >> >> The 1581 uses "super side sectors", explained here: >> http://www.unusedino.de/ec64/technical/formats/d81.htmlReceived on 2020-05-29 23:40:53
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