Search found 4 matches

by ohverywell
April 1st, 2019, 6:07 pm
Forum: Input/Output
Topic: Memory card alternate sectors?
Replies: 5
Views: 14746

Re: Memory card alternate sectors?

AFAIK, deleting a save involves simply flipping the 'block list information' (allocation state) value on the save's directory entry/ies, and undeletion can be achieved by reversing that, assuming nothing else has written over any of the deleted blocks in the mean time. There is no-where near enough ...
by ohverywell
March 28th, 2019, 7:56 am
Forum: Input/Output
Topic: Memory card alternate sectors?
Replies: 5
Views: 14746

Re: Memory card alternate sectors?

Testing in an emulator with hand-edited memory-card images, i was able to answer a few questions: 1. The alternate-sector feature *is* used, or at least it can be. 2. It *does* work essentially as the documentation describes (put a sector number in the first field of 'alternate information sector 1'...
by ohverywell
March 28th, 2019, 4:29 am
Forum: Input/Output
Topic: Memory card alternate sectors?
Replies: 5
Views: 14746

Re: Memory card alternate sectors?

Maybe. The documentation seems to suggest that it's handled at the file-system level, but there's room for interpretation i'm sure. If it *were* a hardware function, emulators would have to implement it, and none of the ones i've looked at do AFAICT. So i think i should be able to test the theory by...
by ohverywell
March 27th, 2019, 5:22 pm
Forum: Input/Output
Topic: Memory card alternate sectors?
Replies: 5
Views: 14746

Memory card alternate sectors?

Hello, I'm not a regular here, so sorry if i've missed it, but i couldn't find anything in my searches: Does anyone have any information about the alternate-sector area in the FAT block on the memory-card file system? Sony's documentation (File Format 47.pdf) suggests to me that this must be some ki...