Re: Commodore PLC TIB DD-001 / Drive 2001

From: Steve Gray <*sjgray_at_rogers.com*> Date: Tue, 22 May 2018 20:52:10 +0000 (UTC) Message-ID: <1749529635.4243481.1527022330570@mail.yahoo.com> · sjgray_at_rogers.com

What's wrong with FAT12? It was used for floppy drives so if we're adapting the hardware to another system it'll be fine.Fat16 came out in 1984 and I think the TIB drive was later than that, so you never know. Might be FAT16. I think I'd rather disassemble a known working implementation than to write one from scratch, although there are no guarantees that the code is efficient.
Steve

      From: smf <smf@null.net>
 To: cbm-hackers@musoftware.de 
 Sent: Tuesday, May 22, 2018 3:25 PM
 Subject: Re: Commodore PLC TIB DD-001 / Drive 2001

It's probably be hard coded to fat12, so you'll need to change that.

FAT itself isn't that complex, so if you're going to spend a long time 
reverse engineering it then starting from scratch is probably better.

On 22/05/2018 14:41, Steve Gray wrote:
> I the strength of the PLC TIB drive is that the firmware implements read/write of the FAT file system, making disk interchange much easier. I think it would be cool to adapt this to a CF, or other flash card format. The firmware is 6 to 8K so it'll be a challenge, but I think it would be worth it to disassemble the firmware (on my todo list). After that it might be fairly easy to adapt.