00:59 <cr1901_modern> Just curious for anyone else in here: Anybody else in here willing to remain "clean" from the Creative 2.0 dump? Possibly to help develop a FOSS firmware that was clean-room RE'd?

02:15 <ej5> going afk for a while, but the creative firmware works fine in the Slurp Burper

05:10 <Lord_Nightmare> the fact that the firmware was finally extracted is super cool

05:11 <Lord_Nightmare> btw, the trick with the laser station and the probe is *EXACTLY* how dr decap extracted the snes DSP-1, DSP-1B, DSP-2, DSP-3 and DSP-4 upd77c25 code

05:11 <Lord_Nightmare> with one added caveat: there was FIB involved to cut the ROM off of the rest of the chip and hard-wire the ROM bus to the CPU as a permanent NOP opcode

05:11 <Lord_Nightmare> then probe the actual ROM bus which was severed

05:12 <Lord_Nightmare> it actually may not have been a NOP but it was some sort of single-cycle non-branching opcode

05:13 <Lord_Nightmare> to be honest it probably didn't require the bus to be hard wired at all except for the top 2 bits which control the opcode type, needed to be wired low

05:13 <Lord_Nightmare> the rest of the bits control what the opcode does (VLIW opcode format) and really don't matter since they increment the PC by 1

05:13 <Lord_Nightmare> and we don't give a flying **** what the cpu actually does, as long as the address bus increments by 1

05:14 <Lord_Nightmare> this was used along with the reset pin to force the address to 0000, and each of the 16 bits were probed and ORed together

05:15 <Lord_Nightmare> for every one of the ROM bits

06:58 <ValleyBell> mangelis: Windows 95 uses the OPL3 patch set from "The FatMan".

06:58 <ValleyBell> (IIRC)

06:59 <ValleyBell> I extracted them from SB16.VDX (Windows 95) and from portcls.sys (Windows 2000/XP) some years ago.

07:00 <ValleyBell> I can look for the dump when I'm back at home.

07:02 <Lord_Nightmare> ah, the fatman, iirc he donated his music disk stuff to some college, and clueless kids trying to recover the data with the wrong sort of macs may have destroyed most of it

07:02 <ValleyBell> awww....

07:02 <Lord_Nightmare> mac 800k disks are apparently not readable in the sort of macs they tried to image them with

07:03 <Lord_Nightmare> if a mac ever asks you to initialize a disk, that means it wants to format it. stupid kids.

07:04 <ValleyBell> https://github.com/bisqwit/adlmidi/blob/master/fm_banks/op3_files/fat2.op3 This should be the patch set used by Win2000 and Createive Labs' Win95 MIDI driver.

07:04 <ValleyBell> though I need to verify that later.

07:04 <ValleyBell> I know it was all 2op patches.

07:15 <mangelis> ValleyBell: the fatman? is that an official name? :D

07:23 <mangelis> but thanks!

07:35 <Lord_Nightmare> https://en.wikipedia.org/wiki/George_Sanger_(musician)

07:38 <Lord_Nightmare> https://blogs.loc.gov/thesignal/2013/08/%E2%99%AB-beep-boop-la-la-la-the-george-sanger-collection-at-ut-austin-videogame-archive/

07:38 <Lord_Nightmare> that collection at ut austin is the one that people may have inadvertently destroyed parts of

07:39 <Lord_Nightmare> "The double-density floppy disks were by far the most difficult to gain access to. They require a special kind of floppy drive but the Center’s archivists did not know that at first. For years, they were thwarted by input/output (I/O) error messages from the double-density floppies and they were convinced that the disks were corrupted. Eventually, through lengthy testing, they concluded that those disks required a specifi

07:39 <Lord_Nightmare> c floppy drive, while the high-density floppies did not." - i could have told the people that in 5 minutes

07:40 <Lord_Nightmare> the best modern way to image 800k gcr mac disks is probably the applesauce device, but i don't know if it really is necessary, since i doubt any of his disks are protected

07:40 <Lord_Nightmare> it would be useful if anything is damaged

07:59 <mangelis> sad

09:13 <cr1901_modern> We have to worry about what we _can_ preserve, rather than what we couldn't I'm afraid :(. It's sad it was botched, but at least there was an _attempt_.

09:17 <mangelis> couple of friends here at .fi also restore old media, they always take raw dumps first and then analyze and fix those

09:17 <mangelis> tapes, disks etc

12:08 <cr1901_modern> Wonder if the laser station is worthwhile to dump the Ym2413

15:43 <Lord_Nightmare> cr1901_modern: laser station would definitely work

15:43 <Lord_Nightmare> but you'd need to do some sleuthing to figure out exactly what clock cycle the internal ROM is reading which samples on

15:44 <Lord_Nightmare> the debug mode with pins d0/d1 as nukeykt documented, probably gives enough information to figure this out