Email or username:

Password:

Forgot your password?
Tube🍂Time's posts Post Back to profile
Top-level
Tube🍂Time
26 comments
Tube🍂Time

webcache.googleusercontent.com says that i need to copy SF85E4X.BIO to both Install and Disk01. then add "SF85E4X.BIO" to the start of ABIOS.SYS (a text file) on both disks.

1 Dec 2023 at 4:25 | Open on mastodon.social
Tube🍂Time
Tube🍂Time

...but this is umm less promising. "Trap D" is IBM-speak for "General Protection Fault"
1 Dec 2023 at 4:27 | Open on mastodon.social
Tube🍂Time

i have a funny feeling this is a problem with my DBA-ESDI emulator. also it appears to be corrupting sector writes, so i'll need to solve that problem.

1 Dec 2023 at 4:28 | Open on mastodon.social
Tube🍂Time

this is hilarious: the xscreensaver called "bsod" (which i used to use as my screensaver many years ago) has an OS/2 2.0 fake BSOD with many of the same details! same trap address, same BIOS version. wild.
1 Dec 2023 at 15:33 | Open on mastodon.social
/dev/rdsk/c5t1d0s2

@tubetime I remember that screensaver. IIRC the Windows NT version even did hard drive access that made the light come on to simulate writing a crash dump

1 Dec 2023 at 20:09 | Open on aus.social
Infinity
Tube🍂Time

anyway I got new hardware -- this is my version of the device for the 72-pin DBA-ESDI form factor. I've made minor changes to the FPGA bitstream so it can handle this card as well.
2 Dec 2023 at 22:42 | Open on mastodon.social
Tube🍂Time

trying it out in my PS/2 model 50Z. it just plugs right in where the hard drive goes.
2 Dec 2023 at 22:43 | Open on mastodon.social
Tube🍂Time
Tube🍂Time

my DIFDIAG program can see the drive and talk to it, but some functions don't seem to be working. this will take some troubleshooting.
2 Dec 2023 at 22:44 | Open on mastodon.social
Tube🍂Time replied to Tube🍂Time

so there is still data corruption occurring on the Thinkpad. only this time, write operations are affected. it's more or less random but much more frequent than the read issue i fixed earlier.

an old data word is getting counted twice. logic analyzer time. 😑
16 Dec 2023 at 23:44 | Open on mastodon.social
Tube🍂Time replied to Tube🍂Time

this has turned into a very challenging project!

16 Dec 2023 at 23:45 | Open on mastodon.social
Tube🍂Time replied to Tube🍂Time

after connecting the logic analyzer and bringing some internal signals out to pins, it suddenly decides to start working 😅
17 Dec 2023 at 18:29 | Open on mastodon.social
Jernej Simončič � replied to Tube🍂Time
Tube🍂Time replied to Tube🍂Time

the data ready handshaking flag is getting cleared in the wrong spot. test1 is the flag, and the green M1 cursor shows that it is getting cleared even though DMA hasn't started
17 Dec 2023 at 19:05 | Open on mastodon.social
Tube🍂Time replied to Tube🍂Time

i was using a version of the "dma running" signal that was latched on the falling edge of CMD, so it was possible to trigger this clear signal even when DMA wasn't actually in progress.
17 Dec 2023 at 19:08 | Open on mastodon.social
Tube🍂Time replied to Tube🍂Time

after that change, it seems to be passing both the write and the read test loops. i'll run them a bit longer just to make sure.

17 Dec 2023 at 19:09 | Open on mastodon.social
Tube🍂Time replied to Tube🍂Time

i will say that it's the perfect time of year to be running this huge logic analyzer. it puts out a lot of heat!

17 Dec 2023 at 19:11 | Open on mastodon.social
Piersg replied to Tube🍂Time

@tubetime is it Geiger counter on the RAM time? (Apologies if that was the first thing you tried)

17 Dec 2023 at 6:34 | Open on postchat.io
Ian Hanschen

@tubetime I think this might be handy for Sega TeraDrive owners who don't want to waste the 1 free ISA slot on an IDE controller when the ESDI drive dies.

9 Dec 2023 at 17:00 | Open on mastodon.social
Tube🍂Time

@furan teradrive uses a 44-pin interface? maybe IDE but not quite the same? it is not a MCA machine anyway

9 Dec 2023 at 20:08 | Open on mastodon.social
Darryl Ramm

@tubetime Half an operating system. ... I never get tired of that.

1 Dec 2023 at 4:38 | Open on hachyderm.io
Go Up