ahh, the HP 9133A - the largest and heaviest external 3 1/2" floppy drive ever built.

[bsdphk@fosstodon.org]

@tubetime

Hmm, i think there's still something not quite right about the interleave: I'm seeing too much 0x6d 0xb6 in places it should not be.

Or maybe there is a bad-block remapping we need to figure out.

[bsdphk@fosstodon.org]

@tubetime

Ok, I think I got it now.

The interleave is:

[0, 9, 18, 27, 4, 13, 22, 8, 17, 26, 3, 12, 21, 30, 7, 16, 25, 2, 11, 20, 29, 6, 15, 24, 1, 10, 19, 28, 5, 14]

I've also added a very rudimentary BASIC-detokenizer (git pull to get it), and updated the output here:

Master Index: HP85 Basic

(phk.freebsd.dk)

(Bedtime in Denmark now

[tubetime@mastodon.social]

huh, i reconnected everything and plugged the drive into my HP85, and it actually works! i can read the files on it.

[tubetime@mastodon.social]

one of the programs.

[tubetime@mastodon.social]

unfortunately the floppy drive isn't quite working. i can't format this new disk. the drive makes a very rattly sound, so it's probably something mechanical.

[tubetime@mastodon.social]

3 1/2" = light mode
5 1/4" = dark mode

[darryl_ramm@hachyderm.io]

@tubetime

Oh pretty HP85. HP and 3M executives never suffered the pain they should have for inflicting those damn DC100A cartridge/drives on users.

[xan@xantronix.social]

@tubetime why do these seem like GPIB devices

[tubetime@mastodon.social]

@darryl_ramm yeah those are awful

[tubetime@mastodon.social]

@xan they are HPIB which is technically not GPIB. but basically yeah.

[xan@xantronix.social]

@tubetime I knew it! They've got that testing equipment physiognomy (I wanted to say HPIB originally but I was honestly expecting to catch heat from somebody saying "WELL ACKSHUALLY" in the other direction)

[darryl_ramm@hachyderm.io]

@tubetime

It's not like they were ever that reliable to start with.

**Insert ad for EBKS multipurpose storage/expansion module for HP80 Series**

EBTKS Overview — EBTKS 1.0 documentation

(www.fliptronics.com)

- YouTube

Auf YouTube findest du die angesagtesten Videos und Tracks. Außerdem kannst du eigene Inhalte hochladen und mit Freunden oder gleich der ganzen Welt teilen.

(www.youtube.com)

Thanks Philip et al. My 85 and 87 have them.

[tubetime@mastodon.social]

@darryl_ramm i have one in this machine.

[bsdphk@fosstodon.org]

@tubetime

Cool!

[lucybarky@floofy.tech]

@tubetime so gorgeous and stunning

[bsdphk@fosstodon.org]

@tubetime

If you have an easy way to accomplish it, can you send me listings of some of the programs, so I can work on the BASIC lister code ?

For instance the "BIORHY" program, which I suspect is a HP demo ?

[tubetime@mastodon.social]

@bsdphk sent you the file in an email.

[bsdphk@fosstodon.org]

@tubetime

Thanks, got it.

[tubetime@mastodon.social]

got some time to take the drive out again and clean it again. i ended up having to remove this entire sliding side plate because there was still some old crusty lubricant. it is much better now. i also lubricated the head stepper worm gear.

[tubetime@mastodon.social]

much better, it actually formats the disk! BTW this 3 1/2" format is very odd. 600 rpm, 66 tracks, 16 sectors per track, single-sided, 270K capacity, 256 byte sectors.