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IBM RT PC experts?

bear

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Mar 28, 2006
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Seattle, WA
Hm, I must have been mistaken about my memory re: it not being generally possible to use an IDE drive. I couldn't find a reference to the details of those reports (I could've sworn it was a FAQ item, but no) when I was originally writing that, and so going off (apparently faulty) memory. Perhaps it was something about an Adaptec ISA SCSI board.
 

MattisLind

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What model 1g drive worked?
I tested with a Seagate ST32140A which worked.
Can you tell what kind of ISA controller it thinks the IDE drive is?
The RT PC Diagnostic prograg detects the controller as an ”IBM Fixed-Disk and Diskette Drive Adapter 1”

There have been lots of CF cards made so who knows how closely the ones you tried match what
the RT expects a supported controller to respond to.

Depending on how far you want to dig into it, you may have to trace the commands going to the
working IDE drive and see how they differ from what happens with the CF

Yes. It could be interesting. We’ll see how much time I find study this. I like to do some more research info IDE and CF in general.
Also, if you have one an ISA card that is only an IDE adapter would be interesting to try.
I tested with two different cards. Both of them Multi IO. One had the UMC UM82C862F chip the other had the GoldStar Prime 2 chip. At this point the only one I tested with the 1 gig Seagate was the UMC chip card. With the 128 Mbyte CF card I tested both and there were no difference in the behaviour. My gut feeling is that the Goldstar chip will work fine with the Seagate. But not tested, though.

I don’t have an IDE only board. Isn’t those that just have a bus buffer chip and not much more?
 
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MattisLind

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Did some further testing of various hard drives.

I successfully formatted, installed VRM, installed AIX and booted the following drives, ST3144A, ST3283A, ST3491A, ST31240A. On the ST3283A the first format attempt failed but the second attempt was ok. Then I also tested a ST3850A which formatted OK, installed VRM on the second attempt and almost installed the OS. At two occasions I had LED blinking C6 02 with this drive. Perhaps the drive is flakey?

I also tested a couple of more modern drives. a 40 Gigabyte Seagate ST340016A and an IBM DJNA-351520. Both hang the VRM installer boot with error code 35 on the LED.

So all in all. Old IDE drives work. Newer do not. CF card do not either. I have no idea why.

I think I figured out why I failed to run the ISA IDE controller as secondary controller. I disabled the floppy but didn't set the floppy to the secondary address. I would guess that the address decoding logic is not taking this into account really. The hard disk is using 3F6/376 port and it was most likely clashing. Will make another test tomorrow with the ESDI controller as the primary controller and the ISA Multi-IO as a secondary IDE only. Floppy and all other peripherals disabled.
 

snuci

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Nov 22, 2012
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Richmond Hill, Ontario, Canada
Just to close it off for me, I have AIX running now after getting a second H310 drive. It initially didn't work but I swapped the board between the two drives and one worked in the end. Formatted, installed AIX and X-Windows and all is good.

IBM_PC_RT_running_AIX (Medium).jpg
 

MattisLind

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Nice!

Did you install all the updates? Did you manage to install NFS and the Distributed Function packages?

Have you seen the files on fsck.technology site? A lot of RT AIX stuff there.

I am using 1 gig out of a Seagate 2 gig IDE drive. Seems to work very well.

I don’t have a 6157 so I have started working on a emulator so that I can install the updates that are bigger than a floppy in size.
 

snuci

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Nice!

Did you install all the updates? Did you manage to install NFS and the Distributed Function packages?
I installed AIX 2.2.1 with updates from Bitsavers here: http://bitsavers.trailing-edge.com/bits/IBM/RT/aix/AIX_RT_2.2.1_w_Upds.zip

IBM PC RT X-Windows was on archive.org here: https://archive.org/details/ibm-pc-rt-x-windows-licensed-program_202101

I only have a token ring card right now so other than installing the TCP/IP stuff, I have not explored NFS or Distributed functions. I need to explore options for ethernet connectivity. How is your set up for this?

I don't have a 6157 either so I'm limited to floppies but I am assuming TCP/IP networking running would solve that issue?

I have the H310 so I think I have some room still.
 

MattisLind

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I also installed the same zip package as you did. But NFS came from fsck.technology site. Unfortunately it refused to install. It claimed that the TCP/IP package or AIX base program had the wrong level. I do have TCP/IP installed though.

I don’t have TCP/IP configured yet (mostly because I have no transceiver around at this moment) but I cannot imagine that I would be unable to install NFS because of the TCP/IP is not configured. But I might be wrong. A lot of things in AIX is a bit strange…

The Distributed Function package installed halway as I recall it but failed when trying to build the kernel. This is the distrib.bz2 package here.

The fsck.technology site has a lot of updates which looks interesting. But many of them are quite big files. It seems that the only way is to install them from a tape cartridge since the updatep program only takes a device-file as an argument. Not a regular file as far as I understand. Therefore my idea of creating a qic-02 emulator. So my impression is that getting TCP/IP wouldn’t help. But I am happy to be proven wrong here. If updatep take a regular file as an argument it would be great! Anyone know for sure?

Regarding uppdates. I have been quite successful applying the package of 12 floppies of corrections in this package: http://bitsavers.trailing-edge.com/bits/IBM/RT/aix/COMPID_56010606103.zip

It took ages to apply though.
 

shirsch

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Joined
Aug 17, 2008
Messages
470
Location
Burlington, VT
I gave away my RT collection years ago, but still have a 6157 tape drive in storage. If anyone is looking for one, please PM. I have no idea whether it's functional, as I was running BSD 4.4 and used an Adaptec 1542 + SCSI tape for backup.
 
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