RS/6000 7043-140 boot floppies

Rico Pajarola rp at
Tue Feb 19 05:09:26 CST 2019

On Mon, Feb 18, 2019 at 6:49 PM Alan Perry via cctech <cctech at>

> Is there some trick to making boot floppies for the RS/6000 7043-140 (a
> mid-90s PReP architecture machine)?
> I initially tried to install Solaris 2.5.1 on it and created the boot

Solaris 2.5.1 PPC doesn't work on that machine.

I can't find the HCL doc, but according to the files present on the CD it
runs on:

IBM 6040 (ThinkPad 820)
IBM 6042 (ThinkPad 850)
IBM 6015 (PowerSeries 440, 7020-40P)
IBM 6050 (PowerSeries 830, 7248-43P)
IBM 6070 (PowerSeries 850, 7248-43P)
IBM 7248 (43P-100, 43P-120, 43P-132)
Motorola PowerStack Series DT/E/MT

The 7248-43P is substantially different from a 7043-140 "43P". I have it
running on a PowerStack Series E.

Did anyone ever unearth the Sun compiler for that?

floppy by dd'ing the image using a SPARCstation (running NetBSD). I
> dd'ed the image over, dd'ed it back and verified the SPARCstation could
> read back what it had written to the floppy. The RS/6000 loads what is
> on the floppy, but hangs transferring control to what it loaded.
> The 7043-140 does not appear on the list of supported systems in the
> Solaris 2.5.1 release notes, so, even though 2.5.1 supports PReP and the
> 7043-140 is a PReP machine, maybe they aren't compatible, so I tried
> NetBSD. The 7043-140 is listed as a supported system.
> The NetBSD boot floppy images are confusing to me. The files are too
> large to fit on a 1.44M floppy. I didn't see instructions on how to make
> boot floppies out of the .fs files one can download in the install
> instructions. I went ahead and tried to dd the part that fits onto a
> 1.44M floppy and try to boot that and of course that failed. I have
> e-mailed the NetBSD prep mailing list and no response from that.
> The system does boot the AIX install on one of its hard disks, but this
> is a recycled system and I don't have usernames/passwords for that install.
> Does anyone here have a suggestion on how to proceed?
> alan

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