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Re: ns32k digression (Was: VAXstation 4000/90 - ssh & display oddities)

On Fri, 4 May 2012 16:05:30 -0700
Emil Skoeldberg <emil.skoldberg%nuigalway.ie@localhost> wrote:

> There seems to be an FPGA implementation of the PC532,
> [http://www.vcfe.org/D/Vortraege.html], but no details, and I was not
> at the talk.
I've been there. What he has at the moment:
One board with a original NS32k CPU + FPU and a FPGA. The FPGA contains
a complete PC532 mainboard reimplementation. RAM is a single 32 MB PS/2
SIMM. This runs a unmodified NetBSD-1.5.
A second system, that consists of a tiny FPGA eval board and a smal
custom board. The later is mostly a pin breakout extender and contains
some minor hardware like a RTC. This system reimplements the NS32k CPU
+ FPU and PC532 mainboard in the FPGA. Design and implementation is
mostly done. At the moment he is debugging some probems with the
bootloader.[1] The goal is to run a unmodified NetBSD.

Once he finished he will upload the design files to

[1] The bootloader also initializes the SCSI-IDE emulation in the FPGA.
Yes. He emulates a complete SCSI host and target in the FPGA. So the
PC523 sees a SCSI disk but the actual disk is a IDE disk.



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