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I'm working on KL10-PV hardware emulation/FPGA #45

Open alanmimms opened 11 months ago

alanmimms commented 11 months ago

Hello. I have been "hobby" working on a KL10-PV emulation of the real hardware in Verilog for a while now. I hope someday to boot TOPS-20 on this in simulation and then make it run in an FPGA. I'm a software guy who knows something about hardware as well.

I forgot to mention the repository for this project, which is called "Jurassic-20", is at https://github.com/alanmimms/jurassic-20.

larsbrinkhoff commented 11 months ago

I for one think this is awesome! May I put in a word for the MiSTer platform? I think I persuaded @jfcl to consider it for his https://github.com/KS10FPGA/KS10FPGA

Just the other day I was thinking about making a KL10-style panel for the PiDP-11. I dare say it would make a nice combination with a KL10 FPGA.

CC @eswenson1

alanmimms commented 11 months ago

Sure. I think you're right about the pairing with the console someday. It's really still just starting to be debugged, but I'm enjoying the effort.

Thanks. A

On Thu, Sep 21, 2023, 22:51 Lars Brinkhoff @.***> wrote:

I for one think this is awesome! May I put in a word for the MiSTer platform? I think I persuaded @jfcl https://github.com/jfcl to consider it for his https://github.com/KS10FPGA/KS10FPGA

Just the other day I was thinking about making a KL10-style panel for the PiDP-11. I dare say it would make a nice combination with a KL10 FPGA.

CC @eswenson1 https://github.com/eswenson1

— Reply to this email directly, view it on GitHub https://github.com/PDP-10/-READ--THIS-/issues/45#issuecomment-1730838208, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAILN2V5MJ6NMS32QQBA2MTX3URNBANCNFSM6AAAAAA5CJ2CJE . You are receiving this because you authored the thread.Message ID: @.***>

larsbrinkhoff commented 11 months ago

I added some interesting files here: https://github.com/PDP-10/kldcp

david-moon commented 11 months ago

How does this relate to [ http://www.fpgaretrocomputing.org/pdp10x/ | http://www.fpgaretrocomputing.org/pdp10x/ ? ]

larsbrinkhoff commented 11 months ago

As far as i know, no relation at all. I believe Conroy's PDP-10/X is close to a KA10 - with some changes - but microcoded, and only runs ITS.

alanmimms commented 11 months ago

How does this relate to [ http://www.fpgaretrocomputing.org/pdp10x/ | http://www.fpgaretrocomputing.org/pdp10x/ ? ]

It's completely unrelated, except that the end result may be similar. I'm starting with the KL10-PV schematics and building Verilog from them (using a compilation technique). My Verilog builds the boards with exactly the same logic as the original, and I have modeled each of the ECL10k chips required in Verilog as well. I'm not "writing this from scratch" in the sense that when I'm done my implementation should be - unless there are transcription errors - precisely bug-for-bug compatible with the original in the schematics. I can run the same microcode, OSes, etc.

Of course, the compatibility problems will come from things like making the I/O devices work properly (which I have hardly started). Right now I'm writing Verilog code in my "test bench" to pretend to be the PDP11/40, shoving the microcode and dispatch-RAM content into the memories using the very same KL10 diagnostic operations the 11/40 used, and obtaining the microcode/D-RAM image from the very same KLX.RAM file the 11/40 RSX-20m used to do. I could do this by running (or writing) an 11/40 emulator and booting RSX-20m and creating a real DTE-20 bridge device to connect the emulated 11/40 to my KL10. I have considered this, since the 11/40 part of what I'm doing right now is annoyingly complicated to get right because of bit numbering, word size, byte sex, alignment, bit shuffling, and some pretty ugly PDP-11 code in the front end written by someone who had a talent for making something that should be very simple into something complex.

Fortunately for me I have @larsbrinkhoff's KLDCP code written by someone with actual PDP11 assembly language skill and talent for simplicity. I'm now moving a bit more quickly using that than I was looking at KLINIT.L20. Thanks, @larsbrinkhoff.

alanmimms commented 11 months ago

I just had an idea. I could run the PDP11/40 code in a simulator and watch it transform the KLX.RAM data into the EBUS diagnostic commands and record those output actions. I could then play back those actions and Bob would be, as they say, my uncle.

alanmimms commented 11 months ago

Does anyone know if there is a bootable RSX20F that can run in simh somehow?

larsbrinkhoff commented 11 months ago

This might be your best bet: "This directory contains images of the three RSX20F V16.00 install floppies. These are raw RX01 images" http://ns1.dbit.com/pub/pdp10/kl10/rsx20f/

Also try to search through this: https://google.com/search?q=rsx20f&sitesearch=pdp-10.trailing-edge.com

alanmimms commented 11 months ago

Thanks. I use trailing edge all the time but never found the floppy images.

On Sun, Sep 24, 2023, 09:49 Lars Brinkhoff @.***> wrote:

This might be your best bet: "This directory contains images of the three RSX20F V16.00 install floppies. These are raw RX01 images" http://ns1.dbit.com/pub/pdp10/kl10/rsx20f/

Also try to search through this: https://google.com/search?q=rsx20f&sitesearch=pdp-10.trailing-edge.com

— Reply to this email directly, view it on GitHub https://github.com/PDP-10/-READ--THIS-/issues/45#issuecomment-1732618006, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAILN2UMMPLOCXHGGEBC4BDX4BP75ANCNFSM6AAAAAA5CJ2CJE . You are receiving this because you authored the thread.Message ID: @.***>