Abstract CPU implementation / ASAP3 - Centurion

[fredcwbr]

• Context :: Guide request on abstract CPU coding

• Educational proposal using simh as teaching tool on processor design
• Looking for a Guide/Tutorial on coding an abstract CPU (similar to Malvino's SAP-3) in order to code the CENTURION CPU-6 on the simh from scratch .

With the restoration of a Centurion Microcomputer by https://www.youtube.com/@UsagiElectric and a group of people that reverse engineered almost all machine, it looks interesting to code it on simh.

Just found simh last week , and didn't quite figure how to code the SAP-3 , in order to tackle the CENTURION CPU-6 .,, using this as a learning tool to cpu design.

• "sim> SHOW VERSION"

  simulator V4.0-0 Current Simulator Framework Capabilities: 32b data 32b addresses no Ethernet Idle/Throttling support is available Virtual Hard Disk (VHD) support RAW disk and CD/DVD ROM support Asynchronous I/O support (Lock free asynchronous event queue) Asynchronous Clock support FrontPanel API Version 12 Host Platform: Compiler: GCC 12.2.0 Simulator Compiled as C arch: x64 (Release Build) on Jan 30 2023 at 17:59:22 Build Tool: simh-makefile Memory Access: Little Endian Memory Pointer Size: 64 bits Large File (>2GB) support SDL Video support: No Video Support PCRE RegEx (Version 8.41 2017-07-05) support for EXPECT commands OS clock resolution: 1ms Time taken by msleep(1): 1ms OS: Linux alpha 6.0.0-6-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.0.12-1 (2022-12-09) x86_64 GNU/Linux tar tool: tar (GNU tar) 1.34 curl tool: curl 7.87.0 (x86_64-pc-linux-gnu) libcurl/7.87.0 OpenSSL/3.0.7 zlib/1.2.13 brotli/1.0.9 zstd/1.5.2 libidn2/2.3.3 libpsl/0.21.0 (+libidn2/2.3.0) libssh2/1.10.0 nghttp2/1.51.0 librtmp/2.3 git commit id: 09899c18 git commit time: 2023-01-22T13:55:58-0800

• Simulator built on Debian 11 linux, with cmake from git clone

[pkoning2]

Building a new simulator, whether the simulated machine is "real" or a paper model, sounds like a good project and SIMH should be a good way to do so. For example, it would be an interesting idea to do a MIX simulator in SIMH.

I'm not sure what you're looking for in this "issue". Is there a problem with SIMH that stands in the way? Or are you looking for help from the community in your project of building a new simulator? If the latter, it will be more effective to use the mailing list (simh@groups.io) for that.

[fredcwbr]

I'm looking for help on building the simulator for both the ASAP-3 (in order to learn the basics) , and finally the Centurio CPU-6., SIMH is not a problem whatsoever, I'ts my own limitation on knowing where and how to start, .. . Tried to subscribe to the groups, but didn't work .,. Will try this new link here .

Thanks in advance.,

[fredcwbr]

Just a follow-up to whomever is taking care of "Help With SimH" web page, the Topic SimH users mailing list states: (SimH AT trailing-edge DOT com)., but for some reason this email does not work properly. Using the simh AT groups DOT io , as suggested by pkoning2 above, did the trick . Thanks for the assistance.,

Moving my much needed help to proper channel.

Best regards., ..

Fred