Hi Jay, I don't know if you are into Motorola microcontrollers or not, but I'm looking for an IP core for the MC68HC11K Microcontroller as I can't find the actual chip on ebay. Would you be interested in implementing this microcontroller in VHDL? I'm trying to learn VHDL, but my many projects keep wanting my time. :) I believe there is plenty of reference material for you to use. I've collected some documentation myself that I would be happy to share if need be. Please let me know what you think. Take care my friend.
Kip Koon computer...@sc.rr.com http://www.cocopedia.com/wiki/index.php/Kip_Koon > -----Original Message----- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jan Adelsbach > Sent: Thursday, July 30, 2015 3:32 PM > To: General Discussion: On-Topic and Off-Topic Posts > Subject: PDP-1 in Verilog (Incomplete) + More > > Hi all, > > At the time I've released my DG NOVA in Verilog I was also working on a > PDP-1 in Verilog. Since I haven't > touched the thing for quite some time I've decided to just release it before > it catches dust. So far it can execute all kinds of programs, > limitation is that they may not use IO as I haven't implemented the latter > yet. (So essentially the same state as my DG NOVA > implementation) It also supports optionally some PDP-1D features in the OPR > and SKP instruction groups. Interrupts are implemented > but untested. I'm not sure in which state I left the IOT controller if it > works then both SBS and SBS16 might be usable. > TL;DR: https://github.com/Jside/pdp1 > > The RCA110 was the project I was working on before I started the DG NOVA, it > can execute some instructions but there is to much > ambiguity in the reference manual on bitsavers in some cases which led me to > abandon it. Especially since there is no software to > cross-check. > So for reference you can get it here: > https://github.com/Jside/rca110 > > I wanted to mess around a bit with Chisel (a new HDL language used by the > RISCV project) so here is the start of a CDC160 (currently > only the instruction decoder): > https://github.com/Jside/cdc160 > > I've also uploaded my DG NOVA to Github: https://github.com/Jside/nova1 > > MC14500B anyone? http://janadelsbach.com/soft/mc14500b.tar > > I will occasionally continue working on both the NOVA and PDP-1 (and maybe > CDC160?). Also pull requests are welcome. > As is obvious I *really* like implementing old computers in HDL languages but > I always get stuck around IO since for any kind of > flexibility as with an emulator I essentially would need to write a bus > wrapper so that a (soft-core) processor executing Linux running > an IO server could handle i.e. hard disks and magnetic tapes and that's I > think really not worth it. So I might just go over and contribute > to an emulator/simulator like SIMH if I'm in an > must-implement-an-old-computer/processor mood ;). > > Regards, > Jan
