Category Archives: c-retro

Retro CPU Emulation, Other Retro Hardware

Playing Old Interactive Fiction Games on the HP3000

Last year I posted instructions on extracting and running the SIMH HP3000 emulation. I have found that many people downloading this file are doing so to run the Interactive Games on that system: WARP and MANSION. I decided to make … Continue reading

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Upgrade HP3000 SIMH Disk Drive from HP7920 to HP7925

The virtual hard drive that came with SIMH is a 55MB HP7920 disk drive. With just the O/S installed, there isn’t a lot of space left on this drive. This HP3000 can also emulate a 120MB HP7925. This procedure will … Continue reading

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Using Kermit to Transfer files to/from SIMH HP3000

After talking to another HP3000 SIMH user who had no viable way to transfer files to the HP3000, I set out to look for something a bit easier than create a simH tape. OK, using kermit still isn’t simple, but … Continue reading

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Copy files from an HP3000/XL Computer System to a SIMH HP3000/Classic

In my prior post, Instructions for Emulating an HP3000 with SIMH, my enclosed PDF of instructions discusses getting files onto the SIMH HP3000 using Reflections or creating a SIMH format tape. Both of these options have limitations if you want … Continue reading

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Instructions for Emulating an HP3000 with SIMH

The HP3000¬† minicomputer was the primary system I programmed from 1978 until 1993 when I moved into networking. I have so many fond memories of that system. I knew the hardware and software backward and forward. I was fortunate enough … Continue reading

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Telephone System Mechanical SXS Line Finder Video

Last spring I was in Oklahoma City. I flipped thru a website full of things to see and one was the Oklahoma Museum of Telephone History. This ended up being a great tour. It is located in a room in … Continue reading

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SIMH PDP-8: Manually Loading the RIM Loader, the Binary Loader, and an Application from Paper Tape

(all PDP-8 blog entries can be seen by clicking here) In my blog entry Assembling/Compiling to SIMH PDP-8 Paper Tape and Executing the Paper Tape¬†Program I loaded the Hello World test program into memory automatically using SIMH’s load command rather … Continue reading

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Instructions for Emulating an HP2000 Access Computer System using SIMH

Since I’ve been working on the PDP-8 emulation in past weeks, it occurred to me that I should post my old notes for setting up an HP2000 emulation. The HP2000 was the first computer system I ever used, back in … Continue reading

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Compiling and Running ‘Hello World!’ in PDP-8 FORTRAN IV

(all PDP-8 blog entries can be seen by clicking here) Since I figured out how to assemble PDP-8 PAL assembly language, I figured I should try to compile a FORTRAN program. The PDP-8 has two FORTRAN compilers: FORTRAN II and … Continue reading

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Assembling/Compiling to SIMH PDP-8 Paper Tape and Executing the Paper Tape Program

(all PDP-8 blog entries can be seen by clicking here) Now that I have successfully assembled and executed the Hello World! program I thought it would be fun to write the program to paper tape, then load and execute it … Continue reading

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