Michael Kohne
  • Member for 4 years, 11 months
  • Last seen this week
What happened to ZIP RAM?
25 votes

Right off the top, SIMM type modules have higher pin densities and are mechanically far more robust than that ZIP chip package. It'd be relatively easy to bend pins getting these things in an out (...

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Is it possible to make a ROM converter?
13 votes

The problem is that the emulator is emulating a LOT more than just the CPU. So in addition to transpiling the 6502 code to Intel code (and don't think that's simple - making the timing come out right ...

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How do I Interface a PS/2 Keyboard without Modern Techniques?
8 votes

If you really want to do it the shift-register way, there are 9 bit shift registers available. If you do a search at digi-key for '9 bit shift register', then sort the resulting table by number of ...

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How was dataflow analysis performed before SSA?
7 votes

Quite frequently it wasn't. When your compiler is running on a 286 with 512K of memory, using floppies for storage, the optimizations by the compiler are very localized if they exist at all. ...

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How was the C language ported to architectures with non-power-of-2 word sizes?
7 votes

The TI TMS34010 Graphics System Processor was capable of addressing memory in any particular transfer size you liked (2, 4, 6, 8, whatever bits). This was a natural outgrowth of its focus on graphics, ...

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Video chip for hypothetical 1988 arcade game
5 votes

Another approach, depending on what you really want to do (do you WANT to design your own board, or do you just want to program 1988-class hardware?), is to pick an existing arcade board, and try to ...

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NES cartridge ROM emulation with Arduino or Pi?
5 votes

When I did some hard embedded work about 20 years ago, we have a set of 'EPROM Emulators'. Basically, it was a set of rams that plugged into our system in place of the system's eproms. You'd hold the ...

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Would a replacement screen from a TRS-80 model 102 work for a model 100?
4 votes

If you want to use a 102 display in a 100, you've got an annoying task ahead - While User12's answer shows that they are electrically the same, the connector is very different. The Model 100 has a 2 ...

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How were files transferred between different systems in the late 1980s?
1 votes

When I was moving stuff from an Apple IIe to a Mac SE, I ended up wiring the Mac's serial port to a couple of pins on the IIe's joystick port, then using a program that bit-banged serial output at ...

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