Processor Instruction Sets
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09-09-2021, 06:09 PM
Post: #9
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RE: Processor Instruction Sets
Thanks for asking:
After several iterations of ideas, simulations, long walks and sleepness nights, I think I have come up with a workable "design": Original instruction set (I wanted to re-write it at some point), a micro-sequenced ALU, using EPROMs (saves like 50 chips) and a discrete (with registers and adders) ALU. And a 2 phase clock, I dropped the single clock (too much fpga ghosts in my head) it simplifies some parts of the sequencing of the ALU. I'm testing the microsequenced ALU now, building the real thing, I mean. I did the clock using a '74 and a couple of ANDs to discover that it glitches , I'll use 4 D FFs, it will not glitch . (The daily job kind of gets in the way of doing productive work, if you know what I mean ) Best regards, Ale |
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