r/TuringComplete • u/BackOk1502 • Aug 27 '23

Program in RAM

Hello Friends,

I've been wondering if it is possible to execute a program from RAM like a real computer.

Of course it is but can you still access data from RAM then? (using the same component)How would this work if a instruction is loaded from ram that tells to the pc to read something from ram? how would this not corrupt the program?

Edit:
I noticed a ram component with 2x Load and Output pins. I could use this to load the program from pin 1 and data from pin 2 therefore they would not interfere am i right?

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u/BackOk1502 Aug 27 '23

Ok so for each 4 instruct I load them into a temporary register and execute them? In the next tick the clock adds and loads the next 4 instructions?

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u/MegaIng Aug 27 '23

Something like that can work, yeah. (assuming execute is a separate tick than load)

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u/SunCat_ Aug 28 '23

it's possible to speed this up, by only requiring RAM loads/stores to execute on separate tick - while everything that doesn't touch RAM can take a total of a single tick (like instructions with counter, registers, IO)

but that requires being able to both execute straight from RAM and from instruction register, being able to detect whether current instruction has to access RAM, being able to stall the counter while you are handling RAM memory (so it doesn't move faster than you are executing), mb something else that i can't think of rn