Dr. CockroachWell, here it is mid August and my hacking is in full swing despite having company stay with my wife and I for a while and even through a cat 1 hurricane. Just was informed last week that two of my entries in the "Making Tech At Home" contest made the top thirty. Waiting to find out what is in the grab bag prize.
The LLTP processor build is coming along better than I expected as I have the Sequencer tied into the ALU and Accumulator to create a very basic Load function. So the first instruction is LDA - Load the Accumulator with the output of the ALU. There is still a long way to go with the LLTP as I am currently working on the Mux and then the Dmux and another register will follow. Beyond that is the PC - Program Counter and the IR - Instruction Register.
I have a very good outlook on the future for the LLTP. At first I was not truly convinced that a processor could be made with my Light Logic gates but now with the success I have had to date, I firmly believe that a complete CPU can be made without any transistors or relays. Diodes and resistors rule.
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I'm glad you're keeping at this! It's been a blast to follow you. I assume if there's any tape reader attached, it will be optical, right? ;)
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Oh not to worry, if a tape is involved then it will be optical for sure. Right now I am still trying to decide if instructions will be read and executed directly from tape or fed into memory or skip the tape and toggle into memory like the old IMSAI8080. I like the idea of a tape most of all but if executed from tape then I lose the Jump instruction I would like to have in the instruction set I am also working on :-)
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How about both? The ability to run fixed sequences of instructions from tape would be pretty useful, alongside stored-program. Some of the early electromechanical machines could do that.
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