Shop OBEX P1 Docs P2 Docs Learn Events
Cluso's SAP Computer - Page 2 — Parallax Forums

Cluso's SAP Computer

2»

Comments

  • With 16 instructions you can either have a NOP or a RCL. Without a shift instruction, mul and div will be slower.

    Question is, does one really need a NOP instruction?

    Enjoy!

    Mike
  • Cluso99Cluso99 Posts: 18,069
    In a tiny computer such as the SAP, no a NOP is unnecessary. If you need a NOP for timing it is easy enough to repeat an instruction.
  • Hello!
    For advice on how to construct your gadget, please examine this site Homebrew CPU Home from there he lists references. I suggested one of them, an excellent article in Byte magazine regarding one chap's efforts to build one.

    But don't let me stop you......
  • Cluso99Cluso99 Posts: 18,069
    I have seen that, and a lot of other designs. Lots of awesome designs around.

    However I have plenty of computer and design experience to design my own, which is what I am doing. Just have a few ideas to make it modular, so that I can replace each module with an alternate implementation. So I could have, for example, the monitoring (front panel) done with a prop and LCD, the PC from transistors, the decoder with an eeprom(s), the ALU and ACC with an FPGA, and memory with 74xxx latches and an SRAM.

    I am just interested to build it differently ;)
Sign In or Register to comment.