321 ttcpu 4-bit RISC microprocessor
321 : ttcpu 4-bit RISC microprocessor
- Author: Ojas Sharma
- Description: A custom 4-bit RISC microprocessor design for the Tiny Tapeout ASIC
- GitHub repository
- Open in 3D viewer
- Clock: 0 Hz
How it works
you give instructions, the cpu do them :)
How to test
will update this at some point in the future with the instructions, assembler, and general isa stuff
External hardware
a ram and rom chip are needed, probably going to be emulated using an external microcontroller
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | rom_data[0] | rom_address[0] | ram_data[0] |
| 1 | rom_data[1] | rom_address[1] | ram_data[1] |
| 2 | rom_data[2] | rom_address[2] | ram_data[2] |
| 3 | rom_data[3] | rom_address[3] | ram_data[3] |
| 4 | rom_data[4] | rom_address[4] | ram_address[0] |
| 5 | rom_data[5] | rom_address[5] | ram_address[1] |
| 6 | rom_data[6] | ram_address[4] | ram_address[2] |
| 7 | rom_data[7] | ram_wen | ram_address[3] |