Homebrew CPU
This a simple CPU implemented in Logisim, inspired by the SAP-1 architecture featured in the book "Digital Computer Electronics" by Albert Paul Malvino.
##Instruction Set:
- LDI - Load immediate
- STM - Store to memory
- LDM - Load from memory
- LDMA - Load from memory pointed to by A
- ADDI - Add immediate
- SUBI - Sub immediate
- ADDM - Add from memory
- SUBM - Sub from memory
- JMPI - Jump to immediate address
- JMPM - Jump to address stored in memory
- JMPA - Jump to address stored in A
- JMPMA - Jump to address stored in memory pointed to by A
- JZI - Jump to immediate address if Zero flag set
- JCI - Jump to immediate address if Carry flag set
- OUT - Output the value stored in A
- HLT - Halt
Assembler Features
- Hex, binary and decimal values
- Labels
- Constants
- $ represents current address
- Data bytes
- Can output to raw binary or Logisim binary image file