Minicore

This project was developed for the CSCI6461 Computer Architecture course during my masters studies at the George Washington University.

The core library for the minicomputer projects, shared between the minicomputer, and the assembler for the minicomputer ISA minicomputer-asm

Unit Testing

Unit tests were created using JUnit within vscode, for running and checking unit tests see the 'Testing' tab in vscode.

Instructions

Load & Store Instructions

Instruction	Opcode	Description
LDR	000001	Load register from memory
STR	000010	Store register to memory
LDA	000011	Load register with address
LDX	100001	Load index register from memory
STX	100010	Store index register to memory

Transfer Instructions

Instruction	Opcode	Description
JZ	001010	Jump if zero
JNE	001011	Jump if not equal
JCC	001100	Jump if condition code
JMA	001101	Uncondiational jump to address
JSR	001110	Jump and save return address
RFS	001111	Return from subroutine
SOB	010000	Subtract one and branch
JGE	010001	Jump greater than or equal to

Arithmetic & Logic Instructions

Instruction	Opcode	Description
AMR	000100	Add memory to register
SMR	000101	Subtract memory from register
AIR	000110	Add immediate to register
SIR	000111	Subtract immediate from register

Instruction	Opcode	Description
MLT	010010	Multiply register by register
DVD	010011	Divide register by register
TRR	010100	Test equality of register and register
AND	010101	Logical AND of register to register
ORR	010110	Logical OR of register to register
NOT	010111	Logical NOT of register to register

Instruction	Opcode	Description
SRC	011000	Shift register by count
RRC	011001	Rotate register by count

IO Instructions

Instruction	Opcode	Description
IN	111101	Input character to register from device
OUT	111110	Output character to device from register
CHK	111111	Check device status to register

Misc Instructions

Instruction	Opcode	Description
HLT	000000	Stops the machine
TRP	011000	Traps to memory address 0