Basic-computer NPM

An implementation of John C. Scotts 8-bit computer written in typescript.

Specs

npm install

npm run start

npm run test

instruction code	shorthand	description
1000 rarb	ADD	Adds contents of ra and rb together, then places result into rb.
1001 rarb	SHR	Shifts contents of ra to the right by one bit, then places result the into rb.
1010 rarb	SHL	shifts contents of ra to the left by one bit, then places the result into rb.
1011 rarb	NOT	Performs a NOT operation between the bytes stored in ra and rb, then places the result into rb.
1100 rarb	AND	Performs a AND operation between the bytes stored in ra and rb, then places the result into rb.
1101 rarb	OR	Performs a OR operation between the bytes stored in ra and rb, then places the result into rb.
1110 rarb	XOR	Performs a XOR operation between the bytes stored in ra and rb, then places the result into rb.
1111 rarb	CMP	Compares the bytes stored in ra and rb, discards output byte, places result of comparison in flag register.
0000 rarb	LD	Loads contents of ram address stored from ra into rb.
0001 rarb	ST	Stores contents of rb into ram address from ra.
0010 00rb	DATA	Loads the byte following this instruction into rb.
0011 00rb	JMPR	Jump to the address stored in rb.
0100 0000	JMP	Jump to the address indicated in the byte following this instruction.
0101 caez	JCAEZ	Jump if any tested flag is on using JMP, else move IAR forward two bytes.
0110 0000	CLF	Clears the flag register.