SPEC.txt

=== OVERVIEW ===
* 8-bit data width
* 8-bit addressing [SXMX] for a total of 256bytes of RAM (16bytes if SX left untouched)
=== ASSEMBLY ===
* Anything after a ";" is considered a comment, whether a line starts with it, or is in the middle of one
* A line of the form " @ ADDR VAL  " stores that specific value at the specified address
* A line of the form " # ADDR  " basically tells the assembler that the next instruction will be placed in that address
=== INSTRUCTIONS ===

 0: NOP  
 1: LDA   mem8	-> AX = [mem8]  
 2: ADD^  mem8	-> BX = [mem8], AX = AX + BX 
 3: SUB^  mem8 	-> BX = [mem8], AX = AX - BX 
 4: JMP^  imm4	-> PC = imm4  
 5: JZ    imm4	-> PC = imm4 if ZF = 1 else NOP
 6: JC    imm4 	-> PC = imm4 if CF = 1 else NOP
 7: LDS   imm4 	-> SX = imm4
 8: RND  	-> AX = RND 
 9: STORE mem8	-> [mem8] = AX
 A: JNI   imm4	-> PC = imm4 if IF = 0 else NOP
 B: READ^ 	-> AX = keyboard input
 C: PRINT 	-> TTY = AX
 D: CLS		-> Clear TTY & Kb
 E: NS		-> PC = 0, SX++
 F: HLT		-> HALT

* mem8 - a reference (pointer) to an 8-bit (byte) value.
* imm4 - an immediate (i.e. included right in the instruction and thus invariable) 4-bit (byte) value.



^ these instructions load the (F)lags register
=== REGISTERS ===
AX: 	GP Register
BX: 	Arithmetics Register
MX: 	Memory address Register
SX:	Segment register
PC: 	Program counter
RND:	Random Number Generator(Read Only)
FR:	Flag Register(LSB to MSB)
		ZF: Zero Flag
		CF: Carry Flag
		IF: Input Flag
=== IO ===
TTY:	 	Displays 7bit ASCII character
Keyboard: 	Sends 7bit ASCII character IF = 1 if buffer is non empty