PlutoISA/assembly.txt

This is the documentation for the PlutoISA assembly.

Copyright (c)  2024  Patrick_Pluto.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".



Legend:

V: Value
R: ROM Address
C: Register/Cache Address
M: Memory Address



Keywords:

00 - GET - get from rom
LOAD DESTINATION SOURCE
LOAD C00 V00

01 - LOAD - load from memory
LOAD DESTINATION SOURCE
LOAD C00 M00

02 - STORE - store in memory
STORE SOURCE DESTINATION
STORE C00 M00

03 - ADD - addition
ADD RESULT SOURCE1 SOURCE2
ADD C02 C00 C01

04 - SUB - subtaction
SUB RESULT SOURCE1 SOURCE2
SUB C02 C00 C01

05 - JMP - jump
JMP DESTINATION
JMP R00

06 - JEQ - jump if equals
JMP DESTINATION SOURCE1 SOURCE2
JMP R00 R01 C00

07 - HIN - halt for input
HIN DESTINATION
HIN R00

Reserved registers:

Register 8 is used for text and number output. Numbers through hex 01-25 correspond to a number, here is the sheet:

00 - Nothing

01-0A - Numbers from 0-9

0B-24 - Letters from A-Z (capitalized)

25 - Space

26 - New line

27-FF - Nothing

To print, just make sure to store the corresponding number in register 8, and don't forget to replace it with 00, else it will constantly print out, as it doesn't clear.