Opcode Mnemonic

no operation

(n) -> Rx

Rx -> (n)

(n) -> Rx

Rx -> (n)

(n) -> Rx

Rx -> (n)

n -> Rx

Rx & n -> Rx

Rx | n -> Rx

Rx ^ n -> Rx

Rx + n -> Rx

Rx - n -> Rx

RX - n -> (not written back)

Rx & n -> (not written back)

Sets the random fill parameters

CRC's data at Rx for length Ry using Rz for the CRC, and polynomial N

n -> Rx

Rx & n -> Rx

Rx | n -> Rx

Rx ^ n -> Rx

Rx + n -> Rx

Rx - n -> Rx

RX - n -> (not written back)

Rx & n -> (not written back)

Rx << Ry -> Rx

Rx >> Ry -> Rx

Rx >>> Ry -> Rx

RX <<< Ry -> Rx

Rx << n+1

Rx >> n+1

Rx <<< n+1

Rx >>> n+1

Ry -> Rx

Rx & Ry -> Rx

Rx | Ry -> Rx

Rx ^ Ry -> Rx

Rx + Ry -> Rx

Rx - Ry -> Rx

Ry - Rx -> (not written back)

Rx & Ry -> (not written back)

(Ry) -> Rx

Rx -> (Ry)

(Ry) -> Rx

Rx -> (Ry)

(Ry) -> Rx

Rx -> (Ry)

Rx * Ry -> Rx

Tests strings at Rx, Ry returns 0 for equality (and sets Z), 1 if Ry shorter than Rx, 2 for different.

Rx -> PMP(Ry) Writes to PMP register

PMP(Ry) -> Rx  Reads from PMP register

Rx -> PMP(Ry) (bytes, see examples below)

Fills Rx with Ry words. The upper byte of Ry is the fill byte

Rx / Ry -> Rx; Rx % Ry -> Ry. If dividing by 0 is attempted, will generate an error. Z set

Randomly fills PMP space.

Prints string at Rx to buffer

Prints byte of Rx to buffer in hex

Prints word of Rx to buffer in hex

Prints long of Rx to buffer in hex

Prints byte of Rx to buffer in dec

Prints word of Rx to buffer in dec

Prints long of Rx to buffer in dec

fs--, (top of stack) -> PC

if Z = 0, RET

if Z = 1, RET

if C = 0, RET

if C = 1, RET

Rx -> (top of stack), rs++

rs--, (top of stack) -> Rx

Loads error register into Rx and the error PC into Ry

Exits code successfully

Exits code with an error

0 -> carry

1 -> carry

Rx = UI element ID, Ry = status.
1 = visible, 0 = invisible, ff = check status, returns visible or not in Z flag — not currently implemented

Writes a 32-bit response into Ry based on the value given in Rx:
0: Ry = UNIX timestamp (unsigned)
1: Ry = Date in BCD format
2: Ry = Time in BCD format

Adjusts file size of file #Rx to value Ry

Adjusts file offset of file #Rx to value Ry

Adjusts file pmp address of file #Rx to value Ry

Load file Rx from json file. Rx returns length of file that was loaded

Returns the file extension of file Rx, and stores it into memory at Ry

Returns the file name of file Rx, and stores it into memory at Ry

Open file Rx. Length is returned in Ry. 0 length means file does not exist or is empty.

Closes the open file

Seeks to position Rx in file

Reads Ry bytes from the file into memory at Rx

Copies data from the open file to PMP. Rx = where in PMP space, Ry = size.

Select core Rx (ID)

Performs a host command. (reset, run, etc)

Tests whether there is a valid file in a json slot. Z is set if the file is valid/exists, clear if it doesn't.

n*2 -> PC

if Z = 0, JP n

if Z = 1, JP n

if C = 0, JP n

if C = 1, JP n

PC -> (top of stack),  cs++, n*2 -> PC

if Z = 0, CALL n

if Z = 1, CALL n

if C = 0, CALL n

if C = 1, CALL n