Memory Access Functions

IC has primitives for directly examining and modifying memory contents. These should be used with care as it is easy to corrupt memory and crash the system using these functions.

int peek(int loc)

Returns the byte located at address loc.

int peekword(int loc)

Returns the 16-bit value located at address loc and loc$+$1. loc has the most significant byte, as per the 6811 16-bit addressing standard.

void poke(int loc, int byte)

Stores the 8-bit value byte at memory address loc.

void pokeword(int loc, int word)

Stores the 16-bit value word at memory addresses loc and loc$+$1.

void bit_set(int loc, int mask)

Sets bits that are set in mask at memory address loc.

void bit_clear(int loc, int mask)

Clears bits that are set in mask at memory address loc.