mirror of
https://github.com/RevCurtisP/C02.git
synced 2024-11-25 06:31:25 +00:00
41 lines
1.1 KiB
Plaintext
41 lines
1.1 KiB
Plaintext
/****************************************************
|
|
* pointer - Pointer Manipulation Functions for C02 *
|
|
****************************************************/
|
|
|
|
/* Set Pointer Address *
|
|
* Args: &a - Address *
|
|
* Args: zp - zero page pointer address */
|
|
void ptrset();
|
|
|
|
/* Write byte to pointer address *
|
|
* and increment pointer *
|
|
* Args: b - Byte to write * /
|
|
void ptrput();
|
|
|
|
/* Read byte from pointer address *
|
|
* and increment pointer *
|
|
* Returns: Byte read from pointer */
|
|
char ptrget();
|
|
|
|
/* Increment Pointer */
|
|
void ptrinc();
|
|
|
|
/* Decrement Pointer */
|
|
void ptrdec();
|
|
|
|
/* Add Offset to Pointer *
|
|
* Args: n - Number of bytes to add * /
|
|
void ptradd();
|
|
|
|
/* Subtract Offset from Pointer *
|
|
* Args: n - Number of bytes to subtract * /
|
|
void ptrsub();
|
|
|
|
/* Compare Pointer to Address *
|
|
* Args: &a - Address to compare against *
|
|
* Returns: Result of comparison *
|
|
* -1 = Pointer < Address *
|
|
* 0 = Pointer = Address *
|
|
* 1 = Pointer > Address */
|
|
void ptrcmp();
|