mirror of
https://github.com/cc65/cc65.git
synced 2024-12-27 00:29:31 +00:00
39 lines
851 B
C
39 lines
851 B
C
|
/*
|
||
|
|
* _6525.h
|
||
|
|
*
|
||
|
|
* Ullrich von Bassewitz, 22.09.1998
|
||
|
|
*
|
||
|
|
* Internal include file, do not use directly.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef __6525_H
|
||
|
|
#define __6525_H
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* Define a structure with the 6525 register offsets. The shadow registers
|
||
|
|
* (if port C is unused) are currently not implemented, we would need a
|
||
|
|
* union to do that, however that would introduce an additional name.
|
||
|
|
*/
|
||
|
|
struct __6525 {
|
||
|
|
unsigned char pra; /* Port register A */
|
||
|
|
unsigned char prb; /* Port register B */
|
||
|
|
unsigned char prc; /* Port register C */
|
||
|
|
unsigned char ddra; /* Data direction register A */
|
||
|
|
unsigned char ddrb; /* Data direction register B */
|
||
|
|
unsigned char ddrc; /* Data direction register C */
|
||
|
|
unsigned char cr; /* Control register */
|
||
|
|
unsigned char air; /* Active interrupt register */
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* End of _6525.h */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
|