mirror of
https://github.com/cc65/cc65.git
synced 2024-10-31 20:06:11 +00:00
72 lines
3.6 KiB
C
72 lines
3.6 KiB
C
/*****************************************************************************/
|
|
/* */
|
|
/* _6526.h */
|
|
/* */
|
|
/* Internal include file, do not use directly */
|
|
/* */
|
|
/* */
|
|
/* */
|
|
/* (C) 1998-2000 Ullrich von Bassewitz */
|
|
/* Wacholderweg 14 */
|
|
/* D-70597 Stuttgart */
|
|
/* EMail: uz@musoftware.de */
|
|
/* */
|
|
/* */
|
|
/* This software is provided 'as-is', without any expressed or implied */
|
|
/* warranty. In no event will the authors be held liable for any damages */
|
|
/* arising from the use of this software. */
|
|
/* */
|
|
/* Permission is granted to anyone to use this software for any purpose, */
|
|
/* including commercial applications, and to alter it and redistribute it */
|
|
/* freely, subject to the following restrictions: */
|
|
/* */
|
|
/* 1. The origin of this software must not be misrepresented; you must not */
|
|
/* claim that you wrote the original software. If you use this software */
|
|
/* in a product, an acknowledgment in the product documentation would be */
|
|
/* appreciated but is not required. */
|
|
/* 2. Altered source versions must be plainly marked as such, and must not */
|
|
/* be misrepresented as being the original software. */
|
|
/* 3. This notice may not be removed or altered from any source */
|
|
/* distribution. */
|
|
/* */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
#ifndef __6526_H
|
|
#define __6526_H
|
|
|
|
|
|
|
|
/* Define a structure with the 6526 register offsets.
|
|
* NOTE: The timer registers are not declared as 16 bit registers, because
|
|
* the order in which the two 8 bit halves are written is important, and
|
|
* the compiler doesn't guarantee any order when writing 16 bit values.
|
|
*/
|
|
struct __6526 {
|
|
unsigned char pra; /* Port register A */
|
|
unsigned char prb; /* Port register B */
|
|
unsigned char ddra; /* Data direction register A */
|
|
unsigned char ddrb; /* Data direction register B */
|
|
unsigned char ta_lo; /* Timer A, low byte */
|
|
unsigned char ta_hi; /* Timer A, high byte */
|
|
unsigned char tb_lo; /* Timer B, low byte */
|
|
unsigned char tb_hi; /* Timer B, high byte */
|
|
unsigned char tod_10; /* TOD, 1/10 sec. */
|
|
unsigned char tod_sec; /* TOD, seconds */
|
|
unsigned char tod_min; /* TOD, minutes */
|
|
unsigned char tod_hour; /* TOD, hours */
|
|
unsigned char sdr; /* Serial data register */
|
|
unsigned char icr; /* Interrupt control register */
|
|
unsigned char cra; /* Control register A */
|
|
unsigned char crb; /* Control register B */
|
|
};
|
|
|
|
|
|
|
|
/* End of _6526.h */
|
|
#endif
|
|
|
|
|
|
|