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Added C128 in C64 mode accelerator code and documentation.

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This commit is contained in:
Marco van den Heuvel
2018-04-20 12:08:28 -07:00
parent 305c6e7ae4
commit 3f5683b391
8 changed files with 213 additions and 1 deletions
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39
include/accelerator.h
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@@ -136,5 +136,44 @@ extern unsigned char detect_c64dtv (void);
* 0x01 : C64DTV present
*/
/* C128 in C64 mode */
extern unsigned char __fastcall__ set_c128_speed (unsigned char speed);
/* Set the speed of the C128 CPU, using SPEED_SLOW will switch to
* 1 Mhz (slow) mode, SPEED_2X or SPEED_FAST will switch to 2Mhz (fast) mode.
*
* Note that any value higher or equal to SPEED_2X will switch to fast mode.
*
* This function will return the actual speed the CPU is at after trying
* to set the requested speed, to my knowledge the switching should not fail.
*
* This function does not check for the presence of a C128 in C64 mode,
* make sure you use 'detect_c128();' before using.
*/
extern unsigned char get_c128_speed (void);
/* Get the speed of the C128 CPU.
*
* Possible return values:
* SPEED_SLOW : Slow mode
* SPEED_2X : Fast mode
*
* This function does not check for the presence of a C128 in C64 mode,
* make sure you use 'detect_c128();' before using.
*/
extern unsigned char detect_c128 (void);
/* Check for the presence of a C128 in C64 mode.
*
* Possible return values:
* 0x00 : C128 in C64 mode not present
* 0x01 : C128 in C64 mode present
*/
/* End of accelerator.h */
#endif