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cc65/include/creativision.h
Oliver Schmidt 7f52a770d9 Removed joy_masks array.
So far the joy_masks array allowed several joystick drivers for a single target to each have different joy_read return values. However this meant that every call to joy_read implied an additional joy_masks lookup to post-process the return value.

Given that almost all targets only come with a single joystick driver this seems an inappropriate overhead. Therefore now the target header files contain constants matching the return value of the joy_read of the joystick driver(s) on that target.

If there indeed are several joystick drivers for a single target they must agree on a common return value for joy_read. In some cases this was alredy the case as there's a "natural" return value for joy_read. However a few joystick drivers need to be adjusted. This may cause some overhead inside the driver. But that is for sure smaller than the overhead introduced by the joy_masks lookup before.

!!! ToDo !!!

The following three joystick drivers become broken with this commit and need to be adjusted:
- atrmj8.s
- c64-numpad.s
- vic20-stdjoy.s
2017-08-19 19:11:28 +02:00

79 lines
3.5 KiB
C

/*****************************************************************************/
/* */
/* creativision.h */
/* */
/* Creativision system specific definitions */
/* */
/* */
/* */
/* (C) 2013 cvemu */
/* (C) 2017 Christian Groessler <chris@groessler.org> */
/* */
/* */
/* 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 _CVISION_H
#define _CVISION_H
/* Character codes */
#define CH_VLINE 33
#define CH_HLINE 34
#define CH_ULCORNER 35
#define CH_URCORNER 36
#define CH_LLCORNER 37
#define CH_LRCORNER 38
/* Masks for joy_read */
#define JOY_UP_MASK 0x10
#define JOY_DOWN_MASK 0x04
#define JOY_LEFT_MASK 0x20
#define JOY_RIGHT_MASK 0x08
#define JOY_BTN_1_MASK 0x01
#define JOY_BTN_2_MASK 0x02
/* no support for dynamically loadable drivers */
#define DYN_DRV 0
/* Colours - from TMS9918 */
#define C_TRANSPARENT 0
#define C_BLACK 1
#define C_MED_GREEN 2
#define C_LIGHT_GREEN 3
#define C_DARK_BLUE 4
#define C_LIGHT_BLUE 5
#define C_DARK_RED 6
#define C_CYAN 7
#define C_MED_RED 8
#define C_LIGHT_RED 9
#define C_DARK_YELLOW 10
#define C_LIGHT_YELLOW 11
#define C_DARK_GREEN 12
#define C_MAGENTA 13
#define C_GREY 14
#define C_WHITE 15
/* Protos */
void __fastcall__ psg_outb(unsigned char b);
void __fastcall__ psg_delay(unsigned char b);
void psg_silence(void);
void __fastcall__ bios_playsound(void *a, unsigned char b);
#endif /* #ifndef _CVISION_H */