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https://github.com/cc65/cc65.git
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106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
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/*****************************************************************************/
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/* */
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/* Atari VCS 7800 TIA & RIOT registers addresses */
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/* */
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/* Karri Kaksonen (karri@sipo.fi), 2022 */
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/* */
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/* */
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/*****************************************************************************/
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#ifndef _ATARI7800_H
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#define _ATARI7800_H
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/* Check for errors */
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#if !defined(__ATARI7800__)
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# error This module may only be used when compiling for the Atari 7800!
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#endif
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Color defines */
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#define COLOR_BLACK 0x00
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#define COLOR_WHITE 0x0F
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/* TGI color defines (default palette) */
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#define TGI_COLOR_BLACK COLOR_BLACK
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#define TGI_COLOR_WHITE COLOR_WHITE
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/* Masks for joy_read */
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#define JOY_RIGHT_MASK 0x80
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#define JOY_LEFT_MASK 0x40
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#define JOY_DOWN_MASK 0x20
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#define JOY_UP_MASK 0x10
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#define JOY_BTN_1_MASK 0x01
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#define JOY_BTN_2_MASK 0x02
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#define JOY_BTN_A_MASK JOY_BTN_1_MASK
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#define JOY_BTN_B_MASK JOY_BTN_2_MASK
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#define JOY_BTN_A(v) ((v) & JOY_BTN_A_MASK)
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#define JOY_BTN_B(v) ((v) & JOY_BTN_B_MASK)
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/* No support for dynamically loadable drivers */
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#define DYN_DRV 0
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#include <_tia.h>
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#define TIA (*(struct __tia*)0x0000)
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#include <_riot.h>
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#define RIOT (*(struct __riot*)0x0280)
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#include <_maria.h>
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#define MARIA (*(struct __maria*)0x0020)
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/*
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* Alternative MARIA register definitions.
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*/
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#define BKGRND MARIA.bkgrnd
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#define BACKGRND MARIA.bkgrnd
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#define P0C1 MARIA.p0c1
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#define P0C2 MARIA.p0c2
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#define P0C3 MARIA.p0c3
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#define WSYNC MARIA.wsync
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#define P1C1 MARIA.p1c1
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#define P1C2 MARIA.p1c2
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#define P1C3 MARIA.p1c3
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#define MSTAT MARIA.mstat
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#define P2C1 MARIA.p2c1
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#define P2C2 MARIA.p2c2
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#define P2C3 MARIA.p2c3
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#define DPPH MARIA.dpph
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#define DPH MARIA.dpph
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#define P3C1 MARIA.p3c1
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#define P3C2 MARIA.p3c2
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#define P3C3 MARIA.p3c3
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#define DPPL MARIA.dppl
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#define DPL MARIA.dppl
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#define P4C1 MARIA.p4c1
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#define P4C2 MARIA.p4c2
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#define P4C3 MARIA.p4c3
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#define CHBASE MARIA.chbase
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#define P5C1 MARIA.p5c1
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#define P5C2 MARIA.p5c2
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#define P5C3 MARIA.p5c3
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#define OFFSET MARIA.offset
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#define P6C1 MARIA.p6c1
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#define P6C2 MARIA.p6c2
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#define P6C3 MARIA.p6c3
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#define CTRL MARIA.ctrl
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#define P7C1 MARIA.p7c1
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#define P7C2 MARIA.p7c2
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#define P7C3 MARIA.p7c3
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/*
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* MSTAT register constants
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*/
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#define MSTAT_VBLANK 0x80 /* vblank is on when bit 7 is set */
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/* End of atari7800.h */
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#endif
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