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Add target atari7800
This commit is contained in:
Karri Kaksonen
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/*****************************************************************************/
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/* */
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/* _maria.h */
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/* */
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/* Atari 7800, Maria chip register hardware structures */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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/*
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* MARIA registers
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*/
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struct __maria {
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unsigned char bkgrnd;
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unsigned char p0c1;
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unsigned char p0c2;
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unsigned char p0c3;
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unsigned char wsync;
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unsigned char p1c1;
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unsigned char p1c2;
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unsigned char p1c3;
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unsigned char mstat;
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unsigned char p2c1;
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unsigned char p2c2;
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unsigned char p2c3;
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unsigned char dpph;
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unsigned char p3c1;
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unsigned char p3c2;
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unsigned char p3c3;
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unsigned char dppl;
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unsigned char p4c1;
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unsigned char p4c2;
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unsigned char p4c3;
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unsigned char chbase;
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unsigned char p5c1;
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unsigned char p5c2;
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unsigned char p5c3;
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unsigned char offset;
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unsigned char p6c1;
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unsigned char p6c2;
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unsigned char p6c3;
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unsigned char ctrl;
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unsigned char p7c1;
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unsigned char p7c2;
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unsigned char p7c3;
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};
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@@ -0,0 +1,105 @@
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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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