Add target atari7800

2022-03-01 06:44:26 +02:00
parent f8cdb2ab63
commit 328781bf8a
8 changed files with 476 additions and 0 deletions
--- a/include/atari7800.h
+++ b/include/atari7800.h
@@ -0,0 +1,105 @@
+/*****************************************************************************/
+/*                                                                           */
+/* Atari VCS 7800 TIA & RIOT registers addresses                             */
+/*                                                                           */
+/* Karri Kaksonen  (karri@sipo.fi), 2022                                     */
+/*                                                                           */
+/*                                                                           */
+/*****************************************************************************/
+
+
+
+#ifndef _ATARI7800_H
+#define _ATARI7800_H
+
+/* Check for errors */
+#if !defined(__ATARI7800__)
+#  error This module may only be used when compiling for the Atari 7800!
+#endif
+
+/*****************************************************************************/
+/*                                   Data                                    */
+/*****************************************************************************/
+
+
+
+/* Color defines */
+#define COLOR_BLACK             0x00
+#define COLOR_WHITE             0x0F
+
+/* TGI color defines (default palette) */
+#define TGI_COLOR_BLACK         COLOR_BLACK
+#define TGI_COLOR_WHITE         COLOR_WHITE
+
+/* Masks for joy_read */
+#define JOY_RIGHT_MASK          0x80
+#define JOY_LEFT_MASK           0x40
+#define JOY_DOWN_MASK           0x20
+#define JOY_UP_MASK             0x10
+#define JOY_BTN_1_MASK          0x01
+#define JOY_BTN_2_MASK          0x02
+
+#define JOY_BTN_A_MASK          JOY_BTN_1_MASK
+#define JOY_BTN_B_MASK          JOY_BTN_2_MASK
+
+#define JOY_BTN_A(v)            ((v) & JOY_BTN_A_MASK)
+#define JOY_BTN_B(v)            ((v) & JOY_BTN_B_MASK)
+
+/* No support for dynamically loadable drivers */
+#define DYN_DRV 0
+
+#include <_tia.h>
+#define TIA (*(struct __tia*)0x0000)
+
+#include <_riot.h>
+#define RIOT (*(struct __riot*)0x0280)
+
+#include <_maria.h>
+#define MARIA (*(struct __maria*)0x0020)
+
+/*
+ * Alternative MARIA register definitions.
+ */
+#define BKGRND      MARIA.bkgrnd
+#define BACKGRND    MARIA.bkgrnd
+#define P0C1        MARIA.p0c1
+#define P0C2        MARIA.p0c2
+#define P0C3        MARIA.p0c3
+#define WSYNC       MARIA.wsync
+#define P1C1        MARIA.p1c1
+#define P1C2        MARIA.p1c2
+#define P1C3        MARIA.p1c3
+#define MSTAT       MARIA.mstat
+#define P2C1        MARIA.p2c1
+#define P2C2        MARIA.p2c2
+#define P2C3        MARIA.p2c3
+#define DPPH        MARIA.dpph
+#define DPH         MARIA.dpph
+#define P3C1        MARIA.p3c1
+#define P3C2        MARIA.p3c2
+#define P3C3        MARIA.p3c3
+#define DPPL        MARIA.dppl
+#define DPL         MARIA.dppl
+#define P4C1        MARIA.p4c1
+#define P4C2        MARIA.p4c2
+#define P4C3        MARIA.p4c3
+#define CHBASE      MARIA.chbase
+#define P5C1        MARIA.p5c1
+#define P5C2        MARIA.p5c2
+#define P5C3        MARIA.p5c3
+#define OFFSET      MARIA.offset
+#define P6C1        MARIA.p6c1
+#define P6C2        MARIA.p6c2
+#define P6C3        MARIA.p6c3
+#define CTRL        MARIA.ctrl
+#define P7C1        MARIA.p7c1
+#define P7C2        MARIA.p7c2
+#define P7C3        MARIA.p7c3
+
+/*
+ * MSTAT register constants
+ */
+#define MSTAT_VBLANK    0x80    /* vblank is on when bit 7 is set */
+
+/* End of atari7800.h */
+#endif