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+/*
+ ds81 - Nintendo DS ZX81 emulator.
+
+ Copyright (C) 2006 Ian Cowburn <ianc@noddybox.co.uk>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version 2
+ of the License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ $Id: main.c 77 2010-11-23 08:10:25Z ianc $
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <nds.h>
+#include <fat.h>
+
+#include "framebuffer.h"
+#include "gui.h"
+#include "keyboard.h"
+#include "z80.h"
+#include "zx81.h"
+#include "tapes.h"
+#include "config.h"
+#include "textmode.h"
+#include "monitor.h"
+#include "snapshot.h"
+
+#include "splashimg_bin.h"
+#include "rom_font_bin.h"
+
+#include "ds81_debug.h"
+
+#ifndef DS81_VERSION
+#define DS81_VERSION "DEV " __TIME__ "/" __DATE__
+#endif
+
+
+/* ---------------------------------------- STATIC DATA
+*/
+static const char *main_menu[]=
+ {
+ "Reset ZX81",
+ "Select Tape",
+ "Configure",
+ "Map Joypad to Keys",
+ "Machine Code Monitor",
+#ifndef DS81_DISABLE_FAT
+ "Save Memory Snapshot",
+ "Load Memory Snapshot",
+ "Save Joypad/Key State",
+ "Load Joypad/Key State",
+#endif
+ "Cancel",
+ NULL
+ };
+
+typedef enum
+{
+ MenuReset,
+ MenuSelectTape,
+ MenuConfigure,
+ MenuMapJoypad,
+ MenuMonitor,
+#ifndef DS81_DISABLE_FAT
+ MenuSaveSnapshot,
+ MenuLoadSnapshot,
+ MenuSaveMappings,
+ MenuLoadMappings
+#endif
+} MenuOpt;
+
+
+/* Backgrounds
+*/
+static int main_bitmap_bg;
+static int main_text_overlay_bg;
+static int sub_bitmap_bg;
+static int sub_text_overlay_bg;
+
+/* ---------------------------------------- IRQ FUNCS
+*/
+
+/* ---------------------------------------- DISPLAY FUNCS
+*/
+static void VBlankFunc(void)
+{
+ scanKeys();
+}
+
+static void Splash(void)
+{
+ static char scroller[]=
+ {
+ " "
+ "Welcome to DS81, a ZX81 emulator for the Ninetendo DS. "
+ "You can safely ignore this message. I was just bored for half an "
+ "hour. And no retro game is complete without a side-scroller... "
+ "Thanks to Slay Radio, Ladytron, the Genki Rockets, the High "
+ "Voltage SID Collection and Retro Gamer for coding fuel."
+ };
+
+ static const char *text[]=
+ {
+ "DS81 \177 2006 Ian C",
+ " ",
+ "ZX81 ROM \177 1981",
+ "Nine Tiles Networks LTD",
+ " ",
+ "PRESS A TO CONTINUE",
+ " ",
+ "http://www.noddybox.co.uk/",
+ " ",
+ " ",
+ " ",
+ " ",
+ "Checking for FAT device...",
+ NULL
+ };
+
+ sImage img;
+ int f;
+ int y;
+ int res=FALSE;
+ int scr_x=0;
+
+ ZX81SuspendDisplay();
+ ZX81DisplayString("10 rem " DS81_VERSION "\n"
+ "20 print \"%the zx81 is ace%\"\n"
+ "30 goto 20");
+
+ bgSetScale(sub_text_overlay_bg, 0x80, 0x80);
+
+ TM_printf(0,11,"%-18.18s",scroller);
+
+ FB_Clear();
+
+ loadPCX(splashimg_bin,&img);
+
+ FB_Blit(&img,0,0,1);
+
+ y = 10;
+
+ for(f=0;text[f];f++)
+ {
+ FB_Centre(text[f],y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+ }
+
+ y += 8;
+
+#ifndef DS81_DISABLE_FAT
+ res = fatInitDefault();
+#endif
+
+ if (res)
+ {
+ ZX81EnableFileSystem(TRUE);
+ SNAP_Enable(TRUE);
+
+ FB_Centre("Found a FAT device.",y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+
+ FB_Centre("If you place .P tape files in",y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+
+ FB_Centre("the top directory or ZX81SNAP",y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+
+ FB_Centre("then you should be able to load",y,
+ COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+
+ FB_Centre("GAME.P with the command",y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+
+ FB_Centre("LOAD \"GAME\"",y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+ }
+ else
+ {
+ ZX81EnableFileSystem(FALSE);
+ SNAP_Enable(FALSE);
+
+ FB_Centre("Sorry, but you don't have a",y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+
+ FB_Centre("supported FAT device.",y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+
+ FB_Centre("Only the internal tape",y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+
+ FB_Centre("files can be used.",y,COL_WHITE,COL_TRANSPARENT);
+ y += 8;
+ }
+
+ while(!(keysDown() & KEY_A))
+ {
+ swiWaitForVBlank();
+
+ if (++scr_x == 8)
+ {
+ size_t l = sizeof scroller;
+ char c;
+
+ scr_x = 0;
+
+ c = scroller[0];
+ memmove(scroller,scroller+1,l-2);
+ scroller[l-2] = c;
+
+ TM_printf(0,11,"%-18.18s",scroller);
+ }
+
+ bgSetScroll(sub_text_overlay_bg, scr_x << 8, 0);
+ bgUpdate();
+ }
+
+ bgSetScale(sub_text_overlay_bg, 0x100, 0x100);
+ bgSetScroll(sub_text_overlay_bg, 0, 0);
+ bgUpdate();
+
+ TM_Cls();
+
+ ZX81ResumeDisplay();
+}
+
+
+/* ---------------------------------------- JOYPAD MAPPING
+*/
+static void MapJoypad(void)
+{
+ SoftKeyEvent ev;
+ SoftKey pad = NUM_SOFT_KEYS;
+ int done = FALSE;
+ char text[256];
+
+ SK_DisplayKeyboard();
+
+ ZX81SuspendDisplay();
+
+ ZX81DisplayString("press the joypad button you want\n"
+ "to define and then the ZX81 key\n"
+ "you want to use.\n\n"
+ "press on the config banner to\n"
+ "finish.");
+
+ while(!done)
+ {
+ while(SK_GetBareEvent(&ev))
+ {
+ if (ev.pressed)
+ {
+ if (ev.key==SK_ABOUT || ev.key==SK_CONFIG)
+ {
+ done = true;
+ }
+ }
+ else
+ {
+ if (ev.key>=SK_PAD_UP && ev.key<=SK_PAD_SELECT)
+ {
+ pad = ev.key;
+
+ /* Now, just how dumb was making % the inverse on/off...
+ */
+ sprintf(text,"defining\n %%%s%%",SK_KeyName(pad));
+ ZX81DisplayString(text);
+ }
+
+ if (ev.key<=SK_SPACE && pad!=NUM_SOFT_KEYS)
+ {
+ sprintf(text,"mapped\n %%%s%%\nto\n %%%s%%",
+ SK_KeyName(pad),SK_KeyName(ev.key));
+ ZX81DisplayString(text);
+
+ SK_DefinePad(pad,ev.key);
+
+ pad = NUM_SOFT_KEYS;
+ }
+ }
+ }
+
+ swiWaitForVBlank();
+ }
+
+ ZX81ResumeDisplay();
+}
+
+
+/* ---------------------------------------- MAIN
+*/
+int main(int argc, char *argv[])
+{
+ Z80 *z80;
+
+ powerOn(POWER_ALL_2D);
+
+ /* Set up main screen for ZX81 and load the ROM character data
+ */
+ videoSetMode(MODE_3_2D);
+
+ vramSetBankA(VRAM_A_MAIN_BG_0x06000000);
+ vramSetBankB(VRAM_B_MAIN_BG_0x06020000);
+
+ main_bitmap_bg = bgInit(3, BgType_Bmp16, BgSize_B16_256x256, 2, 0);
+ main_text_overlay_bg = bgInit(0, BgType_Text8bpp, BgSize_T_256x256, 0, 1);
+
+ bgSetPriority(main_bitmap_bg, 1);
+ bgSetPriority(main_text_overlay_bg, 0);
+
+ BG_PALETTE[0] = RGB15(31,31,31);
+ BG_PALETTE[1] = RGB15(0,0,0);
+
+ dmaCopy(rom_font_bin,(void *)BG_TILE_RAM(1),rom_font_bin_size);
+
+ /* Set up the sub-screen for rotation (basically for use as a framebuffer).
+ Now overlaid with a text screen for the monitor (I thought a bitmapped
+ printing routine would needlessly slow down the monitor when watching
+ the ZX81 run). Having said the overlay is currently a rotation map
+ for some pointless frippery! Still be quicker though.
+ */
+ videoSetModeSub(MODE_4_2D);
+
+ vramSetBankC(VRAM_C_SUB_BG_0x06200000);
+
+ sub_bitmap_bg = bgInitSub(3, BgType_Bmp8, BgSize_B8_256x256, 1, 0);
+ sub_text_overlay_bg = bgInitSub(2, BgType_Rotation, BgSize_R_256x256, 4, 0);
+
+ bgSetPriority(sub_bitmap_bg, 1);
+ bgSetPriority(sub_text_overlay_bg, 0);
+
+ /* Tell 'framebuffer' routines to use this
+ */
+ FB_Init((uint16*)BG_BMP_RAM_SUB(1), BG_PALETTE_SUB);
+
+ /* Set up lower screen text overlay
+ */
+ FB_LoadASCIITiles((uint16*)BG_TILE_RAM_SUB(0));
+ TM_Init((uint16*)BG_MAP_RAM_SUB(4),32,32,TRUE);
+
+ /* Set up interrupts and timers
+ */
+ irqInit();
+ irqSet(IRQ_VBLANK,VBlankFunc);
+ irqEnable(IRQ_VBLANK);
+
+ /* All required stuff initialised
+ */
+ keysSetRepeat(30,15);
+
+ z80 = Z80Init(ZX81ReadMem,
+ ZX81WriteMem,
+ ZX81ReadPort,
+ ZX81WritePort,
+ ZX81ReadDisassem);
+
+ if (!z80)
+ {
+ GUI_Alert(TRUE,"Failed to initialise\nthe Z80 CPU emulation!");
+ }
+
+ ZX81Init((uint16*)BG_MAP_RAM(0), (uint16*)BG_BMP_RAM(2), z80);
+
+ Splash();
+
+ LoadConfig();
+ ZX81Reconfigure();
+
+ SK_DisplayKeyboard();
+
+ SK_SetSticky(SK_SHIFT,DS81_Config[DS81_STICKY_SHIFT]);
+
+ if (DS81_Config[DS81_LOAD_DEFAULT_SNAPSHOT])
+ {
+ SNAP_Load(z80, "AUTO", SNAP_TYPE_FULL);
+ }
+
+ while(1)
+ {
+ SoftKeyEvent ev;
+
+ Z80Exec(z80);
+
+ while(SK_GetEvent(&ev))
+ {
+ switch(ev.key)
+ {
+ case SK_ABOUT:
+ case SK_CONFIG:
+ if (ev.pressed)
+ {
+ switch(GUI_Menu(main_menu))
+ {
+ case MenuReset:
+ ZX81Reset(z80);
+ break;
+
+ case MenuSelectTape:
+ SelectTape();
+ break;
+
+ case MenuConfigure:
+ GUI_Config();
+ SK_SetSticky(SK_SHIFT,
+ DS81_Config[DS81_STICKY_SHIFT]);
+ ZX81Reconfigure();
+ break;
+
+ case MenuMapJoypad:
+ MapJoypad();
+ break;
+
+ case MenuMonitor:
+ MachineCodeMonitor(z80);
+ break;
+
+#ifndef DS81_DISABLE_FAT
+ case MenuSaveSnapshot:
+ SNAP_Save(z80, SNAP_TYPE_FULL);
+ break;
+
+ case MenuLoadSnapshot:
+ SNAP_Load(z80, NULL, SNAP_TYPE_FULL);
+ break;
+
+ case MenuSaveMappings:
+ SNAP_Save(z80, SNAP_TYPE_KEYBOARD);
+ break;
+
+ case MenuLoadMappings:
+ SNAP_Load(z80, NULL, SNAP_TYPE_KEYBOARD);
+ break;
+#endif
+ }
+
+ SK_DisplayKeyboard();
+ }
+ break;
+
+ default:
+ ZX81HandleKey(ev.key,ev.pressed);
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
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