fixes to teensy mcume

-nofrendo sample rate changed to 44100Hz
-changed gnuboy horizontal resolution to 160px
-changed gnuboy refresh rate to 60Hz
-added the select button to gnuboy
-enabled max 490KB roms for teensy without PSRAM

MCUME_teensy/teensygnuboy/emu.cpp

@@ -35,6 +35,8 @@ extern "C" void  write_rom(int address, uint8 val)  {
 
 #else
 
+#ifdef HAS_PSRAM
+
 #include "psram_t.h"
 
 PSRAM_T psram = PSRAM_T(PSRAM_CS, PSRAM_MOSI, PSRAM_SCLK, PSRAM_MISO);
@@ -46,6 +48,20 @@ extern "C" uint8 read_rom(int address) {
 extern "C" void  write_rom(int address, uint8 val)  {
   psram.pswrite(address,val); 
 }
+
+#else
+
+DMAMEM static unsigned char MemPool[490*1024];
+
+extern "C" uint8 read_rom(int address) {
+  return (MemPool[address+rom_offset]); 
+}
+
+extern "C" void  write_rom(int address, uint8 val)  {
+  MemPool[address]=val;
+}
+
+#endif
 #endif
 
 void emu_KeyboardOnDown(int keymodifer, int key) {
@@ -60,7 +76,7 @@ void emu_KeyboardOnUp(int keymodifer, int key) {
 void gbe_Init(void)
 {
   emu_printf("Allocating MEM");
-#ifndef HAS_T41     
+#ifdef HAS_PSRAM
   psram.begin();
 #endif  
   mem_init();    
@@ -144,7 +160,9 @@ void gbe_Step(void)
     hw.pad|=PAD_B;
   }
 
-  if (k & MASK_KEY_USER2)  hw.pad|=PAD_START; //PAD_SELECT;
+  if (k & MASK_KEY_USER2)  hw.pad|=PAD_START;
+
+  if (k & MASK_KEY_USER3)  hw.pad|=PAD_SELECT;
 
 
 //  cpu_emulate(2280);

MCUME_teensy/teensygnuboy/teensygnuboy.ino

@@ -251,7 +251,7 @@ void loop(void)
       // In VGA mode, we show the keyboard on TFT
       toggleVirtualkeyboard(true); // keepOn
       Serial.println("Starting");
-      myTimer.begin(vblCount, 40000);  //to run every 20ms  
+      myTimer.begin(vblCount, 16666);  // 60Hz = 1/0.016666
 #endif                      
     }         
     delay(20);

MCUME_teensy/teensygnuboy/tft_t_dma.h

@@ -23,10 +23,10 @@
 #define PAL_COLOR_MASK 0xff
 
 #ifdef LOHRES
-#define TFT_WIDTH      240 
+#define TFT_WIDTH      160 
 #define TFT_REALWIDTH  240
 #else
-#define TFT_WIDTH      320 
+#define TFT_WIDTH      160 
 #define TFT_REALWIDTH  320
 #endif
 #define TFT_HEIGHT     144

MCUME_teensy/teensynofrendo/nes_emu.c

@@ -91,7 +91,7 @@ static int osd_init_sound(void)
 
 void osd_getsoundinfo(sndinfo_t *info)
 {
-   info->sample_rate = (22050*20000)/16666; // fix for 60Hz
+   info->sample_rate = 44100
    info->bps = 16;
 }
 

README.md

@@ -199,10 +199,10 @@ Game console systems supported and status on various MCU platforms<br>
 | Odyssey/Videopac             | X | X | X | X | X | X | X |
 | Colecovision                 | X | X | X | X | X | X | X |
 | Atari 5200                   | X | X | X | X | X | X | X |
-| Nintendo NES                 | X | big roms! | X | X | X | X | - |
+| Nintendo NES                 | X | 384KB roms! | X | X | X | X | - |
 | Vectrex                      | - | full speed! | X | X | - | slow | - |
 | PC Engine                    | - | - | X | X | - | - | - |
-| Gameboy/GBColor              | - | - | X | X | - | - | - |
+| Gameboy/GBColor              | - | 490KB roms| X | X | - | - | - |
 | Sega Master System/Game Gear | - | - | X | X | - | - | - |
 | Sega Genesis/Megadrive       | - | - | X | X | - | - | - |