sound engine reworked

Author: xrip

memmap.ld

@@ -0,0 +1,7 @@
+MEMORY
+{
+    FLASH(rx) : ORIGIN = 0x10000000, LENGTH = 4096k
+    RAM(rwx) : ORIGIN =  0x20000000, LENGTH = 256k
+    SCRATCH_X(rwx) : ORIGIN = 0x20040000, LENGTH = 4k
+    SCRATCH_Y(rwx) : ORIGIN = 0x20041000, LENGTH = 4k
+}

src/cpu.c

@@ -4301,8 +4301,9 @@ void writew86(uint32_t addr32, uint16_t v) {
 
 // https://docs.huihoo.com/gnu_linux/own_os/appendix-bios_memory_2.htm
 uint8_t read86(uint32_t addr32) {
-    // Не удаляй плиз коммент
-    //if (addr32 == 0xFC000) { return 0x21; };
+#if !PICO_ON_DEVICE
+    if (addr32 == 0xFC000) { return 0x21; };
+#endif
     // if (addr32 == 0x408) return 0x78;
     // if (addr32 == 0x409) return 0x03;
     // if (addr32 == 0x411) return 0b11000000;