From: Alan Cox <alan@linux.intel.com>
Date: Thu, 4 Jun 2015 23:38:53 +0000 (+0100)
Subject: dragon-nx32: experimenting with cartridge auto-ident
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=c8e3d3a44d21289311d1a529935be656422a6c90;p=FUZIX.git

dragon-nx32: experimenting with cartridge auto-ident
---

diff --git a/Kernel/platform-dragon-nx32/main.c b/Kernel/platform-dragon-nx32/main.c
index cbeaf88c..7fdb531a 100644
--- a/Kernel/platform-dragon-nx32/main.c
+++ b/Kernel/platform-dragon-nx32/main.c
@@ -8,7 +8,7 @@
 uint8_t membanks;
 uint8_t system_id;
 uint8_t cartslots = 1;
-uint16_t carthash[4];
+uint8_t carttype[4];
 uint8_t bootslot = 0;
 
 void platform_idle(void)
@@ -42,22 +42,60 @@ void pagemap_init(void)
 
 static const char *sysname[] = {"Dragon", "COCO", "COCO3", "Unknown"};
 
+struct cart_rom_id {
+	uint16_t hash;
+	uint8_t id;
+	const char *name;
+};
+
+static const char empty[] = "(empty)";
+
+struct cart_rom_id carts[] = {
+	{ 0x72B0, 1, "DragonDOS" },
+	{ 0x9063, 3, "DeltaDOS" },
+	{ 0xB400, 0, empty },
+	{ 0xC248, 2, "RS-DOS" },
+	{ 0x0000, 0, "No ROM" }
+};
+
+static struct cart_rom_id *cart_lookup(uint16_t hash)
+{
+	struct cart_rom_id *cart = carts;
+	do {
+		if (cart->hash == hash)
+			return cart;
+	} while(cart++->hash);
+	return NULL;
+}
+
 void map_init(void)
 {
 	uint8_t i;
+	uint8_t bslot = 0;
+	uint16_t hash;
+	struct cart_rom_id *rom;
 
 	kprintf("%s system.\n", sysname[system_id]);
 	if (mpi_present()) {
 		kputs("MPI cartridge detected.\n");
 		cartslots = 4;
 		bootslot = mpi_set_slot(0);
+		bslot = bootslot & 3;
 	}
 	for (i = 0; i < cartslots; i++) {
 		mpi_set_slot((i << 4) | i);
-		carthash[i] = cart_hash();
-		kprintf("%d: %x %c\n",
-			i, carthash[i],
-			i == bootslot ? '*':' ');
+		hash = cart_hash();
+		rom = cart_lookup(hash);
+		if (rom) {
+			kprintf("%d: %s %c\n",
+				i, rom->name,
+				i == bootslot ? '*':' ');
+			carttype[i] = rom->id;
+		}
+		else
+			kprintf("%d: Unknown(%x) %c\n",
+				i, hash,
+				i == bslot ? '*':' ');
 	}
 	mpi_set_slot(bootslot);
 }