git.y1.nz

commit f0911ec978ea9c57cd1456d0579067cfceab7485
parent 48e050eddacb8a73f2ee50680fb26e2c972de48a
Author: toxa <untoxa@mail.ru>
Date:   Mon,  5 Oct 2020 19:44:36 +0300

disable ability of switching upper MBC5 ROM banks SWITCH_ROM_MBC5 macro, you can use SWITCH_ROM_MBC5_8M when making a 8MB rom, but note that automatic tracking of the bank number won't be avaliable

Diffstat:
M
gbdk-lib/include/gb/gb.h
10
+++++++---

1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/gbdk-lib/include/gb/gb.h b/gbdk-lib/include/gb/gb.h
@@ -269,13 +269,17 @@ __REG _current_bank;
   *(unsigned char *)0x6000 = 0x01
 
 /* Note the order used here.  Writing the other way around
- * on a MBC1 always selects bank 0 (d'oh)
+ * on a MBC1 always selects bank 1
  */
 /** MBC5 */
 #define SWITCH_ROM_MBC5(b) \
   _current_bank = (b), \
-  *(unsigned char *)0x3000 = (UINT16)(b) >> 8, \
-  *(unsigned char *)0x2000 = (UINT8)(b)
+  *(unsigned char *)0x3000 = 0, \
+  *(unsigned char *)0x2000 = (b)
+
+#define SWITCH_ROM_MBC5_8M(b) \
+  *(unsigned char *)0x3000 = ((UINT16)(b) >> 8), \
+  *(unsigned char *)0x2000 = (b)
 
 #define SWITCH_RAM_MBC5(b) \
   *(unsigned char *)0x4000 = (b)

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