GB MBC: Fix MBC1 RAM enable bit selection

CHANGES

@@ -6,6 +6,7 @@ Emulation fixes:
  - ARM: Fix ALU reading PC after shifting
  - ARM: Fix STR storing PC after address calculation
  - GB MBC: Fix MBC1 mode changing behavior
+ - GB MBC: Fix MBC1 RAM enable bit selection
  - GB Video: Fix state after skipping BIOS (fixes mgba.io/i/1715 and mgba.io/i/1716)
  - GBA: Fix timing advancing too quickly in rare cases
  - GBA BIOS: Implement dummy sound driver calls

cinema/gb/mooneye-gb/emulator-only/mbc1/bits_ram_en/config.ini

@@ -1,2 +0,0 @@
-[testinfo]
-fail=1

cinema/gb/mooneye-gb/emulator-only/mbc1/bits_ram_en/test.sym

@@ -1,84 +0,0 @@
-; this file was created with wlalink by ville helin <vhelin@iki.fi>.
-; wla symbolic information for "/home/vicki/Scratch/mooneye-gb/tests/build/emulator-only/mbc1/bits_ram_en.gb".
-
-[labels]
-01:48c9 clear_vram
-01:487a disable_lcd_safe
-01:4880 disable_lcd_safe@wait_ly_0
-01:4898 memcmp
-01:48dd memcpy
-01:48e6 memset
-01:48a6 print_hex4
-01:48d3 print_hex8
-01:48f6 print_inline_string
-01:48b2 print_load_font
-01:48be print_newline
-01:48ef print_string
-01:47f0 quit
-01:4805 quit@cb_return
-01:480a quit@wait_ly_1
-01:4810 quit@wait_ly_2
-01:4816 quit@wait_ly_3
-01:481c quit@wait_ly_4
-01:4826 quit@success
-01:484d quit@failure
-01:4862 quit@halt
-01:4863 quit@halt_execution_0
-01:4866 reset_screen
-01:4889 serial_send_byte
-01:4000 font
-00:0150 main
-00:0164 test_round1
-00:018e test_round2
-00:01ae test_round2@expect_enabled
-00:01b3 test_round2@expect_disabled
-00:01cc test_round2@quit_inline_1
-00:01dd ram_data_enabled
-00:01ed ram_data_disabled
-00:01fd compare_ram_data
-00:0206 fail_round1_disable
-00:020d fail_round1_disable@quit_inline_2
-00:0240 fail_round1_enable
-00:0247 fail_round1_enable@quit_inline_3
-00:0279 fail_round1_print_test_address
-00:0286 fail_round2_disable
-00:028d fail_round2_disable@quit_inline_4
-00:02ab fail_round2_expect
-00:02b2 fail_round2_expect@quit_inline_5
-00:2000 ram_en_expectations
-00:ff80 test_address
-00:ff80 test_address_l
-00:ff81 test_address_h
-00:ff82 ram_en_value
-
-[definitions]
-0000000a _sizeof_clear_vram
-0000000f _sizeof_disable_lcd_safe
-0000000e _sizeof_memcmp
-00000009 _sizeof_memcpy
-00000009 _sizeof_memset
-0000000c _sizeof_print_hex4
-0000000a _sizeof_print_hex8
-00000006 _sizeof_print_inline_string
-0000000c _sizeof_print_load_font
-0000000b _sizeof_print_newline
-00000007 _sizeof_print_string
-00000076 _sizeof_quit
-00000014 _sizeof_reset_screen
-0000000f _sizeof_serial_send_byte
-000007f0 _sizeof_font
-00000002 _sizeof_test_address
-00000001 _sizeof_test_address_l
-00000001 _sizeof_test_address_h
-00000001 _sizeof_ram_en_value
-00000014 _sizeof_main
-0000002a _sizeof_test_round1
-0000004f _sizeof_test_round2
-00000010 _sizeof_ram_data_enabled
-00000010 _sizeof_ram_data_disabled
-00000009 _sizeof_compare_ram_data
-0000003a _sizeof_fail_round1_disable
-00000039 _sizeof_fail_round1_enable
-0000000d _sizeof_fail_round1_print_test_address
-00000025 _sizeof_fail_round2_disable
-00001d55 _sizeof_fail_round2_expect

cinema/gb/mooneye-gb/emulator-only/mbc1/bits_ramg/config.ini

@@ -1,2 +1,2 @@
 [testinfo]
-fail=1
+skip=360

src/gb/mbc.c

@@ -442,7 +442,7 @@ void _GBMBC1(struct GB* gb, uint16_t address, uint8_t value) {
 	int bank = value & 0x1F;
 	switch (address >> 13) {
 	case 0x0:
-		switch (value) {
+		switch (value & 0xF) {
 		case 0:
 			memory->sramAccess = false;
 			break;