Start reorganizing pokeyellow

1 files changed, 39 insertions, 0 deletions

diff --git a/home/bankswitch2.asm b/home/bankswitch2.asm
new file mode 100644
index 00000000..cc7169cd
--- /dev/null
+++ b/home/bankswitch2.asm
@@ -0,0 +1,39 @@
+BankswitchCommon::
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	ret
+
+Bankswitch::
+; self-contained bankswitch, use this when not in the home bank
+; switches to the bank in b
+	ldh a, [hLoadedROMBank]
+	push af
+	ld a, b
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	call JumpToAddress
+	pop bc
+	ld a, b
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	ret
+JumpToAddress::
+	jp hl
+
+SwitchSRAMBankAndLatchClockData::
+	push af
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	pop af
+	ld [MBC1SRamBank], a
+	ret
+
+PrepareRTCDataAndDisableSRAM::
+	push af
+	ld a, $0
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	pop af
+	ret