From 5fc5dc13b255e10139a600956eb46c4dc28bd04a Mon Sep 17 00:00:00 2001
From: cassidy <cassidymoen@gmx.com>
Date: Tue, 7 Dec 2021 15:29:30 -0500
Subject: [PATCH] Add ROM version to unused hw vector and before filename in
 SRAM Two 16 bit ints located at $FFE0 (0x7FE0 PC) in ROM and burned into SRAM
 starting at $701FFC, just before the ROM name

---
 LTTP_RND_GeneralBugfixes.asm | 9 +++++++++
 init.asm                     | 9 ++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/LTTP_RND_GeneralBugfixes.asm b/LTTP_RND_GeneralBugfixes.asm
index 9960257..a9c3585 100644
--- a/LTTP_RND_GeneralBugfixes.asm
+++ b/LTTP_RND_GeneralBugfixes.asm
@@ -27,6 +27,15 @@ db #$00 ; expand file to 2mb
 org $1FFFF8 ; <- FFFF8 timestamp rom
 db #$20, #$19, #$08, #$31 ; year/month/day
 
+;================================================================================
+!ROM_VERSION_LOW = 1  ; ROM version (two 16-bit integers)
+!ROM_VERSION_HIGH = 1 ;
+
+org $00FFE0 ; Unused hardware vector
+RomVersion:
+dw !ROM_VERSION_LOW
+dw !ROM_VERSION_HIGH
+
 ;================================================================================
 
 !ADD = "CLC : ADC"
diff --git a/init.asm b/init.asm
index 340c4a9..8fc9a65 100644
--- a/init.asm
+++ b/init.asm
@@ -1,3 +1,5 @@
+RomVersionSRAM = $701FFC
+
 ;--------------------------------------------------------------------------------
 ; Init_Primary
 ;--------------------------------------------------------------------------------
@@ -39,6 +41,11 @@ Init_Primary:
 			LDA $00FFC0, X : STA $702000, X
 			INX
 			CPX #$15 : !BLT -
+                LDX #$00
+                -
+                        LDA RomVersion, X : STA RomVersionSRAM, X
+                        INX
+                        CPX #$04 : !BLT -
 	.done
 
 	REP #$20
@@ -63,4 +70,4 @@ Init_PostRAMClear:
 	JSL MSUInit
 	JSL InitRNGPointerTable
 
-JML $00D463	; The original target of the jump table that we hijacked
\ No newline at end of file
+JML $00D463	; The original target of the jump table that we hijacked