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

@@ -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"