add Galaxian to the collection

res/GAMES.CONF

@@ -106,6 +106,7 @@
 0001,FROGGER
 1001,FROGGER.II=Frogger II
 1000,FUJI.SPEED.WAY=Fuji Crowded Speedway
+0001,GALAXIAN
 0001,GALAXY.GATES
 1001,GAMMA.GOBLINS
 0101,GAUNTLET

res/TITLE.HGR/_FileInformation.txt

@@ -98,6 +98,7 @@ FROGGER.II=Type(06),AuxType(4000),Access(C3)
 FS2=Type(06),AuxType(4000),Access(C3)
 FUJI.SPEED.WAY=Type(06),AuxType(4000),Access(C3)
 G.I.JOE=Type(06),AuxType(4000),Access(C3)
+GALAXIAN=Type(06),AuxType(4000),Access(C3)
 GALAXY.GATES=Type(06),AuxType(4000),Access(C3)
 GAMMA.GOBLINS=Type(06),AuxType(4000),Access(C3)
 GAUNTLET=Type(06),AuxType(4000),Access(C3)

src/prelaunch/galaxian.a

@@ -0,0 +1,31 @@
+;license:MIT
+;(c) 2020 by qkumba
+
+!cpu 6502
+!to "build/PRELAUNCH/GALAXIAN",plain
+*=$106
+
+    !source "src/prelaunch/common.a"
+
+         +ENABLE_ACCEL
+         lda   #$60
+         sta   $5813
+         jsr   $5800      ; decompress
+         ldx   #0
+         stx   $83F
+         inx
+         stx   $847       ; reset vector
+
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$a5
+         sta   $16EA      ; patch - don't increase lives
+         sta   $1751      ; patch - don't decrease lives
++
+         +DISABLE_ACCEL
+         jmp   $800
+
+!if * > $1C0 {
+  !error "code is too large, ends at ", *
+}