add cheats N, O

res/GAMES.CONF

@@ -265,21 +265,21 @@
 1001,MR=Mr. Robot
 0001,MP=Ms. Pacman
 0000,N.O.R.A.D=N O R A D
-0000,NEON=Neon
+0004,NEON=Neon
 0001,NEPTUNE=Neptune
 0007,NT=Neu][ower
 1000,NEUTRONS=Neutrons
-0000,NIBBLER=Nibbler
+0004,NIBBLER=Nibbler
 0007,NM=Night Mission Pinball
-0000,NIGHT.STALKER=Night Stalker
-0000,NI=Nightmare Gallery
-0000,OM=O'Riley's Mine
+0001,NIGHT.STALKER=Night Stalker
+0001,NI=Nightmare Gallery
+0001,OM=O'Riley's Mine
 0001,OID.ZONE=Oid Zone
 1001,OI=Oil's Well
-1000,ON.THE.RUN=On The Run
+1001,ON.THE.RUN=On The Run
 0007,ORBITRON=Orbitron
 0000,OW=Out of This World
-0000,OUTPOST=Outpost
+0001,OUTPOST=Outpost
 0000,OUTWORLD=Outworld
 0001,PACMAN=Pacman
 0001,PB=Pandora's Box

src/constants.a

@@ -11,7 +11,7 @@
 ; ...unused...
 ; E000..E3FF - HGR font data
 ; ...unused...
-; E77E..FFEB - main program code
+; E76A..FFEB - main program code
 ; FFEC..FFF9 - API functions and global constants available for main program
 ;              code, prelaunchers, transition effects, &c.
 ;              (LoadFileDirect, Wait/UnwaitForVBL, MockingboardStuff, MachineStatus)

src/prelaunch/neon.a

@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2021 by Frank M.
+;(c) 2021-2022 by Frank M., qkumba
 
 !cpu 6502
 !to "build/PRELAUNCH.INDEXED/NEON",plain
@@ -17,9 +17,35 @@
          lda   #1
          sta   $14A0      ; reset vector fix
 
-         +DISABLE_ACCEL
+         +READ_RAM2_NO_WRITE
+         lda   MachineStatus
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #<callback
+         sta   $1667
+         lda   #>callback
+         sta   $1668
+         lda   #$A5
+         sta   $1865      ; patch - don't increase lives
+         sta   $1873      ; patch - don't decrease lives
++
+         jsr   DisableAccelerator
+         +READ_ROM_NO_WRITE
          jmp   $149A
 
+callback
+         jsr   $BD00
+         lda   $7B
+         bne   +
+         dec   $9EC4      ; patch - don't decrease time
+         dec   $9ECC      ; patch - don't decrease time
+         beq   ++
++        cmp   #3
+         bne   ++
+         dec   $9338      ; patch - don't decrease time
+         dec   $9380      ; patch - don't decrease time
+++       rts
+
 !if * > $1C0 {
   !error "code is too large, ends at ", *
 }

src/prelaunch/nibbler.a

@@ -0,0 +1,30 @@
+;license:MIT
+;(c) 2022 by qkumba
+
+!cpu 6502
+!to "build/PRELAUNCH.INDEXED/NIBBLER",plain
+*=$106
+
+    !source "src/prelaunch/common.a"
+
+         +ENABLE_ACCEL
+         lda   #$60
+         sta   $8A19
+         jsr   $6550      ; decompress
+         +READ_RAM2_NO_WRITE
+         lda   MachineStatus
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$EA
+         sta   $11A0      ; patch - don't decrease lives
+         lda   #$A5
+         sta   $12D3      ; patch - don't decrease time
++
+         jsr   DisableAccelerator
+         +READ_ROM_NO_WRITE
+
+         jmp   $900
+
+!if * > $1C0 {
+  !error "code is too large, ends at ", *
+}

src/prelaunch/night.stalker.a

@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2019 by Frank M.
+;(c) 2019, 2022 by Frank M., qkumba
 
 !cpu 6502
 !to "build/PRELAUNCH.INDEXED/NIGHT.STALKER",plain
@@ -18,8 +18,18 @@
          lda   #$FA
          sta   $6496      ; reset vector patch (reboot)
 
+         lda   #$60
+         sta   $2A5
          +DISABLE_ACCEL
-         jmp   $283
+         jsr   $283
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #0
+         sta   $1DEC      ; patch - don't increase lives
+         sta   $13D0      ; patch - don't decrease lives
++
+         jmp   $6000
 
 
 !if * > $1C0 {

src/prelaunch/nightmare.a

@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2020 by Frank M.
+;(c) 2020, 2022 by Frank M., qkumba
 
 !cpu 6502
 !to "build/PRELAUNCH.INDEXED/NI",plain
@@ -27,7 +27,16 @@
          sta   $8CC5
          sta   $8CE2
 
-         +DISABLE_ACCEL
+         +READ_RAM2_NO_WRITE
+         lda   MachineStatus
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$AD
+         sta   $8718      ; patch - don't decrease lives
+         sta   $8980      ; patch - don't increase lives
++
+         jsr   DisableAccelerator
+         +READ_ROM_NO_WRITE
          jmp   $1206
 
 callback sec              ; non-ROM WAIT

src/prelaunch/on.the.run.a

@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2021 by Frank M.
+;(c) 2021-2022 by Frank M., qkumba
 
 !cpu 6502
 !to "build/PRELAUNCH.INDEXED/ON.THE.RUN",plain
@@ -17,6 +17,13 @@
 
 hook     +RESET_VECTOR $100
 
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$A5
+         sta   $DC1       ; patch - don't decrease lives
+         sta   $1FD4      ; patch - don't increase lives
++
          jmp   $800
 
 !if * > $1C0 {

src/prelaunch/orileys.mine.a

@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2019 by Frank M.
+;(c) 2019, 2022 by Frank M., qkumba
 
 !cpu 6502
 !to "build/PRELAUNCH.INDEXED/OM",plain
@@ -22,7 +22,15 @@
          sta   $201B      ; reset vector patch
          sta   $8133      ; (yes, that's 3 times)
 
-         +DISABLE_ACCEL
+         +READ_RAM2_NO_WRITE
+         lda   MachineStatus
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$AD
+         sta   $831C      ; patch - don't decrease lives
++
+         jsr   DisableAccelerator
+         +READ_ROM_NO_WRITE
          jmp   $8FD
 
 !if * > $1C0 {

src/prelaunch/outpost.a

@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2019 by Frank M.
+;(c) 2019, 2022 by Frank M., qkumba
 
 !cpu 6502
 !to "build/PRELAUNCH.INDEXED/OUTPOST",plain
@@ -13,7 +13,16 @@
          jsr   $3EC8      ; decompress/title/set reset vector
 
          +RESET_VECTOR $100
-         jmp   $200
+         lda   #$60
+         sta   $211
+         jsr   $200
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$B5
+         sta   $8086      ; patch - don't decrease lives
++
+         jmp   $8000
 
 !if * > $1C0 {
   !error "code is too large, ends at ", *