Meteors added :)

Atari/gr_basics.asm

@@ -161,6 +161,36 @@ ClearPlot
     rts
 .endp
 
+; -----------------------------------------
+.proc ExPlot  ;ExPlot (EplotX, EplotY)
+; EOR plot:
+; Inverts color of a pixel
+; Note: No coordinate control!!!
+;       With off-screen coordinates, it can damage main program.
+; -----------------------------------------
+    ; let's calculate coordinates from xdraw and ydraw
+    ;xbyte = xbyte/8
+    lda EplotX+1
+    lsr
+    lda EplotX
+    ror ;just one bit over 256. Max screenwidth = 512!!!
+    lsr
+    lsr
+    sta EplotByte
+    ;---
+    ldx EplotY
+    ldy linetableL,x
+    lda linetableH,x
+    sta EplotByte+1
+
+    ldx EplotX   ; optimization (256 bytes long bittable)
+
+    lda (EplotByte),y
+    eor bittable1_long,x
+    sta (EplotByte),y
+    rts
+.endp
+
 ; -----------------------------------------
 .proc point_plot
 ; -----------------------------------------

Atari/interrupts.asm

@@ -142,6 +142,54 @@ lab2
     jsr RASTERMUSICTRACKER+3    ;1 play
     ; ------- RMT -------
 SkipRMTVBL
+    ; ------ meteors ------ start
+    bit Mcounter
+    bpl MeteorOnSky
+    bit MeteorsFlag
+    bmi SkipMeteors
+    ; randomize meteor
+    lda random
+    and #%11111111
+    bne SkipMeteors
+    lda random
+    sta Mpoint1X
+    sta Mpoint2X
+    lda #0
+    sta Mpoint1X+1
+    sta Mpoint2X+1
+    lda random
+    and #$1f
+    sta Mpoint1Y
+    sta Mpoint2Y
+    mva #10 Mcounter
+MeteorOnSky
+    lda Mpoint1Y
+    cmp #64
+    beq NoFirstPlot
+    sta EplotY
+    inc Mpoint1Y
+    mwa Mpoint1X EplotX
+    inw Mpoint1X
+    jsr Explot
+NoFirstPlot
+    lda Mcounter
+    beq @+
+    dec Mcounter
+    bpl SkipSecondPlot
+@   lda Mpoint2Y
+    cmp #64
+    bne GoSecondPlot
+    mva #$ff Mcounter
+    bmi SkipMeteors
+GoSecondPlot
+    sta EplotY
+    inc Mpoint2Y
+    mwa Mpoint2X EplotX
+    inw Mpoint2X
+    jsr Explot
+SkipSecondPlot
+SkipMeteors
+    ; ------ meteors ------ end
     bit ScrollFlag
     bpl EndOfCreditsVBI
 CreditsVBI

artwork/talk.asm

@@ -45,7 +45,7 @@
     dta d"HASTA LA VISTA, BABY!"^
     dta d"THIS IS YOUR BRAIN ON SCORCH."^
     dta d"TAKE THIS!"^
-    dta d"THIS SCREEN AIN'T BIG ENOUGH FOR THE BOTH OF US."^
+    dta d"THIS SCREEN AIN'T BIG ENOUGH FOR US."^
     dta d"DIE, ALIEN SWINE!"^
     dta d"AWRUK!!!"^
     dta d"I SHALL OIL MY TURRET WITH YOUR BLOOD."^
@@ -78,12 +78,12 @@
     dta d"OH MAN!"^
     dta d"DOOUGH!"^
     dta d"NEW DAY, NEW BOMB."^
-    dta d"THIS IS THE END, MY ONLY FRIEND."^
+    dta d"THIS IS END."^
     dta d"VERY FUNNY."^
     dta d"THE FAT LADY SANG."^
-    dta d"WHY DOES EVERYTHING HAPPEN TO ME?"^
+    dta d"WHY DOES HAPPEN TO ME?"^
     dta d"I'M GOING DOWN."^
-    dta d"I'VE GOT A BAD FEELING ABOUT THIS."^
+    dta d"I'VE GOT A BAD FEELING."^
     dta d"CRAPOLA."^
     dta d"POW!"^
     dta d"BIF!"^

game.asm

@@ -42,6 +42,7 @@ MainGameLoop
     jsr RoundInit
 
     jsr MainRoundLoop
+    mva #$ff MeteorsFlag
     bit escFlag
     jvs GoGameOver
     bmi START
@@ -360,6 +361,8 @@ CheckNextTankAD
     jsr PutTankNameOnScreen
 ;    jsr DisplayStatus    ; There is no need anymore, it is always after PutTankNameOnScreen
 
+    mva #0 MeteorsFlag
+    
     lda SkillTable,x
     beq ManualShooting
 
@@ -392,6 +395,7 @@ ManualShooting
     spl:rts        ; keys Esc or O
 
 AfterManualShooting
+    mva #$ff MeteorsFlag
     mva #$00 plot4x4color
     jsr DisplayTankNameAbove
     ; defensive weapons without flight handling

scorch.asm

@@ -26,7 +26,7 @@
 
 ;---------------------------------------------------
 .macro build
-    dta d"1.37" ; number of this build (4 bytes)
+    dta d"1.38" ; number of this build (4 bytes)
 .endm
 
 .macro RMTSong
@@ -37,6 +37,17 @@
 ;---------------------------------------------------
     icl 'definitions.asm'
 ;---------------------------------------------------
+AdditionalZPvariables = $20
+    .zpvar EplotX       .word = AdditionalZPvariables
+    .zpvar EplotByte    .word
+    .zpvar EplotY       .byte
+    .zpvar Mpoint1X     .word   ; meteor first point X position
+    .zpvar Mpoint1Y     .byte   ; meteor first point Y position
+    .zpvar Mpoint2X     .word   ; meteor last point X position
+    .zpvar Mpoint2Y     .byte   ; meteor last point Y position
+    .zpvar Mcounter     .byte   ; meteor length counter ( $ff - no meteor on sky )
+    .zpvar MeteorsFlag  .byte   ; $ff - block meteors
+    
 
 FirstZpageVariable = $51
     .zpvar DliColorBack     .byte = FirstZpageVariable
@@ -374,6 +385,8 @@ NoRMT_PALchange
 
     lda #$ff                    ; initial value
     sta sfx_effect
+    sta Mcounter
+    sta MeteorsFlag
     
     RMTSong 0
 

scorchC64.asm

@@ -35,8 +35,9 @@
     icl 'definitions.asm'
 ;---------------------------------------------------
 
-FirstZpageVariable = $55 ; $57
+FirstZpageVariable = $54 ; $57
     .zpvar DliColorBack        .byte = FirstZpageVariable
+    .zpvar MeteorsFlag      .byte
     .zpvar GradientNr        .byte
     .zpvar GradientColors    .word
     .zpvar WindChangeInRound    .byte    ; wind change after each turn (not round only) flag - (0 - round only, >0 - each turn)