level layout is unpacked on screen correctly
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@ -19,11 +19,12 @@ Address | PRG | Description
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```$0000 - $0001``` | no | hardware
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```$0002 - $00FF``` | no | zero page pointers
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```$0100 - $07FF``` | no | *free ram*
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```$0800 - $0FFF``` | yes | data segment + BASIC autostart
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```$0800 - $0FFF``` | yes | initialized data segment (incl. const) + BASIC autostart
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```$1000 - $1FFF``` | yes | SID tune
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```$2000 - $27FF``` | yes | custom char
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```$2800 - $xxxx``` | yes | program logic (only needed part used)
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```$xxxx - $CDFF``` | no | *free ram*
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```$xxxx - $CCFF``` | no | *free ram*
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```$CD00 - $CDFF``` | no | data segment (not-initialized vars)
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```$CE00 - $CEFF``` | no | list X
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```$CF00 - $CFFF``` | no | list Y
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```$D000 - $DFFF``` | no | I/O
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@ -1,7 +1,6 @@
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TITLE
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xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
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x x
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x x
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x fffffffffff x
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x x
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x x
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x x
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@ -38,8 +37,7 @@ TITLE 2
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..................x.....................
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..................x.....................
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..................x.....................
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..................x.....................
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..................x.....................
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..................x........f............
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..................x.....................
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..................x.....................
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..................x.....................
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16
src/data.asm
16
src/data.asm
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@ -1,4 +1,4 @@
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; Data section
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; Data section - Not initialized variables ($CD00 - $CDFF)
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; ----------------------------------------------------------------------
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; Number of interrupt
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; Used as counter to be decremented to do some things less frequently
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@ -36,18 +36,4 @@ random:
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status:
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BYTE
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; Intro counter
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introCounter:
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BYTE #$4
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; Intro string x position, and next increment
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introX:
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BYTE #$0
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introXinc:
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BYTE #$1
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; Outro delay
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outroDelay
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BYTE #$ff
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17
src/game.asm
17
src/game.asm
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@ -239,6 +239,15 @@ genFoodY: ; calculate `random` modulo 22 (22 = SCREEN_H - 1)
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cmp snakeY
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beq genFood
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foodOK:
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#if DEBUG = 1
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; print choosen X,Y for food
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ldy #$18
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lda calcTileX
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jsr printByte
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ldy #$1b
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lda calcTileY
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jsr printByte
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#endif
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ldy #0
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jsr calcTileMem ; calc food address in memory
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@ -306,12 +315,8 @@ checkEndWallHit:
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lda #$20 ; just put a space to erase snake tail tile
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sta (tileMem),y
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checkLevel:
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; TODO
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lda #WALL_TILE
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sta $460
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lda #WALL_COLOR
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sta $d860
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; lda #WALL_COLOR
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; sta $d860,y
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skipPauseTests:
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@ -38,8 +38,6 @@ upperbarLoop:
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jsr printStatus
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; Init game variables
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lda #FOOD_TILE
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sta $500 ; Put first piece of food
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lda #4
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sta irqn ; Initialize interrupt divider
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lda #6
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@ -65,5 +63,11 @@ clearListLoop:
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cpx #$00
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bne clearListLoop
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; Set current level pointer to list start
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lda #<levelsList
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sta levelPointer
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lda #>levelsList
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sta levelPointer + 1
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rts
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@ -1,13 +1,32 @@
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; Initialized variables
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; ----------------------------------------------------------------------
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; Intro counter
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introCounter:
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BYTE #$4
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; Intro string x position, and next increment
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introX:
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BYTE #$0
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introXinc:
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BYTE #$1
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; Outro delay
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outroDelay
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BYTE #$ff
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; Costants
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; ----------------------------------------------------------------------
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; Status of the game (costants pre-processor defined, sort of enum)
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ST_INTRO0 = 0
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ST_INTRO1 = 1
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ST_PLAY = 2
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ST_OUTRO = 3
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ST_END = 4
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ST_PAUSE = 255
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ST_INTRO0 = 0
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ST_INTRO1 = 1
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ST_LEVELSELECT = 2
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ST_PLAY = 3
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ST_OUTRO = 4
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ST_END = 5
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ST_PAUSE = 255
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; Screen features
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SCREEN_W = 40
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@ -54,3 +73,8 @@ scoreString:
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BYTE "POINTS"
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BYTE #0
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; Levels
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; ----------------------------------------------------------------------
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levelsList:
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INCBIN "../res.bin/levels.bin"
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@ -0,0 +1,72 @@
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statusLevelSelect: ; select new level
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ldy #39
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sty tempPointer
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ldy #$04
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sty tempPointer + 1
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writeLevelLoop:
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ldy #0
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lda (levelPointer),y
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pha
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lda #levelPointer
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sta nextPointerPointer
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ldx #1
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jsr nextPointer
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ldy #0
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lda (levelPointer),y
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pha
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lda #levelPointer
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sta nextPointerPointer
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ldx #1
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jsr nextPointer
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pla
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tay
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tax
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pla
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cmp #0
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beq writeLevelEnd
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writeLevelElement:
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sta (tempPointer),y
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dey
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bne writeLevelElement
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lda #tempPointer
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sta nextPointerPointer
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; x still holds the total number
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jsr nextPointer
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jmp writeLevelLoop
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writeLevelEnd:
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lda #ST_PLAY
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sta status
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rts
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; Input:
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; regX = count
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nextPointer:
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lda #0
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sta nextPointerPointer + 1
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txa
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clc
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ldy #0
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adc (nextPointerPointer),y
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sta (nextPointerPointer),y
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ldy #1
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lda (nextPointerPointer),y
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adc #0
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sta (nextPointerPointer),y
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rts
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23
src/main.asm
23
src/main.asm
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@ -22,13 +22,12 @@
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; Initialized segments
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; ----------------------------------------------------------------------
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SEG dataSegment
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SEG constSegment
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org $801
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INCLUDE "basic.asm" ; BASIC must stay at this address
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INCLUDE "data.asm"
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INCLUDE "const.asm"
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INCLUDE "initdata.asm"
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#if DEBUG = 1
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ECHO "End of Data + Basic Segment. Space left: ",($1000 - .)
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ECHO "End of Initialized Data (const) + Basic Segment. Space left: ",($1000 - .)
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#endif
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@ -65,9 +64,10 @@ tggsFont:
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INCLUDE "outro.asm"
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INCLUDE "program.asm"
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INCLUDE "subroutines.asm"
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INCLUDE "levels.asm"
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#if DEBUG = 1
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ECHO "End of program at: ",.,"Space left:",($ce00 - .)
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ECHO "End of program at: ",.,"Space left:",($cd00 - .)
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#endif
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#if DEBUG = 1
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@ -75,8 +75,19 @@ tggsFont:
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ECHO "PRG size:",([. - $801 + 2]d),"dec"
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#endif
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; Uninitialized list segment
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; Uninitialized segments
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; ----------------------------------------------------------------------
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; Data variables
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; -----------------
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SEG.U dataSegment
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org $cd00
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INCLUDE "data.asm"
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# if DEBUG = 1
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ECHO "End of Data segment. Space left:",($ce00 - .)
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#endif
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; Lists
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; -----------------
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SEG.U listSegment
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org $ce00
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listX DS 256
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@ -75,8 +75,9 @@ intro0end:
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; Set init variables of the game
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jsr gamereset
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; Set status as game playing
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lda #ST_PLAY
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; Set status as level select
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; (then it will enter in status play)
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lda #ST_LEVELSELECT
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sta status
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endless:
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@ -115,24 +116,29 @@ irq:
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; Sort of switch-case
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lda status
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cmp #ST_INTRO0
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bne checkStatus1
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bne checkStatusIntro1
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jsr statusIntro0
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jmp checkEndStatus
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checkStatus1:
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checkStatusIntro1:
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cmp #ST_INTRO1
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bne checkStatus2
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bne checkStatusPlay
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jsr statusIntro1
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jmp checkEndStatus
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checkStatus2
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checkStatusPlay:
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cmp #ST_PLAY
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bne checkStatus3
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bne checkStatusOutro
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jsr statusPlay
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jmp checkEndStatus
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checkStatus3
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checkStatusOutro:
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cmp #ST_OUTRO
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bne checkEndStatus
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bne checkStatusLevelSelect
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jsr statusOutro
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jmp checkEndStatus
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checkStatusLevelSelect:
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cmp #ST_LEVELSELECT
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bne checkEndStatus
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jsr statusLevelSelect
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jmp checkEndStatus
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checkEndStatus:
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#if DEBUG = 1
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@ -12,6 +12,18 @@ printIntroString DS 2
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; Pointer to screen position where to print intro string
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introScreenStart DS 2
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; Pointer to level struct
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levelPointer DS 2
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; Temporary pointer -- Use when you don't call a subroutine
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tempPointer DS 2
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; Pointer for Pointer in the NextPointer routine
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nextPointerPointer DS 2
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; Pointer to string for strlen routine
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strlenString DS 2
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; Note: Locations $90-$FF in zeropage are used by kernal
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@ -4,13 +4,16 @@ using namespace std;
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const int MAXLEN = 64;
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void flush(char last, int count) {
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char tile;
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switch(last) {
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case 'x':
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cout << (char)91; break;
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tile = (char)91; break;
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case 'f':
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tile = (char)90; break;
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default:
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cout << (char)32; break;
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tile = (char)32; break;
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}
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cout << (char)count;
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cout << tile << (char)count;
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}
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int main(int argc, char** argv) {
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@ -20,17 +23,18 @@ int main(int argc, char** argv) {
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while (true) {
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cin.getline(line, MAXLEN);
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if (line[0] == 'Z') break;
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cout << line << '\0'; /* the title */
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// cout << line << '\0'; /* the title */
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int count = 0;
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char last = '\0';
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char current = '\0';
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while(true) { //for (int i = 0; i < 25; ++i) {
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while(true) {
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cin.getline(line, MAXLEN);
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if (line[0] == 'z') {
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flush(current, count);
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cout << '\0' << '\0';
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break;
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}
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@ -47,4 +51,6 @@ int main(int argc, char** argv) {
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}
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}
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}
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cout << '\0' << '\0';
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}
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