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phider

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Space Invader

Space Invader (2/9)

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  1. I have 8 of them, all loose. I want to eventually collect all of them, though.
  2. I got mine (7800) used about a month ago, with 10 games (8 were 7800 games), so I didn't really have a first game. My first two games were asteroids and battlezone. Battlezone is fun, but I've played asteroids a lot more so far. And I've played both of them more than any of the 7800 games...
  3. I've just started with this asm tutorial, and decided to start modifying the first program. I successfully changed the colors, and enabled the 2nd missile and made 2 lines going in opposite directions. Then I decided to try cycling the background color by decrementing it every frame, and wrapping to $FF when it hits zero. I also took out the moving line. I added the following code near the beginning of the main loop, where the tutorial said you could put game logic. ldx COLUBK dex bne SkipReset ldx #$FF SkipReset txa sta COLUBK The background color starts at $FF, and *should* decrement by one every frame. However, instead it changes immediately to a light gray, and stays there. I slowed down the color changing by making it do 50 frames before it changed, and it seemed to change to gray on the first change. Here's the full code: processor 6502 include vcs.h org $F000 Start sei cld ldx #$FF tsx lda #0 ClearMem sta 0,X dex bne ClearMem lda #255 sta COLUBK MainLoop lda #2 sta VSYNC sta WSYNC sta WSYNC sta WSYNC lda #43 sta TIM64T lda #0 sta VSYNC ldx COLUBK ;Here's the code I added dex bne SkipReset ldx #$FF SkipReset txa sta COLUBK ;End of added code WaitForVblankEnd lda INTIM bne WaitForVblankEnd ldy #191 sta WSYNC sta VBLANK ScanLoop sta WSYNC dey bne ScanLoop lda #2 sta WSYNC sta VBLANK ldx #30 OverScanWait sta WSYNC dex bne OverScanWait jmp MainLoop org $FFFC .word Start .word Start
  4. I was wondering if anyone knows of a plain text printable version of the rarity guide, preferably in alphabetical order. I'd like to print out a copy or two to keep in the car(s) in case I find some games at goodwill, etc, and want to check the rarity without having to find wifi. I know there are about 5 of these for NES, because I just found them and printed one, so I don't know why there wouldn't be one (or more) for atari.
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