+atari2600land Posted July 11, 2016 Author Share Posted July 11, 2016 I have the screen rolling at the start program again. celery7.asm Quote Link to comment Share on other sites More sharing options...
Just Jeff Posted July 11, 2016 Share Posted July 11, 2016 Overscan: sta WSYNC inx cpx #52 bne Overscan 52 lines of overscan? Then you fall into more routines after that? Also your VBLANK is missing again.. Quote Link to comment Share on other sites More sharing options...
tschak909 Posted July 11, 2016 Share Posted July 11, 2016 (edited) Your code needs some sanity, either you have a main loop of like: Start: CLEAN_START ; Handy macro that sets up the VCS MainLoop: jsr VCNTRL jsr VBLANK jsr CHECKSWITCHES jsr DOMOTION jsr PREPSCOREFORDISPLAY jsr KERNEL jsr OVERSCAN jmp MainLoop or you literally arrange the main part of your code to be synchronous with the TV beam, with each of these routines unrolled. -Thom Edited July 11, 2016 by tschak909 Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 11, 2016 Author Share Posted July 11, 2016 OK, I put them in a main loop like you suggested and a comb line appeared! I don't know why. So not wanting that in there, I changed the COLUBK to 0 to "cover" it up, and changed the eye around. Player 1 (the incinerator) will have to be white now instead of blue since missile0 is now the whites of his eye instead of the dot. celery7.zip Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 12, 2016 Author Share Posted July 12, 2016 Minor adjustment so the white flash at the beginning is lessened. celery7a.zip Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 12, 2016 Author Share Posted July 12, 2016 I'm using this code to make the player0 move right. But when I put the player1 in, it was moving left. How do I stop that from happening? PositionSprites ; Set the horizontal position of the two sprites, based upon their coordinates ; This uses the tricky 2600 method of positioning (RESPx, HMPx, etc) ; Algorithm invented a looong time ago by persons unknown ; Re-invented Feb2001 by yours truly, then optimised according to code by Thomas Jenztsch sta WSYNC sta HMCLR ; clear any previous movement ldx #2 ; sprite index PosSP lda Player1X-1,x tay lsr lsr lsr lsr sta PS_temp tya and #15 clc adc PS_temp ldy PS_temp cmp #15 bcc NH sbc #15 iny NH ; Use remainder for fine adjustment eor #7 asl asl asl asl sta HMP0-1,x ; fine movement sta WSYNC jsr Ret bit 0 ; 15 cycles = 3 loops Jiggle dey bpl Jiggle sta RESP0-1,x dex bne PosSP sta WSYNC sta HMOVE sta WSYNC Ret rts Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 12, 2016 Author Share Posted July 12, 2016 There. I think I figured it out. Next up, trying to figure out Y positioning. Discovered that "PlayerX ds 2" meant that PlayerX was holding both X positions, and that player 1x's was accessible by using PlayerX+1, which means an entirely different thing in bB. celery8.zip Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 12, 2016 Author Share Posted July 12, 2016 It doesn't look good. Mr. Celery can't be on the screen because I apparently added too much stuff. And when the vegetarian gets in the range of the incinerator, the scanline count increases by 1. I tried everything and nothing will make it stop. celery9.asm Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 13, 2016 Author Share Posted July 13, 2016 Let me ask you a question. Why would this work sometimes: ; Clear RAM and all TIA registers ldx #0 lda #0 Clear sta 0,x inx bne Clear Up until a certain point. I thought I was going insane because this new version was working well on Stella but didn't display anything on real hardware. So I tried replacing that bit of code with CLEAN_START and it suddenly started displaying it correctly on a real 2600 with Harmony cart. Anyway, a lot has changed. I had to move the celery down since he was apparently taking up too much room. Now he's lurking at the bottom looking upwards at you playing the game. You can move the incinerator up and down with the joystick. That's pretty much what I have so far. It is really really hot in here, even at 11:30pm, so I'm going to quit for today. celery9a.zip Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 13, 2016 Author Share Posted July 13, 2016 Added collision detection and sound. celery10.zip Quote Link to comment Share on other sites More sharing options...
Just Jeff Posted July 13, 2016 Share Posted July 13, 2016 I did notice the simplicity of your routine. Here's the Kirk Isreal version: SEI ;Disable Any Interrupts (hey look! we can put comments here) CLD ; Clear BCD math bit. LDX #$FF ; put X to the top... TXS ; ...and use it reset the stack pointer Quote Link to comment Share on other sites More sharing options...
Just Jeff Posted July 13, 2016 Share Posted July 13, 2016 And this: Sorry. LDA #0 ;Put Zero into A, X is at $FFClearMem STA 0,X ;Now, this doesn't mean what you think... DEX ;decrement X (decrease X by one) BNE ClearMem ;if the last command resulted in something ;that's "N"ot "Equal" to Zero, branch back ;to "ClearMem" Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 13, 2016 Author Share Posted July 13, 2016 Why doesn't the random code in CollectMini work when I insert it in my game? I'm assuming it's because the computer hates me. celery11.asm Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 14, 2016 Author Share Posted July 14, 2016 I fixed it, although it's now random, it starts at the same y position every time. All the rest of the positions are random. celery11.zip 1 Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 14, 2016 Author Share Posted July 14, 2016 (edited) The Celery came back in full view. This took all night to do. I will need help with a score though. celery12.zip Edited July 14, 2016 by atari2600land Quote Link to comment Share on other sites More sharing options...
Just Jeff Posted July 14, 2016 Share Posted July 14, 2016 Nice shredder sound Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 15, 2016 Author Share Posted July 15, 2016 (edited) Even though my hand hurts, I worked on this a little bit adding the reset switch in to start new games. I do have a question though. When I go to compile the game, it always has a message saying NO_ILLEGAL_OPCODES is an unrecognized symbol. Nowhere in the code did I type in NO_ILLEGAL_OPCODES, and the game works, but I would like to have some idea as to how much free space I have left. celery13.zip Edited July 15, 2016 by atari2600land Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 15, 2016 Author Share Posted July 15, 2016 I stared at the computer for so long I'm sick. Nevertheless, I finally figured out how to take the "jump" out of the beginning. Let me know what you think. If all looks good, then the score is next. I can't do a score, so it would be really helpful if someone could help me with that. celery13a.zip Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 15, 2016 Author Share Posted July 15, 2016 (edited) Sorry about the profanities in my code. Here is a clean version. I guess I should mention I changed it so the button press starts a new game. celery14.zip Edited July 15, 2016 by atari2600land Quote Link to comment Share on other sites More sharing options...
tschak909 Posted July 15, 2016 Share Posted July 15, 2016 Looking at Collect/CollectMini will show you how to implement a playfield based score routine. It's explained in one of the blog posts. http://atariage.com/forums/blog/blog-148/cat-188-collect -Thom Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 16, 2016 Author Share Posted July 16, 2016 (edited) Score added. But it's a two digit score. I see that there would be room for a third digit after the second one (or is that before the second one?), but not enough room for a fourth digit. Could anyone explain how to make a third digit appear after the second one (preferably after the score reaches 99). After the score is done, I'll try to work on increasing the vegetarian's speed as time goes on. After all, I don't want it to be really easy (and boring) to get 999 points. celery15a.zip Edited July 16, 2016 by atari2600land Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 16, 2016 Author Share Posted July 16, 2016 So what I've decided to do is make a four-digit score. The first two digits are the thousands and hundreds, while the second two are the tens and ones. Unfortunately, there's a big huge gap between the numbers. I tried and failed to try to get the second set of numbers closer to the first two using PF2. I read that PF2 is backwards, so I put in a second set of backwards numbers to use for PF2, but I can't figure it out. I'm hoping that someone can look at the code and revise it so that the four-digit number is a four digit number with no huge gap between the numbers. (I've made the score start at 98 just to test to see if it would go to 100). celery15b.asm Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 16, 2016 Author Share Posted July 16, 2016 I tried to fix it myself, but the score came out all wonky looking. The code for the score is lines 218-289 in case you want to take a look and see what's wrong. celery15bb.asm Quote Link to comment Share on other sites More sharing options...
+SpiceWare Posted July 16, 2016 Share Posted July 16, 2016 I tried to fix it myself, but the score came out all wonky looking. The code for the score is lines 218-289 in case you want to take a look and see what's wrong. Looks fine to me, similar to how it was done in Space Invaders Quote Link to comment Share on other sites More sharing options...
+atari2600land Posted July 16, 2016 Author Share Posted July 16, 2016 I wanted a good solid score. Is that possible? Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.