+Random Terrain Posted September 7, 2010 Share Posted September 7, 2010 (edited) The bB page has this: dim sc1 = score dim sc2 = score+1 dim sc3 = score+2 But I've seen people post this: dim sc0 = score dim sc1 = score+1 dim sc2 = score+2 I tried both and no matter what I try, I can't get a game to remember the high score. I thought the following would work, but it doesn't: if sc1 > High_Score01 then High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 : goto Skip_High_Score if sc2 > High_Score02 then High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 : goto Skip_High_Score if sc3 > High_Score03 then High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 Skip_High_Score I even reversed the order in case sc1 is on the right instead of the left and that doesn't work either. What do I need to do? Thanks. Update The problem has been solved: http://www.atariage.com/forums/topic/168926-how-do-we-keep-a-high-score/page__view__findpost__p__2089754 Edited September 8, 2010 by Random Terrain Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/ Share on other sites More sharing options...
GroovyBee Posted September 7, 2010 Share Posted September 7, 2010 For a 24 bit comparison you need to start with the high order byte first and work your way down. It'll end up with something like this :- if sc3>hs3&&sc2>hs2&&sc1>hs1 hs3=sc2:hs2=sc2:hs1=sc1 Where :- sc3=score bits 16 to 23 sc2=score bits 8 to 15 sc1=score bits 0 to 7 Not tested but it should work. Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089015 Share on other sites More sharing options...
+Random Terrain Posted September 7, 2010 Author Share Posted September 7, 2010 (edited) if sc3> hs3 && sc2 > hs2 && sc1 > hs1 then hs3=sc3 : hs2=sc2 : hs1=sc1 Thanks. Nope, doesn't work. I even tried this: if sc3 >= High_Score03 && sc2 >= High_Score02 && sc1 >= High_Score01 then High_Score03=sc3 : High_Score02=sc2 : High_Score01=sc1 Since we are using AND, everything has to be greater than or equal, so if my high score is 60, then I get a high score of 110, although 110 is greater than 60, 10 is not greater than 60, so it doesn't get recorded. I modified the reverse of what I posted and this seems to work: if sc3 > 0 && sc3 > High_Score03 then New_High_Score if sc2 > 0 && sc2 > High_Score02 then New_High_Score if sc1 > 0 && sc1 > High_Score01 then New_High_Score goto Skip_High_Score New_High_Score High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 Skip_High_Score [The code I posted above is crap. See my next post.] When I tested starting with sc3 and working down to sc1, it wasn't working because I didn't use sc3 > 0 &&. It's always some simple thing that screws everything up. Unless somebody has a more crunched down version of what I posted, I'll just use it as it is. Edited September 7, 2010 by Random Terrain Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089067 Share on other sites More sharing options...
+Random Terrain Posted September 7, 2010 Author Share Posted September 7, 2010 (edited) Forget what I posted about sc3 > 0 &&, now it seems to be working without it: if sc3 > High_Score03 then New_High_Score if sc2 > High_Score02 then New_High_Score if sc1 > High_Score01 then New_High_Score goto Skip_High_Score New_High_Score High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 Skip_High_Score I don't get it. It wasn't working, but now it is. Maybe I was using >= in my test before and I forgot about it. That has to be what happened. If someone else tests this and it seems to work for them too, I can put a version of this on the bB page to help new users who want to record a high score too. Edited September 7, 2010 by Random Terrain Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089077 Share on other sites More sharing options...
+Random Terrain Posted September 7, 2010 Author Share Posted September 7, 2010 If someone else tests this and it seems to work for them too, I can put a version of this on the bB page to help new users who want to record a high score too. I'll post a little test program here in a few minutes. Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089091 Share on other sites More sharing options...
GroovyBee Posted September 7, 2010 Share Posted September 7, 2010 Unless somebody has a more crunched down version of what I posted, I'll just use it as it is. I can get the comparison down to 6 instructions and a single branch with another 6 instructions for the data move in 6502 assembler. Probably not what you meant tho . 1 Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089095 Share on other sites More sharing options...
+Random Terrain Posted September 7, 2010 Author Share Posted September 7, 2010 (edited) [Posted a program here, but it wasn't working correctly, so I removed it.] Edited September 8, 2010 by Random Terrain Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089155 Share on other sites More sharing options...
+Philsan Posted September 7, 2010 Share Posted September 7, 2010 if sc3 > High_Score03 then New_High_Score if sc2 > High_Score02 then New_High_Score if sc1 > High_Score01 then New_High_Score goto Skip_High_Score New_High_Score High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 Skip_High_Score I am interested too! Then, how do I display the high score? score=??????? Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089359 Share on other sites More sharing options...
+Random Terrain Posted September 7, 2010 Author Share Posted September 7, 2010 (edited) I am interested too!Then, how do I display the high score? score=??????? Here's part of the code from my program: rem **************************************************************** rem * Setup for the restart loop. rem * Master_Counter=0 : Frame_Counter=0 : Flip_Score=0 : Debounce_Reset{1}=1 RS01=sc1 : RS02=sc2 : RS03=sc3 Loop_Ready_to_Restart rem **************************************************************** rem * Set sprite color, color of top playfield row, rem * background color, turn on side borders, and rem * flip sprite if necessary. rem * COLUP0=10 : COLUPF = $CE : COLUBK=$80 : PF0 = %11110000 : REFP0=Flip_P0 rem **************************************************************** rem * Go to title screen after 30 seconds if player does nothing. rem * Also shows high score every 2 seconds. rem * Master_Counter=Master_Counter+1 if Master_Counter < 60 then Skip_30_Counter Frame_Counter=Frame_Counter+1 : Flip_Score=Flip_Score+1 : Master_Counter = 0 if Frame_Counter = 30 then Game_Over{0} = 0 : goto Start_Restart bank1 if Flip_Score = 2 then Flip_Score=0 : Swap_Scores{2}=!Swap_Scores{2} if !Swap_Scores{2} then scorecolor = $AE : sc1=High_Score01 : sc2=High_Score02 : sc3=High_Score03 : goto Skip_30_Counter scorecolor = $1C : sc1=RS01 : sc2=RS02 : sc3=RS03 Skip_30_Counter You just copy the score, then flip between the high score and the copy of the score. I'll try to get that demo program working. I don't understand what is wrong with it, so I'll start over and I hope whatever I did to screw it up the first time will be gone. Edited September 7, 2010 by Random Terrain Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089472 Share on other sites More sharing options...
+Philsan Posted September 7, 2010 Share Posted September 7, 2010 dim sc1=score dim sc2=score+1 dim sc3=score+2 dim hisc1=a dim hisc2=c dim hisc3=x ... restart if sc3 > 0 && sc3 > hisc3 then highscore if sc2 > 0 && sc2 > hisc2 then highscore if sc1 > 0 && sc1 > hisc1 then highscore goto skiphighscore highscore hisc1=sc1:hisc2=sc2:hisc3=sc3 skiphighscore sc1=hisc1:sc2=hisc2:sc3=hisc3 goto titlescreen bank2 Surely I am doing something wrong... Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089498 Share on other sites More sharing options...
supercat Posted September 7, 2010 Share Posted September 7, 2010 An efficient multi-byte comparison requires use of the carry flag for multi-precision arithmetic; a three-byte comparison can be done with six instructions totaling 12 bytes to get the result into the carry flag. If multi-precision arithmetic is not available, the logic should be: if score_top > highscore_top then YEP if score_top < highscore_top then NOPE if score_mid > highscore_mid then YEP if score_mid < highscore_mid then NOPE if score_bot > highscore_bot then YEP if score_bot < highscore_bot then NOPE Otherwise, optimal 6502 code would be: lda highscore_bot cmp score_bot lda highscore_mid sbc score_mid lda highscore_top sbc score_top ; Carry will be clear if score > highscore The CMP will clear the carry if score_bot > highscore_bot and set it otherwise. Each SBC will clear the carry if the corresponding byte of score is greater than the corresponding byte of highscore, set it if the corresponding byte of score is less than the corresponding byte of highscore, and leave it alone if they're equal. Thus, the state of the flag after earlier comparisons is relevant only if later bytes are equal. 1 Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089504 Share on other sites More sharing options...
SeaGtGruff Posted September 8, 2010 Share Posted September 8, 2010 An efficient multi-byte comparison requires use of the carry flag for multi-precision arithmetic; a three-byte comparison can be done with six instructions totaling 12 bytes to get the result into the carry flag. If multi-precision arithmetic is not available, the logic should be: if score_top > highscore_top then YEP if score_top < highscore_top then NOPE if score_mid > highscore_mid then YEP if score_mid < highscore_mid then NOPE if score_bot > highscore_bot then YEP if score_bot < highscore_bot then NOPE I think the following should be sufficiently optimized for bB: if score_top < highscore_top then NOPE if score_mid < highscore_mid then NOPE if score_bot < highscore_bot then NOPE score_top = highscore_top : score_mid = highscore_mid : score_bot = highscore_bot NOPE rem * continue Michael Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089567 Share on other sites More sharing options...
+Random Terrain Posted September 8, 2010 Author Share Posted September 8, 2010 I think the following should be sufficiently optimized for bB: if score_top < highscore_top then NOPE if score_mid < highscore_mid then NOPE if score_bot < highscore_bot then NOPE score_top = highscore_top : score_mid = highscore_mid : score_bot = highscore_bot NOPE rem * continue Michael So instead of this: if sc3 > High_Score03 then New_High_Score if sc2 > High_Score02 then New_High_Score if sc1 > High_Score01 then New_High_Score goto Skip_High_Score New_High_Score High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 Skip_High_Score We'd use this: if sc3 < High_Score03 then No_High_Score if sc2 < High_Score02 then No_High_Score if sc1 < High_Score01 then No_High_Score High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 No_High_Score Problem is that doesn't work. A lower part will win over a higher part if the number is larger. So we are back to this: if sc3 > High_Score03 then New_High_Score if sc2 > High_Score02 then New_High_Score if sc1 > High_Score01 then New_High_Score goto Skip_High_Score New_High_Score High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 Skip_High_Score Problem is that it doesn't always work in the little demo program I'm trying to get working. Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089580 Share on other sites More sharing options...
Nukey Shay Posted September 8, 2010 Share Posted September 8, 2010 A highscore is possible when digits are EQUAL as well as greater-than. 1001 is higher than 1000. The above is just checking if any of the 3 BCD's are greater than their highscore counterpart...which is why it doesn't work. Aside from that, you need abandon and skip to the next comparison if the scores are equal. This is simple in asm using a loop. I dunno how to translate that to bB. ;check high score subroutine ldy #$00 ;2 Check_Score_Loop: lda.wy Score,y ;4 cmp.wy HiScore,y ;4 compare the high byte beq Next_Digit ;2 branch if the same (and check next) bcc No_High_Score ;2 branch if lower (and end) bcs Set_HiScore ;2 higher...new high score Next_Digit: iny ;2 bump pointer cpy #$03 ;2 at the end of 3 bytes? bne Check_Score_Loop ;2 branch if not No_High_Score: rts ;2 fell through...no high score Set_HiScore: lda Score ;3 New high score...transfer ram sta HiScore ;3 lda Score+1 ;3 sta HiScore+1 ;3 lda HiScore+2 ;3 sta HiScore+2 ;3 rts ;6 Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089604 Share on other sites More sharing options...
Nukey Shay Posted September 8, 2010 Share Posted September 8, 2010 BTW since bBasic is interpreting...couldn't you just... IF (sc1*10000+sc2*100+sc3) < (High_Score01*10000+High_Score02*100+High_Score03) then No_High_Score ...or is that too complex? 1 Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089610 Share on other sites More sharing options...
+Random Terrain Posted September 8, 2010 Author Share Posted September 8, 2010 (edited) BTW since bBasic is interpreting...couldn't you just... IF (sc1*10000+sc2*100+sc3) < (High_Score01*10000+High_Score02*100+High_Score03) then No_High_Score ...or is that too complex? I'm not using the beta version of bB, so it might be able to handle that. The regular version can't do math in an if-then. We'd have to do this: temp5 = (sc1*10000+sc2*100+sc3) temp6 = (High_Score01*10000+High_Score02*100+High_Score03) if temp5 < temp6 then No_High_Score High_Score01=sc1 : High_Score02=sc2 : High_Score03=sc3 No_High_Score I just tried it and it seems to be working great so far. That seems to be the best solution. Thanks! Edited September 8, 2010 by Random Terrain Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089620 Share on other sites More sharing options...
Nukey Shay Posted September 8, 2010 Share Posted September 8, 2010 (edited) It's still overthinking the solution. SeaG's example is still better. Why didn't it work? Falling through each if-then should only be possible if the scores are at least equal Were you checking from high to low? Edited September 8, 2010 by Nukey Shay Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089624 Share on other sites More sharing options...
+Random Terrain Posted September 8, 2010 Author Share Posted September 8, 2010 It's still overthinking the solution. SeaG's example is still better. Why didn't it work? Falling through each if-then should only be possible if the scores are at least equal Were you checking from high to low? No matter which way I try his example (from sc1 to sc3 or from sc3 to sc1), it doesn't work correctly. So far your last example is the only one that seems to work consistently. Speaking of high to low, the bB page says: If you plan to check the score, you will need to break out its 6 digits into 3 sets of two digits and check each one. One way to pull out the score digits is: dim sc1=score dim sc2=score+1 dim sc3=score+2 sc1 will contain the first two digits, sc2 the 3rd and 4th, and sc3 the last two. I'm not clear about which ones are the first two digits. Are we going from left to right or right to left? Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089641 Share on other sites More sharing options...
+Random Terrain Posted September 8, 2010 Author Share Posted September 8, 2010 Crap! This latest one isn't working consistently either. I tried 530 against 120 and 120 stayed the high score. Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089655 Share on other sites More sharing options...
Nukey Shay Posted September 8, 2010 Share Posted September 8, 2010 (edited) First = left, last = right. sc1 holds the 100&10 thousands digits, sc2 holds the thousands and hundreds, sc3 holds the tens and ones. How about: if sc1 > High_Score01 then YEP if sc1 < High_Score01 then NOPE ;first byte equal...do the next test... if sc2 > High_Score02 then YEP if sc2 < High_Score02 then NOPE ;second byte equal...do the next test... if sc3 > High_Score03 then YEP if sc3 < High_Score03 then NOPE ;all bytes equal goto NOPE YEP: High_Score01 = sc1 High_Score02 = sc2 High_Score03 = sc3 NOPE: goto NOPE isn't needed if you aren't worried about resetting the high score when it's totally equal to the score. You'd need to use it if the game is doing something to signify that the high score was made, tho (such as playing a sound effect). Edited September 8, 2010 by Nukey Shay 1 Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089659 Share on other sites More sharing options...
+Random Terrain Posted September 8, 2010 Author Share Posted September 8, 2010 (edited) First = left, last = right. sc1 holds the 100&10 thousands digits, sc2 holds the thousands and hundreds, sc3 holds the tens and ones. Thanks. I'll add that to the bB page tonight. How about: if sc1 > High_Score01 then YEP if sc1 < High_Score01 then NOPE ;first byte equal...do the next test... if sc2 > High_Score02 then YEP if sc2 < High_Score02 then NOPE ;second byte equal...do the next test... if sc3 > High_Score03 then YEP if sc3 < High_Score03 then NOPE ;all bytes equal goto NOPE YEP: High_Score01 = sc1 High_Score02 = sc2 High_Score03 = sc3 NOPE: goto NOPE isn't needed if you aren't worried about resetting the high score when it's totally equal to the score. You'd need to use it if the game is doing something to signify that the high score was made, tho (such as playing a sound effect). That works better than your last one. I tried 530 against 120 and 530 was the new high score. I'll test some more crazy numbers, but it looks like we might be done: if sc1 > High_Score01 then New_High_Score if sc1 < High_Score01 then Skip_High_Score rem first byte equal...do the next test... if sc2 > High_Score02 then New_High_Score if sc2 < High_Score02 then Skip_High_Score rem second byte equal...do the next test... if sc3 > High_Score03 then New_High_Score if sc3 < High_Score03 then Skip_High_Score rem all bytes equal goto Skip_High_Score New_High_Score High_Score01 = sc1 High_Score02 = sc2 High_Score03 = sc3 Skip_High_Score Thanks again. So far no problems. Now I can get the little demo program finished. Edited September 8, 2010 by Random Terrain Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089662 Share on other sites More sharing options...
Nukey Shay Posted September 8, 2010 Share Posted September 8, 2010 Exactly the same as what supercat posted above...I just changed the variable names to be sure that the tests were being done in the proper order Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089673 Share on other sites More sharing options...
+Random Terrain Posted September 8, 2010 Author Share Posted September 8, 2010 Exactly the same as what supercat posted above...I just changed the variable names to be sure that the tests were being done in the proper order Oh yeah, it is. You sanded it and put a coat of paint on it, though. Thanks goes to supercat and Nukey Shay. Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089694 Share on other sites More sharing options...
+Random Terrain Posted September 8, 2010 Author Share Posted September 8, 2010 (edited) The bB page has been updated: http://www.randomterrain.com/atari-2600-memories-batari-basic-commands.html#score Below is an example program that shows how to save the high score until the game is turned off. Move the joystick up to increase the score. Press the fire button to leave the main loop and the score will flip between the current score and the high score every 2 seconds. Press the fire button or reset switch to go back to the main loop. Here's the .bin file to use with an emulator: ex_save_high_score_2010y_09m_08d_0323t.bin Here's the bB code: ex_save_high_score_2010y_09m_08d_0323t.bas Edited September 8, 2010 by Random Terrain Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089754 Share on other sites More sharing options...
+Gemintronic Posted September 8, 2010 Share Posted September 8, 2010 This really needed to be done. Great work as always RT. Maybe I can modify Drunken Pooper to really have a high score now! 1 Quote Link to comment https://forums.atariage.com/topic/168926-how-do-we-keep-a-high-score/#findComment-2089765 Share on other sites More sharing options...
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