Jump to content
Have You Played Atari Today?
2600|5200|7800|Lynx|Jaguar|Forums|Store  

khryssun

Members
 View Profile  See their activity

  • Content Count

    810

  • Joined

  • Last visited

Posts posted by khryssun

  2. Posted

    Oooops I made a mistake :ponder:

     

    Please remove my Highscore of 7852... I just notice I had misplaces the difficulty switch of my 7800 (A and B isn't indicated so I played in novice mode insteed of expert). :x

     

    The best score I made with the right configuration is 3775.

     

    I played only 3 games but I have no longer fun to play reactor... so this will be my last submission.

     

    Thanks

  6. Posted

    I finaly broke the 100,000 points limit :)

    My last Highscore is 100,180 :D

    I loose my ship just because I wanted to look at the score. :x :x :x A fatal error.

     

    Not really a tip but an advice : At highest levels, never look at your score before the end of the game.

     

    I'll try to do better tomorrow :roll:

     

    good night

  10. Posted

    The database generally doesn't contain listings for PAL games where there is an NTSC counterpart. Most of the PAL entries are for games that were never released in the US. This is mostly pirate games' date=' but there are various games released by US companies that never made it here (several by Atari, for instance).

     

    ..Al[/quote']

     

    Hi,

    I understand this point of view, but don't you think it will be interesting for PAL users to have a rarity guide with all the format availables for each game ? I just submit this idea because sometimes, before purchasing a NTSC game for our PAL/SECAM VCS, I'd prefer to know (and I think I'am not the only one in this case) if a PAL version was produced, just because it works better.

     

    Adding such info (no need to add the rom file) will make the AtariAge Rarity Guide the most comprehensive of the ones existing on the web ;-)

     

    Thanks

    Chris

  11. Posted

    The PAL stuff is still there' date=' the search page defaults to NTSC only so you probably need to change it to "all".

     

    Mitch[/quote']

     

    I'm pretty sure I've changed it to ALL and I've made no mistake... :?

     

    To be sure, I just try to search for "Space Invaders" with REGION [All] and TV FORMAT [All] and the list generated displays only NTSC format....

    it's the same with pac man and so on....

     

     

    There might be a bug somewhere....

     

    Please make a test

     

    Thanks

     

    Chris

  12. Posted

    Hi,

     

    If I'am not wrong, it seems you have removed Pal versions of some games of the list.

     

    e.g. Star Wars - The Empire Strikes Back isn't listed, Pac Man neither...

     

    It was very useful to know all the format produced for each game.

     

    even if you don't know the rarity of the PAL versions it'd be interesting to know that such game or another is available in this format or not.

     

    can't you update the database in this way please ?

     

    Thanks,

    Chris

  16. Posted

    Is it me or there are some problems with the Stella mailling list ?

     

    I haven't received anything since some days, I tried to post on it some hours ago but I haven't received the message I've posted yet. :?

     

    What about all other stella users ?

    Is it working for you ?

  20. Posted

    And here's the explanation of this by Chris Wilkson :

     

    (BTW, Erik you were right on how it works.  Here's why.)

     

    The timer is in fact decremented immediately.  But that's not what causes the confusion.  Your code checks to see if the timer is zero and branches as soon as this happens.  

    But remember that the RIOT's timer ends at the *end* of the zero count, not the beginning.

     

    Thanks all ;)

  21. Posted

    I received this answer from Erik Mooney (on the stella list) that solve the problem.

     

    I post it, it may be helpful to other programmers.

     

    Many thanks Erik ;-)

     

    > - Storing 43 into TIM64T burns 43*64 = 2752 cycles

     

    Not exactly.  Based on a quick test in PCAEWin's debugger, when you

    store 43 into TIM64T, it *immediately* decrements to 42, then waits

    64 cycles before decrementing to 41, 40, and so on. Storing 43 to  

    TIM64T

    actually makes INTTIM reach 0 at 1+42*64 = 2689 cycles later, or only

    35.38 scanlines later.

     

    Either store 44 instead of 43 to TIM64T (which is how the sample code

    from Nick Bensema's original "How To Draw A Playfield" does it,  

    although

    the comments are misleading), or use BPL instead of BNE (which will

    make it wait an extra 64 cycles until the 0 in INTTIM decrements to  

    $FF.)

     

    (At least I believe this is the answer, although I could be wrong. :) )

  22. Posted

    Here is a mysterious bug in the VBLANK routine in the program below.

    The VBLANK routine burns 36 scanlines instead of 37 !

     

    See the comments I put into the code for more explanations,

    if you have an answer to this riddle, it's welcome...

    This bug drives me crazy ;)

     

     

                  processor 6502 

              include "vcs.h" 

              include "macro.h" 

               

              SEG 

              ORG $F000 



Reset 



 ; Clear all and Set Stack Pointer to #$FF  

       

              SEI

              CLD	

              LDX #$FF

              TXS

              LDA #0

Clear_Mem

              STA 0,X

              DEX

              BNE Clear_Mem	



              LDA #$80        ; Blue

              STA COLUBK      ; Set Background

              



 ; Start to Build Frame



Start_Frame 

        

 ; Start of Vertical Blank 



              LDA #2 

              STA VSYNC 



              STA WSYNC 

              STA WSYNC 

              STA WSYNC        ; 3 Scanlines of VSYNC



              LDA #0 

              STA VSYNC            

               

 ; Start of Vertival Blank

 ; Count 37 Scanlines------------ Start

              LDA  #43          

              STA  TIM64T      



Wait_VBLANK_End

              LDA INTIM                 

              BNE Wait_VBLANK_End       

              STA WSYNC         



 ; Count 37 Scanlines------------ End



 ; In fact the code above (between ---Start & ---End)

 ; burns only 36 Scanlines !!! 

 ; In theory it should burns 37 Scanlines :

 ; 43*64 cycles = 2752 cycles

 ; 2752 cycles / 76 cycles per Scanline = 36.21

 ; Waiting the end of the current scanline drawn  

 ; with STA WSYNC should lead to 37 Scanlines. Right ?

 ; 

 ; In practice it's WRONG : it burns only 36 !?!

 ; Use DOS version of Z26 and press ALT 9 to display

 ; the number of scanlines drawn : 

 ; you'll see 261 instead of 262...

 ;

 ; Replace this part of code with basic following code :

 ;

 ;      LDX 37

 ; Vertical_Blank  

 ;      STA WSYNC 

 ;      DEX 

 ;      BNE Vertical_Blank 

 ;

 ; And it will work (total = 262 scanlines)

 ; Where is the bug in the first code ???

                                                 

              LDA #0 

              STA VBLANK       ; Enable TIA Output

                               

 ; Display 192 Scanlines 

       

              LDY #192         ; 192 Scanlines

Picture                          

              STA WSYNC        

              DEY              ; End of Picture ?

              BNE Picture      ; No = Continue

               

      

 ;        Frame Ends Here                    

     

              LDA #%00000010 

              STA VBLANK       ; Disable TIA Output 





 ; 30 Scanlines of Overscan

       

              LDX #30 

Overscan        

              STA WSYNC 

              DEX 

              BNE Overscan 



              JMP Start_Frame  ; Build Next Frame 





              ORG $FFFA 



Interrupt_Vectors 



              .word Reset      ; NMI 

              .word Reset      ; RESET 

              .word Reset      ; IRQ 



      END

  23. Posted

    For those wondering what is this game, here is the pic (C64 version) :

     

    Silicon_Warrior.gif

     

    and the manual :

     

    Silicon Warrior

     

    This is the year 2084. The Earth Houses in Silicon Valley are troubled,  

    because the Syborgs, a superhuman race of technocrats, have invented  

    the 10th Generation computer. The Syborgs have sworn to give the secret  

    Source Code of this computer to the Earth House which proves to be most  

    technologically aggressive. The ultimate one-to-one combat is to take  

    place in a futuristic battle grid somewhere in outer space. You are one of  

    the chosen Warriors! Can you outwit the Syborgs and win the five battles  

    to become Master Silicon Warrior ?

     

    Features

     

    4 skill levels, 1-4 players, Joystick controlled

     

    Objective

     

    To link five programmed chips of the grid in a diagonal, vertical or  

    horizontal row. To do so you must teleport from chip to chip,  

    programming them in your language colour. If you succeed, the Score  

    Code will be revealed.

     

    Joystick Controls

     

    To select the number of players and skill levels - push joystick forward or  

    back to  move the cursor, then press fire button.  

     

    To teleport yourself from chip to chip - move joystick vertically or  

    hrizontally. You cannot move diagonally.  

     

    To aim and fire your laser - first press and hold the fire-button, then  

    move joystick in the direction you wish to fire.  

     

    To shield yourself from enemy fire - return joystick to neutral position  

    then press fire button.  

     

    Silicon Warrior © 1983 Epyx

     

    Hope this'll help ;)

     

    Chris

  25. Posted

    Osmeroid wrote

    Hey that thing is awesome!  8)  

     

    Thanks fellow !!! ;)

     

     

    Osmeroid wrote

    Is there a way to alter colour using TIA Paint?  

     

    Not for now, but I plan to add the select Background/Playfield colour

    feature in the next version (and to add support for PAL / SECAM colour

    palettes) :D

     

    As you know Playfield colour is define by the write address COLUPF.

    So I'll just add the numbers of the colour used for the background and the

    playfield in the header of the code generated. It will looks like that:

     

    ; Colour used for the Background (COLUBK) = #$00

    ; Colour used for the Playfield (COLUBK) = #$66

     

    This may help, but you know that you can change the COLUPF and the

    COLUBK value every scanline or even many times in the same scanline. ;)

     

     

    Take care,

    Chris

AtariAge
Forums
Store
General
Follow AtariAge

Copyright ©1998-2021 AtariAge

×
×
  • Create New...