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Thelen

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Posts posted by Thelen

  8. Posted

    ah, now is see, you want to make an eprom programmer for the atari 8 bit :wink: I was thinking it was for a pc :wink:

     

    The programming voltage is indeed a problem....and the pins on the joystic port too. Now i'm thinking about that, why not make some kind of cartridge that can program eproms ?

     

    Thelen

  9. Posted

    a dc->dc converter is a regulator, when having a DC voltage of 18V, and connect it to a 7812 regulator, the output will be 12V......connect it to a 7805 regulator, you will have 5 volts as output.... but i don't really see the problem, when programming an 2732 eprom, 12V model, you can just connect the program voltage constant to VPP, Only when /CE is lowerd for the right programming time, the data will be put in the eprom.

     

    thelen

  10. Posted

    I don't think it's difficult to get a 12V programming pulse ? just use a 7812 regultor, and you can use a thryristor to switch it on or off ?

     

    over the years I've built lot's of things, sort of eprom programmers too, but a little more specialized, Ram cartridge programmers fot the atari 2600 and atari 8 bit

     

    Thelen

  11. Posted

    What kind of eeprom is it ? not a serial one ? :wink: It will work, but how many ns is the acces time of an eeprom and a epprom ? When the atari won't get it's data within a certain time, it will hang....

     

    Thelen

  15. Posted

    Great news to hear this game will appear on the 8 bit machines !!

     

    I think a disk image will be the best idea, almost every 8 bit user is using disk images instead of real disks, and all game carts are available in disk form.

     

    Off course, a cartridge is much more spectaculair I think....when I ever finish a game, I will release it as cart (image) and as diskimage I think. as Callipygous and Video game addict are saying, there are less atari 8 bit cart collectors out there

     

    Thelen

  20. Posted

    The only thing that's missing are the sprites i think. Ok, we have 4 one color player/missiles. In my opinion it would have been a good idea to upgrade the atari 8 bit line in 1984 with some extra hardware, with some sort of sprite chip. Maybe a nice homebrew hardware project ? ;)

     

    Thelen

  22. Posted

    you don't have to use multiple charsets either, you can also copy new data to the character location in the characterset! so you can get many animation for various chars, and nu need for 10 charsets !

     

    instead of using 2 scrolling antic 4 lines, you can also use a player. the same player can horizontally reused for stars etc.

     

    I think there will be enough time to give your sprites a new position.

     

     

    keep us informed about your progress !

     

    Thelen

  23. Posted

    how can you do lots of sprites in antic mode 4 ? It can be done off course, but then all the objects are moving blocky....or do you want it to go smooth ? Is it then so that every sprite should have some empty characters, so that it can scroll into it. but then if you have 10 sprites (1 character) you will need 10 empty characters, or if you want to scroll to 8 ways, in example up-right, you will need 2 empty characters.. am i right ?

     

    Thelen

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