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vlait last won the day on April 17 2014

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About vlait

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  1. vlait


    Any chance you'd consider doing a small production run of the add-on boards ?
  2. vlait


    Congrats! That's a huge change in life... people, weather, culture all very nice but probably quite a bit different to NZ We're practically neighbours now, gimme a shout whenever you're visiting Finland (or Estonia for that matter, it's only a 2 hour ferry from here) The game after 1942 might require more than 1 small fpga
  3. vlait


    Hullo Alex!! What have you been up to ? -V
  4. vlait

    Ultra Tank

    Damn I miss the *old* games... Except clowns which somehow always surfaces again(damn u s.k...) Isn't the timer bound to one of the vs counters like sound ?
  5. vlait

    Ultra Tank

    Could you repost the image (assuming the attachment is one, it can't be downloaded) Gg once again.. haven't even had a chance to check your previous one live yet but wanted to chime in so you know at least someone wants to see more -V
  6. vlait

    Sprint 2

    nice!! The screenshot brings up good memories. Super Bug next ? :DD -V
  7. vlait

    Super Breakout preview

    Nice:) The bronze age games definitely deserve to have more attention! I guess one needs to be past certain age to really appreciate them as most of them really aren't that good compared to post space invaders releases. Otoh many of them are actually protos to modern one button mobile games with less eye candy
  8. vlait

    SPI to initialize TFT

    For the ILI chips you could probably adapt https://github.com/thekroko/ili9341_fpga or yomboprime's yombotft addon for zxuno (also on github) The ILI datasheet also has the info, although in a little less understandable format. br, -V
  9. vlait

    new sound chips ?

    Not sure if anyone noticed but there are a few new chip cores created by jotego who frequents at least on the zxuno and mist forums. https://github.com/jotego/jt51 (link to ym2151 clone, there are also ym2612 and a new take on sn76489) I don't own a synth wing so i've no idea if they would be an useful addition or not, nor how much work they would be to plug in. br, -V ps. the jt51 demo is using a new cycle accurate 6809 core which could be of interest to someone running old synth code on fpga
  10. vlait

    Issues reading SD Card on Classic Computing Shield

    I think designlab has a ready to run example too.
  11. vlait

    FPGA vector games

    i basically gave up after 30 minutes ... an army of new 'U' signals seemed to pop each and every time i thought i'd got them all.. sorry.
  12. vlait

    FPGA vector games

    If you start mame with the '-debug' option you should start up with a really powerful debugger. (with builtin help ) isim seems to want all signals preset or it doesn't do anything meaningful (or maybe i was not patient enough)... it really isn't a 5 minute job to rig up a tb from the sources.
  13. vlait

    FPGA vector games

    did you check with mame debugger where things start to go wrong ? Is it possible one of the input signals is accidentally active when the cpu expects to read rom ? (didn't check the code yet
  14. vlait

    Which FPGA Board Please?

    Hi, Bombjack works ok on Papilio DUO, can't remember if it would be possible to get it running on a PRO (DRAM access time might be the limiting factor) You don't necessarily need a scanline generator, the internal scan doubler can easily be modified to blank(or dim) every second line.
  15. vlait

    Using on-board RAM in designs

    I think there's some merit in trying to use as high level approach as possible since it allows using fat (as an example) formatted cards so the card doesnt have to be dedicated to one task. I've been experimenting with zpu(and z80/6505) floppy emulator for apple2 and the zpu one seems to require a lot less floorspace för the fat access. Having said that the actual floppy-apple io is much easier to implement in hardware because the clocking is guaranteed to be accurate.