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Recent content by GeekDot

  1. GeekDot

    Building an internal grayscale card for the SE/30

    Here's another teaser 😁... in hardware ;-) So at least a bit of acceleration.
  2. GeekDot

    Building an internal grayscale card for the SE/30

    This is correct... at the moment. The original Formac ProNitron card on which this design is based used a software controllable "switch" to change the video clock(-devider) so that it could display 1- and 8-bit. @Bolle had a hard time fiddling with this and ended up doing "8bit only" for now...
  3. GeekDot

    Building an internal grayscale card for the SE/30

    Just as an appetizer and to soothe your concerns... it's not really slowing things down. Here's the Speedometer 4.02 QuickDraw benchmark comparison to a Color Classic. ...aaaand that's at the same resolution as the Color Classic (i.e. 512×384, not 512x342) [Yes, that's a really battered...
  4. GeekDot

    Building an internal grayscale card for the SE/30

    0, 1 and every unfractioned number until infinity is an integer;-) All used in this case is the CPU and the bus. Very simple said: the CPU writes bytes over thr bus into video RAM. A digital-analog coverter creates signals for the CRT. Voila: A picture. It's simple bitmap graphics. Thr faster...
  5. GeekDot

    UMAX SuperMac C series CacheDoubler

    ...and for those who have a C500/C600 (aka Apus 2000/3000) and never had a chance or money to buy a CacheDoubler: I wrote a lengthy post how to speed it up a bit 🔥 :cool: (Mainly to document it for myself, but maybe it's of help for some of you guys)
  6. GeekDot

    Building an internal grayscale card for the SE/30

    Yes, working on it (y)
  7. GeekDot

    Alternative Classic II FPU card

    Hi gang, While Marcin Dymczyks FPU card is cool, it uses a hard-to-get and quite expensive TE Connectivity AMP Connector which is ~13€/14$ at a minimum order of 50€ at Digikey. So my design available at https://github.com/axelmuhr/MacClassic2FPU uses a simple 90° Pin-Header connector (<1€)...
  8. GeekDot

    Source for MC68882FN40A Chips

    This might be a good time to steer you to my version of this adapter over at https://github.com/axelmuhr/MacClassic2FPU It uses a standard 20-pin, sub-$1 female connector instead of that very special, hard-to-get US$15 TE Connectivity AMP Connector. Also you can use 3 different types of...
  9. GeekDot

    Building an internal grayscale card for the SE/30

    No worries. I will publish it on my github as soon we're done - or at least have something we can call V1.x Hehe... and I wasn't aware that you weren't aware. That would have saved a lot of written bytes being wasted 😅 No offence - but if you have kids, you know how "are we there yet?" feels...
  10. GeekDot

    Building an internal grayscale card for the SE/30

    Well, I thought about that, too (obviously), but there are certain limitations: There are "the 3 commandments for a primaryInit": Thou shalt have no calls to ROM routines except for the Slot Manager Thy code length must be less than 16KB - but ideally it should be 2KB or less. Thy code...
  11. GeekDot

    Building an internal grayscale card for the SE/30

    It's not a fight -it's just the hardware department requiring convenience-features which will be abundant in the final product anyhow 😜 AU/X works fine indeed - minus the panning features because evil interrupt thingies are "VERBOTEN!" in serious OSes 😏 Also, we're 100% '24-bit clean' (did I...
  12. GeekDot

    Building an internal grayscale card for the SE/30

    Nope, the SE/30 video ROM is still in. But that's ok, as I politely remove all 4 Resources (0x01, 0x80, 0xA0, 0xFF) from slot $E with _sDeleteSRTRec. Well, that makes two including me ;-) But that GDevice thingy was a trace I once followed already and got somehow distracted... maybe by...
  13. GeekDot

    Building an internal grayscale card for the SE/30

    About the progress... [and a request for help] Theoretically the DeclROM for the BolleCard is done. It compiles fine in classic MPW (doing it in the correct vintage way ;)) and boots all the way through... What you see here is an external screen "emulating" the internal 9" at 512x342@8bit...
  14. GeekDot

    Building an internal grayscale card for the SE/30

    It's making progress. DeclROM assembles in MPW without errors... which does not necessarily mean it's working 😤 While I feel like a walking-talking index of "Designing Cards and Drivers..." (Chapter 8) and am close to be able to read sRessource entries directly from a binary dump, there's still...
  15. GeekDot

    Building an internal grayscale card for the SE/30

    The Micron uses an ASIC ("Maveric") which is in unobtanium. The Formac uses (vintage) standard parts. Easy decision IMHO...
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