Getting the most from C128's VDC chip w/ idun-cartridge. Higher quality graphics/easier programming.

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  • เผยแพร่เมื่อ 21 พ.ย. 2024

ความคิดเห็น • 21

  • @vanhetgoor
    @vanhetgoor 9 หลายเดือนก่อน +1

    Back in the '80's we still had a long way to go. We all looked at the same primitive pictures and then we thought that milestones were reached. The bouncing ball, the pharaoh, the loin, in those day it was for computer enthusiasts almost impossible to draw something, the few pictures all were converted from a video digitiser on a big computer to the Amiga. There were great expectations but games never worked in het highest resolution, simply because the machines were not capable to move around large fragments of the screen.

    • @johnsmith1953x
      @johnsmith1953x 5 หลายเดือนก่อน

      That's the whole reason of using sprites and coppers.

  • @JohnMDiLiberto
    @JohnMDiLiberto 10 หลายเดือนก่อน +2

    Very interesting! I only had one friend (back in the day, of course) who upgraded to the 128, and I don't recall spending too much time investigating that gem with him.

    • @idunproject
      @idunproject  10 หลายเดือนก่อน +1

      Similar story here.

  • @BikeArea
    @BikeArea 10 หลายเดือนก่อน +1

    Thanks a lot for this profound explanation and presentation! ✌️

  • @megatech1966
    @megatech1966 10 หลายเดือนก่อน

    Very cool. Will try them out later.

  • @siener
    @siener 10 หลายเดือนก่อน +1

    Man, this really makes me wish that I had a 128. It's a pity they're so rare and so expensive.
    I'll keep on looking on EBay. Maybe one day...

    • @idunproject
      @idunproject  10 หลายเดือนก่อน

      Yes, it's a shame they are often pricey. I still see some good deals from the UK, occasionally.

  • @gertachimrenel595
    @gertachimrenel595 10 หลายเดือนก่อน +1

    You should add 720x350 and 720x700 monochrome, this is the resolution of the Hercules graphics card.
    There are some videos of Monkey Island in Hercules mode on TH-cam.

    • @idunproject
      @idunproject  10 หลายเดือนก่อน

      You're right. I bet those modes could be interesting with the right foreground/background colors and a nice 16-pixel high character set.

    • @gertachimrenel595
      @gertachimrenel595 10 หลายเดือนก่อน

      Also interesting would be quarter-PC resolutions: QuSVGA 400x300 and QuXGA 512x384. They are small, but based on a standard, and they can be in color.
      These modes are also interesting because the Amiga AGA chipset has these: Super72 LoRes and HighGfx LoRes. This would allow drawing images in DeluxePaint and then converting them to VDC format. And because the Amiga can read and write 1581 disks it is very easy to exchange files.

    • @gertachimrenel595
      @gertachimrenel595 10 หลายเดือนก่อน +1

      I'd recommend to give the modes names known from the PC and the Amiga. It is also better to sort them by resolution and color type. Here's my list to support most classic computers:
      Mode 1 320x200 - NTSC²
      Mode 2 320x240 - QVGA¹
      Mode 3 320x256 - PAL¹
      Mode 4 368x352 - D20¹
      Mode 5 400x300 - QSVGA² (or Super72)
      Mode 6 512x384 - QXGA² (or HighGfx)
      Mode 7 640x200 - MedRes¹
      Mode 8 640x400 - HiRes¹
      Mode 9 640x480 - Productivity¹
      Mode 10 640x480 - VGA²
      Mode 11 512x342 - MCC³
      Mode 12 640x400 - Mono³
      Mode 13 640x480 - MVGA³
      Mode 14 720x350 - Hercules³
      Mode 15 720x700 - Hercules2³
      Mode 16 800x600 - MSVGA³
      The modes marked with ¹ have a normal amount of color cells, the ones marked with ² a higher amount which are probably less used. ³ are monochrome modes.
      320x200 NTSC was the most flexible resolution on the original Amiga. The later PAL models got 320x256.
      320x240 is a quarter of VGA. The DOS version of Turrican II used this mode.
      D20 is the double resolution of the VIC-20. The VDC is well suitable for the VIC-20 color palette.
      QSVGA and QXGA would be named by PC resolutions, on the Amiga they are called Super72 and HighGfx. QXGA/HighGfx is also the double resolution of the ZX Spectrum.
      512x342 is the resolution of the Mac ClassiC - To avoid confusions with Apple I think MCC is a better name.
      640x400 Monochrome is the max resolution of the Atari ST and it would be the best resolution for GEOS 128.

  • @soviet9922
    @soviet9922 10 หลายเดือนก่อน

    amazing

  • @johnsmith1953x
    @johnsmith1953x 5 หลายเดือนก่อน

    The regular C128 only had 32k. You had to exand the internal VRAM to 64k to do this.
    The C128D came with a full 64k and had some other tricks.

    • @hayrettinyildiz8018
      @hayrettinyildiz8018 หลายเดือนก่อน +1

      Regular C128 (not C128D) has 16K Video RAM can be upgradable to 64K.

  • @victokra
    @victokra 10 หลายเดือนก่อน +2

    Would it have killed you to mention the "inspiration" for most of the modes you demonstrated? Namely my "VDC Mode Mania" and "VDC Spectrumania"-demos? You are even using most of the same pictures I originally converted for these modes. I appreciate the effort you took into building something larger out of this, but at least a mention would have been appropriate, I think.

    • @idunproject
      @idunproject  10 หลายเดือนก่อน +1

      But, I DO specifically mention the "VDC mode mania" demo @19:19

    • @victokra
      @victokra 10 หลายเดือนก่อน

      @@idunproject Oops, ok then. Did not find that on first skim-through, sorry. Then I guess it's just about VDC Spectrumania ;-)

    • @idunproject
      @idunproject  10 หลายเดือนก่อน

      @@victokra No problem. And for the record, thank you for showing the way with all your past demos!

  • @fradd182
    @fradd182 10 หลายเดือนก่อน +1

    So, no way that one could make something like Elite for VDC? You just cant draw a line fast enough?

    • @idunproject
      @idunproject  10 หลายเดือนก่อน +1

      I think it's possible. Just needs a lot of trickery. For example, rendering to local memory and generating character set tiles. Multiple character sets can be downloaded to the VDC, then used to draw pre-rendered images much quicker.