Image Map Image Map

Search:

Type: Posts; User: jhhoward

Search: Search took 0.02 seconds.

  1. Yeah can't be sure but this was just based off...

    Yeah can't be sure but this was just based off the attempted Linux driver which was developed by reverse engineering the DOS packet driver. There may well be other stuff needed in the EEPROM for it...
  2. Alternative link:...

    Alternative link:
    https://1drv.ms/u/s!AkWAuNgNhxwTga06k6VlLjrF-mA6lg?e=aA2i99
  3. I don't have a working adapter to pull the EEPROM...

    I don't have a working adapter to pull the EEPROM contents but based on the code from the attempted Linux driver I have created a small program to generate EEPROM values with a randomly assigned MAC...
  4. A quick video of the work in progress build...

    A quick video of the work in progress build running on my HP 100LX:


    https://www.youtube.com/watch?v=T0UFvSoetcI
  5. I haven't had much time to work on this but I've...

    I haven't had much time to work on this but I've made the git repository of the work in progress port public. There is a pre-built .exe available too for anyone wanting to try it out:...
  6. I know you can power these using a PS/2...

    I know you can power these using a PS/2 passthrough cable so perhaps this is for ensuring a clean 12V?

    Looking at the EEPROM chip docs it is possible to write new data to the chip easily enough...
  7. I took apart the adapter to have a look inside....

    I took apart the adapter to have a look inside. It is very easy to take apart - just slide the red rubber grip loop off the one side and then pry it open with a credit card. There are no screws, it...
  8. I've noticed a problem when using text mode on...

    I've noticed a problem when using text mode on the different palmtop devices. They treat text colour attributes differently, so although they both have different shades of grey in their display,...
  9. Yes technically the geometry could have any shape...

    Yes technically the geometry could have any shape and doesn't need to be limited to the grid. I'm doing it this way because I already have a bunch of systems already relying on a grid structure:...
  10. I took the code from the Linux driver and adapted...

    I took the code from the Linux driver and adapted it to dump the EEPROM contents and compiled to a DOS .EXE using OpenWatcom. Source and binary attached. With my adapter the contents of the EEPROM...
  11. Here is a bit of an explanation for how the demo...

    Here is a bit of an explanation for how the demo works.

    The level structure is generated into a 2D grid structure by recursively splitting the available area into small rooms. It is similar to the...
  12. I started porting the rest of the Catacombs of...

    I started porting the rest of the Catacombs of the Damned code to work in DOS. I've attached a work-in-progress demo for anyone interested. It procedurally generates the level on startup so takes a...
  13. The code I posted is from the attempt at a Linux...

    The code I posted is from the attempt at a Linux driver and isn't my work. It looks like it should be possible to makes some changes and compile with OpenWatcom to build a DOS program to do the...
  14. I was using Dosbox-X which has a CGA snow...

    I was using Dosbox-X which has a CGA snow emulation setting. It appears to be quite similar to PCem but there is still just the arbitrary 'cycles' setting for CPU speed so you get more or less snow...
  15. This was how I was originally going to approach...

    This was how I was originally going to approach it: composite mode for real CGA (with composite out) and 4 colour greys for the handhelds. The only difference being I was originally intending to...
  16. So after some research online I found this...

    So after some research online I found this attempt to write a Linux driver for the PE3. It was done by reverse engineering the DOS packet driver.

    Unfortunately it was never finished but it did get...
  17. @deathshadow You are correct, the roll effect...

    @deathshadow You are correct, the roll effect just shifts the columns up and down slightly to produce the effect. It definitely helps it feel more '3D'. I have been thinking about how I can do this...
  18. Well that's a bummer but not completely...

    Well that's a bummer but not completely unexpected. Even if it were easy enough to replace the EEPROM I expect it will be quite a challenge to work out what the contents should be without cloning a...
  19. I'm not completely attached to the old school...

    I'm not completely attached to the old school status bar. Catacombs of the Damned on Arduboy uses a simple bar to show health / mana. This is what is looks like on the Arduboy at 128x64 resolution:...
  20. Xircom Pocket Ethernet EEPROM unreadable error

    I am trying to connect my Sharp PC-3000 palmtop to my network using a Xircom PE3-10BC pocket ethernet adapter by connecting it to the computer's parallel port. I'm having a problem when I run the...
  21. Does CGA snow only happen when in 80 column mode?...

    Does CGA snow only happen when in 80 column mode? I thought it was a general text mode issue. The only problem with using vertical half characters is it would complicate the rendering functions as...
  22. I put together a simple tech demo to see what a...

    I put together a simple tech demo to see what a renderer using CGA text mode would look like. I get ~20FPS on my Sharp PC 3000 and HP 100LX although I will probably need to change the colours to work...
  23. Thanks for the feedback! @resman your raycaster...

    Thanks for the feedback! @resman your raycaster is really impressive!

    I wrote a test which did the most basic wall scaler (just solid colour) and the combine+blit to screen routine that I...
  24. Possible to do texture mapped pseudo 3D rendering on a 8088 / CGA machine?

    Over the years I've developed several pseudo 3D renderers similar to Wolfenstein 3D for various bits of hardware. Most recently Catacombs Of The Damned! for the Arduboy which runs on an Atmega chip...
Results 1 to 24 of 24