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wiz21 information 15 glöps

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• demo Apple II Stevie by Samar Productions
• Super cool ! I like the 3D pyramid rotating while doing some rasterbar stuff in the first screen :-) nice sync code !
• isokadded on the 2021-06-02 14:35:37
• 256b Apple II Terra Nova by French Touch
• Now I have to best you :-) Nice job grouik, on our beloved, frustrating platform :-) See you on your next performance !
• rulezadded on the 2021-04-06 21:57:57
• demo Apple II LowTech by Imphobia
• This is my submission for Revision 2021. For those interested, there's a long technical description of how I made it on GitHub ('cos it's a bit trickier than it seems).
• isokadded on the 2021-04-06 20:27:45
• demo Apple II Latecomer by Fenarinarsa [web]
• Hey, nice job! After my Bad Apple ][+ demo, I'll have to surpass myself to do better than you :-) thx for the competition :-)
• rulezadded on the 2019-04-28 21:50:59
• fastdemo Apple II Bad Apple on Apple ][+
• Very strange. I tested it again and it works flawlessy under AppleWin 1.27.
  
  Coul yout tell at which moment it stops/crashes ?
  
  thx,
  
  Wiz
• isokadded on the 2019-04-20 19:38:15
• fastdemo Apple II Bad Apple on Apple ][+
• Works on https://www.scullinsteel.com/apple2/ too :-)
• isokadded on the 2019-04-20 10:10:22
• fastdemo Apple II Bad Apple on Apple ][+
• Did you swap the disk after loading the first disk. There are instruction on the screen asking you to do that (but the program doesn't check if it's done :-())
  
  The demo is known to run on AppleWin, Mame and Virtual ][. It also works on a very real Apple 2+ (tested !)
• isokadded on the 2019-04-20 09:58:07
• fastdemo Apple II Bad Apple on Apple ][+
• For those who wonder, it's quite tough to do :-)
  
  Because: the Apple has no character disply (like C64), because it has no interrupt, because it has no vblank sync, because it has no timer... And don't get me started on the speaker...
• isokadded on the 2019-04-19 16:30:41
• fastdemo Apple II Bad Apple on Apple ][+
• This is the Bad Apple demo on Apple 2+
  By Wiz/Imphobia
  
  GitHub repository
  
  YouTube if you don't want to install the DSK's
• isokadded on the 2019-04-19 16:26:14
• diskmag MS-Dos Imphobia #6 by Imphobia
• Wiz/Imphobia typing...
  
  The graphics mode was indeed 640x480. But I used a trick to actually split that screen in three parts. On each frame, I set up a timer IRQ right after the top logo and another one right after the main text. This way I was able to reset the palette 3 times on the screen (one on top and 2 at the IRQ). So basically, I was displayong 48 colours on a standard 640x480x16. The whole problem was to have a very accurate timing so that the IRQ were triggered at the right position. I achieved that by timing the screen when starting the diskmag. This way I was independent of the speed of the CPU and this guaranteed almost 0-glitch display. A difficulty was that most of MOD players were using the timer IRQ as well, conflicting with my display. SO i had to find a solution, but I don't remember it, it was basically 13 years ago... gettin' old... Although PL didn't use all the colors (for the sake of "clean&cool" style), one can see those in actions when the text area fades in & out. It took me 2-3 weeks to get the whole thing right and stable (stability was our prime concern)
  
  Problem with this way of handling video is that it's pretty difficult for emulator to cope with it... Sorry about that...
  
  The scrolling part was also using a VGA trick, that is, reset the frame buffer adress. This way I could move the text-area without using much CPU power.
  
  Another detail was the size of the mag. Basically we had to crunch everything so that it fitted on one floppy disk. Unfortunately, I was quite isolated at the time and finding an LZW compressor/decompressor was very hard for me, as well as learning the VGA tricks.
• isokadded on the 2009-06-28 16:17:40