640x480 Video Mode Download

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In this video I walk through how to fix the Cannot find 640x480 error in Grand Thief Auto Vice City on windows 10 running a 1080p or similar display resoluti.
For me it was the hardest part to get all these information together because doing a 640x480 mod is a little bit of a faith ask. To give you a little more information and a better understanding what is happening when you do the different mods is a very useful knowledge when you want to do further steps, for example, the Takky Upgrade to the.

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Gta Iii Cannot Find 640x480 Video Mode

edited 2011-07-29 08:07 in Propeller 1

OV7670/OV7171 CMOS VGA (640x480) CameraChip™ Omni ision CIF CLKRC 0x11 0x01 30 fps CIF YUV mode COM7 0x12 0x00 COM3 0x0C 0x08 COM14 0x3E 0x11 SCALINGXSC 0x70 0x3A SCALINGYSC 0x71 0x35 SCALINGDCWCTR 0x72 0x11 SCALINGPCLKDIV 0x73 0xF1 SCALINGPCLK DELAY 0xA2 0x02 QCIF CLKRC 0x11 0x01 30 fps QCIF YUV mode COM7 0x12 0x00 COM3 0x0C 0x0C.

Is there a possibility to create a 640X480 pixel and 256 color vga signal with the p8x32a ?

Comments

edited 2011-07-25 09:52
edited 2011-07-25 10:21
Yes and no.
The standard VGA pinout is RrGgBbHV, so for 256 colors you'd need to move the sync signals to separate pins and modify VGA.spin to twiddle them via OUTA (and handle the slight timing differences).
The 256 colors would also be RRRGGGBB, while often '256 color' graphics use a 6 or 8 bit per color CLUT. Doing this on the Propeller would require a synchronized 3 cog display driver and a lot of effort.
But the bigger problem is RAM. The Propeller only has 32K of onboard RAM while a 640x480 8bpp bitmap requires 300K. Depending upon what is being displayed tiles are more memory efficient, but you are limited to 4 colors per tile.
edited 2011-07-25 11:10
Hi megaionstorm.
Look at Bill Henning's -- Morpheus and drivers to it -- But I don't think it is MIT licensed -- at least Hardware.
Is there a possibility to create a 640X480 pixel and 256 color vga signal with the p8x32a ?
edited 2011-07-26 07:16
edited 2011-07-26 10:20
edited 2011-07-26 12:00
Hi...
640x480x256 is not possible, as it needs ~300KB of external ram being read at 25MB/sec, requiring approx. 30ns static memory and >100MHz Propeller clock speed, and would leave almost zero time for drawing into the frame buffer, so even with the above restrictions it would only be useful for a static display.
I do have a working 320x240x256 'gaming' mode driver for Morpheus that uses 640x480 VGA timing (so as far as the monitor is concerned it is 640x480)
My web hosting service is having issues, so all graphics/downloads are off line at the moment.
Sapieha is correct, the Morpheus design is not open source.
Kye's suggestion is an excellent one, an FPGA + memory is the way to go for high resolution 256 colors per pixel graphics (or a cheap ITX motherboard)
edited 2011-07-26 19:24
I do have a working 320x240x256 'gaming' mode driver

This would do the job too.
To bad, no way to download it !
edited 2011-07-26 20:16
megaionstorm,
What are you trying to make? The more information we have on what you want to do, the better the odds that we can help you.
Bill
edited 2011-07-27 06:13
What i try to do is the following:
The idea for my base concept is to create a circuit with 3 p8x32a.
One for the main work, one for soundfx and one for graphic vga output.
It should have a adapter for 2 nes gamepads and for microSD.
Speech synthesis through a speakjet ic.
I work with a breadboard p8x32a. 5MHz and pll16x.
I want add for the stereo sound output 2 tda amplifier, 10 W each.
Add the possibility for vga with 320X240 pixel and 256 colors.
As a base concept for my future ideas !
edited 2011-07-27 06:14
One of my ideas is that one p8x32a create the picture data and store in an ram or eeprom chip.
A second
edited 2011-07-29 06:34
edited 2011-07-29 06:51
I'm pretty sure I can do 320x240 VGA with 256 colors using my FlashPoint Rampage module.
I'd probably just use 64 colors though, in order to use the standard hardware.
(hopefully, I'll have time to try that out one day...)
If you used two of them on pins, P0..P7, similar to the way jazzed' modules are wired,
then I'd bet you could do 640x480.
edited 2011-07-29 06:53
Get a hive retrocomputer... it has more or less what you want http://www.hive-project.de... most info in German
edited 2011-07-29 08:07
I think the hive computer shows the right way to realize the own idea ... As a tutorial, how to do it !

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