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Messages - MPoupe
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121
« on: July 22, 2011, 06:35:58 am »
DJ_O: thank you for testing the player and posting the video:-)
122
« on: July 19, 2011, 05:29:27 am »
Wow, that's a huge calc! I don't have one that's as large as that one, unless PCs count 
And it has one advantage - it will NOT return error on division by error, but will start computing. Small disadvantage is, that such computing will never return ;-)
123
« on: July 19, 2011, 05:13:49 am »
What is your biggest calculator ?
I have Rheinmetal KEL IIc.
Input power: 100 W
Computing power: 10 operations per second (max)
Weight: ~17kg
124
« on: July 18, 2011, 11:06:37 am »
By the way, how many at Omni actually own a PRIZM to code for and test on? AFAIK there isn't a working emulator yet. 
I have written a simple simulator, so I can debug the application on windows platform. This helps me a lot, because there were almost no bug on the real hardware - I was able to catch them all on the simulator. I wrote about it here: http://ourl.ca/12030 , but nobody replied, so I though that nobody needs this.
125
« on: July 15, 2011, 05:18:01 am »
Maybe RLE could be used for compression? It's popular on older calculators since they only have 2/4 colors. Using RLE with 16-bit color won't really work, but maybe it's good enough for 4-bit?
Yes, I will probably try RLE as a next step.
126
« on: July 15, 2011, 04:20:01 am »
The frame rate looks great!  Is the video supposed to be in grayscale, or is this something that was added for compression?
Both:-) The video is in gray-scale (16 colors) to reduce video size.
127
« on: July 15, 2011, 04:06:20 am »
Is the rar file supposed to be able to sent to the calculator as a rar, or should only the raw file be sent?
Please, extract the rar and put the raw file in the calculator. I rared it to save bandwidth (and I would probably also touch the 7MB limit set on this server)
128
« on: July 15, 2011, 03:48:55 am »
Hello,
this is another version of the player. It uses 96x50 frames (4 bit colors), uncompressed. Video has 12.5 frames per second (the calculator was able to keep sync with computer, where the original video was playing)
The maximum speed (before I implemented timing) was 15.88 frames per seconds.
129
« on: July 14, 2011, 11:02:31 am »
No comment at all... :-(
130
« on: July 14, 2011, 09:01:06 am »
How large would the file size become if JPEG isn't used? Maybe we could try some other kind of compression... I don't know what one would fit, though. Screen has 384 x 216 x 2 B,I use 1/2 images (192*108*2) => 41472B. The jpeg compression makes them around 3.2 KB
131
« on: July 14, 2011, 03:45:50 am »
You shouldn't have to overclock the Prizm to get a high framerate. At 58 Mhz a framerate of over 30 hz should be possible. What method are you using to draw the video. A slowdown will occur if you use pixel on commands instead of using the VRAM as a buffer. Also if you did any compression that would contribute to the slow down.
Hi, of course I draw to VRAM and then call Bdisp_PutDisp_DD(). But the video is a sequence of jpeg images and jpeg decoding is very CPU expensive. Prizm doesn't have SD card, so I must use a compression :-(
132
« on: July 14, 2011, 03:37:14 am »
Are going to port Ich Will ?
Enjoy it. Be sure to store it in the calculator as demo.mjp
133
« on: July 13, 2011, 09:59:27 am »
Are going to port Ich Will ?
I can :-) Does somebody successfully oveclock Prizm ? I would like to try the player with higher CPU speed so I seek for some safe overclocking code ;-)
134
« on: July 13, 2011, 03:31:14 am »
There's a bit of empty space below the video. Would it be possible to move the video down, so that the busy indicator will appear above the video? It would help a bit, even though it doesn't give us a way to get rid of the indicator.
That would be very easy, but I would like to try to get rid of the busy box completely first :-)
135
« on: July 13, 2011, 03:19:39 am »
Yes, it is full color video, no sound yet. It is slow, video has about 5 fps, but running about 2 fps - this is not problem of the video size, but calculator speed. I need to overclock it (now it is running on original speed).
The busy box (or hourglass) is pretty annoying, but it is side effect of the Bfile_ReadFile_OS() function :-(
So there are few things to be solved yet :-)
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