Video Memory question

[Aceman.au]

Hello I got this question in a college course today about monitor resolutions and colour combinations.

Here it is.

Which of the following resolution and color combo's are possible for a video adaptor with 1024 kilobytes of video memory?

1. 640x580, 16m colours
2. 1024x768 256 colours
3. 800x600 64k colours
4. 1024 x 768 64k colours

How is this calculated? Tried google, found nothing solid.

 

[sy5tem]

Hello I got this question in a college course today about monitor resolutions and colour combinations.

Here it is.

Which of the following resolution and color combo's are possible for a video adaptor with 1024 kilobytes of video memory?

1. 640x580, 16m colours
2. 1024x768 256 colours
3. 800x600 64k colours
4. 1024 x 768 64k colours

How is this calculated? Tried google, found nothing solid.

you need to google harder !
lol

http://www.philipstorr.id.au/pcbook/book3/videosys.htm

 

[Aceman.au]

you need to google harder !
lol

http://www.philipstorr.id.au/pcbook/book3/videosys.htm

Oh the sexual innuendo. Thanks man

 

[BraveSoul]

1024 kilobytes of video memory

thats 1megabyte ,,jeeesh,,how much can u fit in that,,,,,
u got a book?read the chapter,,this google thing is making everybody lazy
im thinking #2. 1024x768 256 colours,,,sounds like its the smallest,, maybe it should fit in 1mb
_______________________

antec1200 filter mod | 4x4 Best off road games

 

[Aceman.au]

Unfortunately no books. We had to find the information ourselves.

 

[sy5tem]

hehe get a calculator up this page was also driving me sick... must be some other web paeg with better explanation

with google its really hard to find stuff these day... well i can find Viagra by typing anything LOL but for real search you have to start at the 10th page LOL

 

[yogurt_21]

so according to to that site 1,2,and 3 are possible but 4 isn't, you'd need 1.5megs of vram for that

so 8 bits per byte

16 colors requires 4 bits (.5 bytes)
256 requires 8 bits (1 byte)
64k requires 16 bits (2 bytes)
16.7 million requires 24 bits (3 bytes)

multiply the resolution out so 800x600 = 480,000 pixels then multiply that by the bytes required per pixel for the amount of color desired.

interesting as this means my ati rage 16mb is capable of displaying 2560x1600 at 16.7 million colors (12.28 megs of vram required)