Indie gamedev for IfThen Software. I usually handle technical tasks, but I also pitch in with PR, marketing, and community management.
Because I'm getting into the section on memory (and some parts of yesterday's example made me curious, particularly the RAS-to-CAS delay) I have decided to research RAM again. I did quite a bit of research in this area about a month ago, so a lot of this is review and should go by relatively quickly.
The array is split up into rows and columns. A row is equivalent to a word line, so that's easy enough. A column is made up of multiple contiguous bit lines, either 4, 8, or 16 depending on the architecture of the chip. The number of bit lines which make up a column is the word width of the chip, or just simply the "width". This is usually written with an "x" followed by the width: x4, x8, and x16.
The number of rows depends on the generation of DDR and the "density" of the chip. The density is the number of bits the chip has total across all banks. The number of columns depends on the density and width of the chip. The exact row and column counts for the possible densities and widths are specified by the DDR standard for the generation in question, although my experience is that you have to perform some calculations to find them. Here is a table I put together of the row and column counts for the first generation of DDR:
Reposted from Invisiblegdev.blogspot.com
No blogs were found matching the criteria specified. We suggest you try the blog list with no filter applied, to browse all available. Join now to share your own content, we welcome creators and consumers alike and look forward to your comments.
Indie games are changing the world, one giant pixel at a time. With Indie DB we aim to support independent developers and their games, by providing them...
IfThen Software is an independent game development company with a focus on multiplayer games.
No groups were found matching the criteria specified. We suggest you try the group list with no filter applied, to browse all available. Start a group and help us achieve our mission of showcasing the best content from all developers. Join now to share your own content, we welcome creators and consumers alike and look forward to your comments.