BIOS Updates forum

Hi All -

I'm looking for the datasheet for the following chipset-

ALi M1531 IV/IV+ CPU-PCI Bridge
ALi M1533 IV ISA Controller
ALi M5229 EIDE Controller
ALi M5237 OpenHCI USB Controller

I have read that ALi does not post these, but I need information on the following BIOS items -

DRAM Speculative Read (Disabled, Enabled-Disabled)
DRAM Refresh (30uS, 15-30-60-120-256)
Primary Frame Buffer (2MB, 1-2-4-8-16)

The BIOS for the board in question also has choices for Read/Write WS (x222/x333), but no choice for DRAM R/W Leadoff Timing (6/7). Is this fixed for this chipset?

For DRAM Refresh, the board has SIMMS installed, but DIMMS were an option on the board (this one has no sockets installed). I know that DIMM Refresh is usually 15uS, but for SIMMS (and this board/BIOS combo), I'm not sure what to set.

The motherboard has an on-board, Pipelined Burst L2 Cache, and I don't know if I should be setting Speculative Read with the cache installed (on an i430VX, you do not if an L2 is installed so...).

What is the effect of increasing the Video Frame Buffer? The system has a cheap, Cirrus Logic 5446 PCI 1MB video card installed.

Thanks to all.

KachiWachi wrote: I'm looking for the datasheet for the following chipset-

There's something here:
http://www.rom.by/doki.htm

Can't decompress .RAR...can anyone reformat to .ZIP instead?

Kachiwachi, there are several freeware tools that'll decompress .RARs

KachiWachi, try this:
"ZIPGENIUS" from:
http://www.zipgenius.it/

I don't use RAR much (if ever). My PKZip unfortunately does not do RAR (maybe there is a converter download for it???).

Thanks to sulbert for decoding and posting them for me.

Now I can figure out more on the proper settings for this machine, as I noted earlier in this post.

Thanks again to all!!

http://www.winrar-rog.com/edownload/tools.html has a free unRAR util... and why not use RAR compression? WinRAR can do all sorts of (de)compression, including ZIP.

I never use ZIP anymore, it does not have any advantages over RAR (besides public acceptance maybe).