Re: Computer upgrade

Here is the EMC memory infomation for using motherboards
with integrated video. Check how much video ram you have
reserved in BIOS and then use the selected shared memory
address line below in you XXX.ini file.

edit Your emc.ini ( or whatever xxx.ini file you are using) and
use ONE of the following lines depending on your setup

SHMEM_BASE_ADDRESS=0x0F00000 ; 16MB no shared video memory
SHMEM_BASE_ADDRESS=0x1F00000 ; 32MB no shared video memory
SHMEM_BASE_ADDRESS=0x3F00000 ; 64MB no shared video memory

; share video memory settings
SHMEM_BASE_ADDRESS=0x0D00000 ; 16MB 2MB shared video memory
SHMEM_BASE_ADDRESS=0x0B00000 ; 16MB 4MB shared video memory
SHMEM_BASE_ADDRESS=0x0700000 ; 16MB 8MB shared video memory

SHMEM_BASE_ADDRESS=0x1D00000 ; 32MB 2MB shared video memory
SHMEM_BASE_ADDRESS=0x1B00000 ; 32MB 4MB shared video memory
SHMEM_BASE_ADDRESS=0x1700000 ; 32MB 8MB shared video memory

SHMEM_BASE_ADDRESS=0x3D00000 ; 64MB 2MB shared video memory
SHMEM_BASE_ADDRESS=0x3B00000 ; 64MB 4MB shared video memory
SHMEM_BASE_ADDRESS=0x3700000 ; 64MB 8MB shared video memory


hope this helps!!!

dave

>darrel
>
>Your new motherboard is stealing MAin ram for onboard video. When RTlinux loads

>it is trying to reserve the top 1MB, But this has been used by the BIOS for

>video screen memory. So there is
>a conflict and the system crashes.
>
>This why these boards are cheaper than the others.I have
>several and they are great. You just need to look up in the bios ( or the

boot

>screen) and determine how many MB they are
>reserving in the BIOS for video. it is either 2MB 4MB or 8MB.
>For EMC at normal resolutions and color depths (800x600 32768/16 bit color)

>2MB is fine.
>
>I will assume that you are using 32MB of RAM!! If you use 64MB
>follow the same instructions but replace the numbers for 64MB, or email me!

>
>
>Total PHYSICAL ram=32MB
>Subtract Video ram ( reserved by bios) = 2MB <- BIOS Setting!!!
>Total ram LEFT FOR LINUX = 30MB
>Subtract rtlinux Reserved shared memory ram = 1MB
>Total ram for RTlinux=29MB
>
>
>
>So here is what you need to do.
>1) determine the amount of ram the bios is reserving for video. OR set it to

>2MB so that you get the most amount of ram for the
>CPU. You need to go into the BIOS screens (advanced settings) to set the video

>ram size to 2MB.
>
>2)The edit your lilo.conf file ( while booted in non-rt linux)
>to read append="mem=29MB" see my simple math above. This will
>start rtlinux with 1MB reserved as a shared memory buffer.
>
>3)rerun lilo
>
>4) reboot. and rtlinux should run. Test you Xwindows to make
>sure the new 2MB video ram allows the screen resolution desired.
>
>5) You must now configure EMC to know the address of the physcal
>ram for the 1MB buffer. ( I forget how to do this right now)
>
>Check that this gets you booted, I'll find the EMC config
>file and post the memory addresses. IT just ends up being
>2MB LESS ( in HEX!!) than the addresses that EMC has encoded
>in there ( see Tims scritped install).
>
>How much Physical ram is installed?
>
>good luck
>dave
>
>