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What is memory hole?

post #1 of 8
Thread Starter 
On my new X38 foxconn board there is a item in the BIOS called Memory Hole. Ever heard of this and is it like an FSB hole.
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post #2 of 8
sorry I can't help, never seen that one before. I actually looked around google for a while too but couldn't dig anything up. I'll try to keep lookin though, now I'm curious.
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post #3 of 8
What does it read when you select it with the cursor?

From what I've seen, it has to do with having >2 gigs of ram.
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post #4 of 8
Quote:
3.6.3.5. Memory Hole

If your BIOS offers something like “15–16 MB Memory Hole”, please disable that. Linux expects to find memory there if you have that much RAM.

We have a report of an Intel Endeavor motherboard on which there is an option called “LFB” or “Linear Frame Buffer”. This had two settings: “Disabled” and “1 Megabyte”. Set it to “1 Megabyte”. When disabled, the installation floppy was not read correctly, and the system eventually crashed. At this writing we don't understand what's going on with this particular device — it just worked with that setting and not without it.
Quote:
You can reserve this area of system memory for ISA adapter ROM. When
this area is reserved, it cannot be cached. The user information of peripherals
that need to use this area of system memory usually discusses their memory
requirements.
Quote:
In computer science, memory hole refers to a block of contiguous available memory. Information about free memory partitions or holes is maintained by the operating system. ...

Quote:
15M - 16M Memory Hole/Memory Hole

Options: Enable, Disable
This should always be disabled for modern systems. In the old days, ISA cards used the 15th megabyte for their own purposes. Modern ISA cards don't need this (EISA or PNP-ISA) and neither do PCI cards with one major exception -- Sound Blaster PCI128 and Sound Blaster Live cards like this to be enabled. It essentially removes 1MB of your RAM, so consider replacing the sound card instead. The SB16 emulation of those two cards is the business here -- don't install it and this shouldn't be a problem. Nevertheless, it's another suspect for crashes associated with the Sound Blaster. To replace SB16 emulation, try using VDMSound, which gives emulated sound for DOS programs in NT4, 2000, and XP, and doesn't need any special drivers.
You should leave this off. This seems to reserve RAM memory for some kind of use, in which it cannot be cached, like said above. I hope this helps.
    
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post #5 of 8
Wow, now that's a throwback to early 90s!
It reminded me of my first ever sound card I bout - a huge ISA card offering 'whooping' 8-bit MONO sound!
This is a legacy option used in the days of 386 and 486 PCs.
You gotta be in your 30's to remember that one lol.
Just keep it disabled.
post #6 of 8
Holy Memory Holes Bat Man...Thats right Robin, we used that in the Bat Cave Computer back then
    
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post #7 of 8
Thread Starter 
ninjinsamax3 was exactly right.

This is for my 38A foxconn digital life board
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post #8 of 8
heh all you had to do was select it
I think I have that on my sig rig board, but not sure...
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