OS/2, eCS & ArcaOS - Technical > Hardware

Hardware Compatibility Wishlist for 2022

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Andreas Schnellbacher:

--- Quote from: Dave Yeo on January 23, 2022, 01:47:04 am ---One thing is to set the size of the swap file as fairly large (1GB?) as growing it can cause problems.

--- End quote ---
Thanks, I have set it now to 1 GB and will report:

--- Code: ---SWAPPATH=C:\OS2\SYSTEM 2048 1048576
--- End code ---

When that works better, it's time to use the RAM disk.

Doug Clark:
Are you guys saying that AOS on newer systems with more than 4 GB of ram installed cannot utilitize all 4 GB of RAM for the system?

 

 

Dave Yeo:
For some systems, yes. It varies but some systems have holes (used by the hardware I believe) in the memory address map creating the problem that Andreas has, only a couple of GB's accessible in the lower 4GB's of address space.

OS4User:

--- Quote from: Doug Clark on January 24, 2022, 03:22:17 am ---Are you guys saying that AOS on newer systems with more than 4 GB of ram installed cannot utilitize all 4 GB of RAM for the system?

--- End quote ---

OS/2 only works with 32-bit physical addresses (kernel and drivers). So it is possible to address RAM (and other devices) that the motherboard maps below 4Gb. Some recent developments allow utilize of RAM above 4 GB, but so far only for ramdrive (AOS uses PAE, OS/4 uses PSE36).

Unfortunately, newer motherboards map the bulk of RAM above 4GB and below 4GB by only 1GB or so.

Andreas Schnellbacher:

--- Quote from: OS4User on January 24, 2022, 07:14:58 am ---Unfortunately, newer motherboards map the bulk of RAM above 4GB and below 4GB by only 1GB or so.

--- End quote ---
Here large parts of the RAM are below 4 GB, but Dmitry's loader recognizes just the largest contiguous block.

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