next pics

and the last pics

gonzo wrote on 2025-03-12, 16:20:

Also, I have a question- what software are you using to check what you wrote above "In the 256MB case all 256MB are being cached in "Write Back" mode, "Write Allocation" gets enabled by BIOS.
If there´s 512MB RAM present, 512Mb are being cached, but BIOS switches to "Write Through" mode to avoid half of the RAM being uncached. Write Allocation is disabled in this case."

All this is due to chipset / BIOS limitations.
To verify these details you can use "CTCM 1.7" to check the cacheable areas and WB / WT mode.
Use "setk6" to check if Write Allocation is enabled and the RAM area that´s covered.

The remark for no 2MB of cache has been removed from the page. It was wrongly copied when cloning this page based on another board:
https://theretroweb.com/motherboards/s/tmc-my … megastar-ti5vga