Epox 5ega+ memory remapping + MPU-401

[Ranmamez]

Hello.
I need to unlock the memory remapping feature for this motherboard, since it doesn't support/show all the ram when 4 GB is installed on it. The motherboard specs states that it supports 4Gb but at the POST the bios shows only 2.75 Gb available (when a pci-e graphic card with 256 Mb ram is installed, so to say: 3Gb -256Mb), and Windows too, it states "4Gb (2.75 available)".
Furthermore, it seems that this motherboard doesn't have the MPU-401 midi i/o devices, despite the fact that it has an AC'97 realtek audio codec, the ALC850: I have another Epox motherboard (the 8rda6+pro) that has the same audio codec and it has the mpu-401 even settable on the bios. Is it possible to enable it on this bios/mobo?
BTW this 5ega+ is a socket 775 with intel 915G chipset and ICH6 (or ICH6R) southbridge.
I'll attach the latest bios available, that's the one already installed on it.
Thanks in advance!

[Ranmamez]

Well, darn it, forget about remapping, I found that the chipset itself doesn't support it
I hope there's a way at least to enable the (maybe hidden?) MPU-401 midi i/o device...
Thanks in advance.
(But why nobody answers here? What kind of forum is this? :\)