Advantech PCA-6774 user manual Table C.2 1st MB memory map

Table C.1: System I/O ports

Addr. range (Hex)	Device
778-77A	Parallel Port (ECP Extensions) (Port 378+400)

MPU-401 select from 300 ~ 330H (2 bytes)

C.2 1st MB memory map

Table C.2: 1st MB memory map

Addr. range (Hex)	Device
F0000h - FFFFFh	System ROM
*CC000h - EFFFFh	Unused (reserved for Ethernet ROM)
C0000h - CBFFFh	Expansion ROM (for VGA BIOS)
B8000h - BFFFFh	CGA/EGA/VGA text
B0000h - B7FFFh	Unused
A0000h - AFFFFh	EGA/VGA graphics
00000h - 9FFFFh	Base memory

*If Ethernet boot ROM is disabled (Ethernet ROM occupies about 16 KB)

*E0000 - EFFFF is reserved for BIOS POST

113 Appx.C