Specifications

CP302 Functional Description and Configuration
ID 21112, Rev. 05 Page 2 - 33® PEP Modular Computers GmbH
VGA Interface
The VGA signals are available on J2 when the board is ordered for Rear I/O configura-
tion. In this configuration both interfaces are active. The 75 ohm termination resistor for
the red, green and blue video signals are equipped on the CP302.
2.7.8 Reserved Jumpers
Jumper J5 is reserved for future configurations
2.8 Memory Map
The CP302 board uses the standard AT ISA memory map.
The following table displays the memory map for the first megabyte:
Table 2-21: VGA Interface Configuration
Configuration Location
75 Ohm for red R51
75 Ohm for green R40
75 Ohm for blue R32
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Note:
Both VGA ports are electrically identical and not separated. Do
not connect devices at both connectors (front I/O and Rear I/O)
at the same time.
Table 2-22: Memory Map for the 1st Megabyte
Memory Range (Hex.) Size Function
0xE0000-0xFFFFF 128k
BIOS implemented in Flash EPROM
Reset vector FFFF0h
0xD0000-0xDFFFF 8k/64k
Flash disk: min. 8 kB, max. 64 kB
0xC8000-0xCFFFF 32k
Free
0xC0000-0xC7FFF 32k
BIOS of the VGA card
0xA0000-0xBFFFF 128k
Normally used as video RAM as follows:
CGA video:0xB8000-0xBFFFF
Monochrome video:0xB0000-0xB7FFF
EGA/VGA video:0xA0000-0xAFFFF
0x00000-0x9FFFF 640k
DOS reserved memory space
0x00000-0x00501 --
BIOS data area and interrupt space
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