DIGITAL-LOGIC AG PCCP5 Manual V2.3
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4.8 Memory
4.8.1 Onboard DRAM Memory
Speed: 60ns
Size: 2 x 72pins SIMM
Bits: 36 Bit
Capacity: 8 MBytes, 16 MBytes, 32 MBytes, 64 MBytes
Bank: allways two banks must be equipped
Size combinations: Bank1 Number of
Big SIMMs
Total Interleaved
1MBx36 2 8 MBytes
2MBx36 2 16 MBytes
4MBx36 2 32 MBytes
8MBx36 2 64 MBytes
4.8.2 System Memory Map
The CPU used as a central processing unit on the MICROSPACE PC has a memory address space which is
defined by 32 address bits. Therefore, it can address 1GByte of memory. The memory address MAP is as
follows:
CPU P5
Address Size Function / Comments
000000 - 09FFFFh 640 KBytes Onboard DRAM for DOS applications
0A0000 - 0BFFFFh 128 KBytes CGA, EGA, LCD Video RAM 128kB
0C0000 - 0CFFFFh 64 KBytes Reserved for expansion bus ROMs:
C000 - CC00 for VGA BIOS
0D0000 - 0DFFFFh 64 KBytes Free or DiskOnChip DOC2000 Module from MSystems
0E0000 - 0EFFFFh 64 KBytes PCI-System BIOS incl. SCSI-BIOS
0F0000 - 0FFFFFh 64 KBytes PCI-System BIOS incl. SCSI-BIOS
100000 - 1FFFFFh 1 MByte DRAM for extended onboard memory
200000 - FFFFFFh 14 MBytes DRAM for extended onboard memory
Attention: Only the D-Segment is free for the user, to use EMM386 or HIMEM programs
If the DOC2000 module is used, the D-Segment is also used, and no EMM386
may be used. For the HIMEM use the EMM386 with the option NOEMS !
Urgent: The AMI POWER BIOS for the P5 has a size of 128k and this value is definitiv,
that means may be not decreased !
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