DIGITAL-LOGIC AG
PCCP5 Manual V2.3
41
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 !