MEM 80C00000h - Compaq Deskpro 386 system memory board register Size: BYTE 80C00000 R Diagnostics register (see #M0055) 80C00000 W RAM(Random Access Memory) See also DRAM, SRAM. relocation register (see #M0056) Bitfields for Compaq Deskpro 386 diagnostics register: Bit(s) Description (Table M0055) 7 =0 memory expansion board is installed 6 =0 second 1 MB of system memory board is installed 5-4 base memory 00 set to 640 KB 01 invalid 10 set to 512 KB 11 set to 256 KB 3 parity correct in byte 3 2 parity correct in byte 2 1 parity correct in byte 1 0 parity correct in byte 0 (in 32-bit double word) SeeAlso: #M0056 Bitfields for Compaq Deskpro 386 RAM(Random Access Memory) See also DRAM, SRAM. relocation register: Bit(s) Description (Table M0056) 7-2 reserved, always write 1's. 1 =0 Write-protect 128-Kbyte RAM(Random Access Memory) See also DRAM, SRAM. at FE0000. =1 Do not write-protect RAM(Random Access Memory) See also DRAM, SRAM. at FE0000. 0 =0 Relocate 128-Kbyte block at FE0000 to address 0E0000 =1 128-Kbyte RAM(Random Access Memory) See also DRAM, SRAM. is addressed only at FE0000. SeeAlso: #M0055