IBM Personal System/2 60 User Manual

Low and High Base Memory Bytes (Hex 015 and 016): These bytes
define the amount of memory below the 640KB address space.
The value from these bytes represents the number of 1KB blocks of
base memory. For example, hex 0280 is equal to 640KB. The low
byte is hex 15; the high byte is hex 16.
Low and High Expansion Memory Bytes (Hex 017 and 018): These
bytes define the amount of memory above the 1MB address space.
The hexadecimal values in these bytes represent the number of 1KB
blocks of expansion memory. For example, hex 0800 is equal to
2048KB. The low byte is hex 17; the high byte is hex 18.
Reserved Bytes (Hex 019 through 031): These bytes are reserved.
Configuration CRC Bytes (Hex 032 and 033): These bytes contain the
cyclic-redundancy-check data for bytes hex 010 through hex 031 of the
64-byte CMOS RAM. The low byte is hex 33; the high byte is hex 32.
| Reserved Byte (Hex 034): This byte is reserved.
| Low and High Useable Memory Bytes (Hex 035 and 036): These
| bytes define the total amount of useable memory above the 1MB
| address space.
| The hexadecimal values in these bytes represent the number of 1KB
| blocks of useable memory. For example, hex 0800 is equal to
| 2048KB. The low byte is hex 35; the high byte is hex 36.
Date Century Byte (Hex 037): Bits 7 through 0 of this byte contain the
BCD value for the century. Refer to the /BM Personal System/2 and
Personal Computer BIOS Interface Technical Reference for
information about reading and setting this byte.
Reserved Bytes (Hex 038 through 03F): These bytes are reserved.
Model 60 System Board — October 1990 3-19

IBM Personal System/2 60 Specifications

General

Brand	IBM
Model	Personal System/2 60
Category	Desktop
Language	English