Xycom XVME-678 Manual page 48

Chapter 3 - BIOS Setup Program
3.3.1.1 Date (01/0111988 format)
The date entry sets the real time clock for the month, day, and year. The left and right arrow keys and
the enter key may be used to move from one field to the next. The numeric keys, 0-9, are used to change
the field values. It is not necessary to type zeros in front of numbers.
3.3.1.2 Time (00:00:00 format)
The time entry sets the real time clock for hours, minutes, and seconds. During the power-up sequence,
the time is read from the real time clock and saved in the BIOS system time.
The hour is calculated according to a 24-hour military clock, i.e., 00:00:00 through 23:59:59. The left
and right arrow keys and the enter key may be used to move from one field to the next. The numeric
keys, 0-9, are used to change the field values. It is not necessary to enter the seconds or type zeros in
front of numbers.
3.3.1.3 Setup RAM Configuration
The RAM on the XVME-678/688 can be partitioned or allocated between system memory, extended
memory, shadow memory, and EMS memory. The F9 key is used to automatically resize memory and
select default memory values. The default memory configuration is 640 Kbytes system memory, 96 Kbytes
shadow memory, 288 Kbytes EMS memory, and 3072 Kbytes or 15360 Kbytes of extended memory,
depending on the XVME-678/688 version.
3.3.1.4 System Memory
This option should always indicate the size of conventional system memory as 640 Kbytes.
3.3.1.5 Extended Memory
This option sets the amount of extended memory in Kbyte increments. The maximum amount of extended
memory is 31 Mbytes (31744 Kbytes).
3.3.1.6 Shadow Memory
This field displays the amount of shadow memory in use. The contents of this field are controlled by
BIOS shadow selection. Shadow memory is used to copy the system and/or video BIOS into RAM to
improve performance. The XVME-678/688 allocates for Shadow RAM in Kbytes, and this number will
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