user manual

Additions to FLASH Commands
B-47
B
Scientific Notation
This format provides a convenient way to enter and display a
floating point decimal number. Internally, the number is assembled
into a packed decimal number then converted into a number of the
specified data type.
Entering data in this format requires the following fields:
❏ An optional sign bit (+ or -)
❏ One decimal digit followed by a decimal point
❏ Up to 17 decimal digits (at least one must be entered)
❏ An optional Exponent field that consists of:
Ð An optional underscore
Ð The Exponent field identifier, letter ÒEÓ
Ð An optional Exponent sign (+, -)
Ð From 1 to 3 decimal digits
For more information about the MC68060 floating point unit, refer
to the MC68060 Microprocessor User's Manual.
Additions to FLASH Commands
The 4MB of Flash memory on the MVME177 is unique in the way
that the lower half ÒshadowsÓ the PROM space in the memory map.
A jumper on the board allows the user to switch visibility between
the PROM sockets or 2MB (one half) of the Flash array.
Under software control, the lower half of Flash memory may be
switched into and out of the address space normally occupied by
the upper half of Flash memory, when the jumper (J8) is installed.