Additions to FLASH Commands

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:

ÐAn optional underscore

ÐThe Exponent field identifier, letter ÒEÓ

ÐAn optional Exponent sign (+, -)

ÐFrom 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.

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Motorola MVME177 manual Additions to Flash Commands, Scientific Notation