Using the 162Bug Debugger

Single Precision Real

This format would appear in memory as:

1-bit sign field

(1 binary digit)

8-bit biased exponent field

(2 hex digits. Bias = $7F)

23-bit fraction field

(6 hex digits)

4

A single precision number takes 4 bytes in memory.

Double Precision Real

This format would appear in memory as:

1-bit sign field

(1 binary digit)

11-bit biased exponent field

(3 hex digits. Bias = $3FF)

52-bit fraction field

(13 hex digits)

A double precision number takes 8 bytes in memory.

Note

The single and double precision formats have an implied integer bit (always 1).

Extended Precision Real

This format would appear in memory as:

1-bit sign field

(1 binary digit)

15-bit biased exponent field

(4 hex digits. Bias = $3FFF)

64-bit mantissa field

(16 hex digits)

An extended precision number takes 10 bytes in memory.

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MVME162 Embedded Controller Installation Guide

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Motorola MVME162 manual Single Precision Real, Double Precision Real, Extended Precision Real