user manual

Floating Point Support
B-45
B
When entering data in:
❏ Single precision
❏ Double precision
❏ Extended precision
❏ Packed decimal format
the following rules must be observed:
1. The sign field is the first field and is a binary field.
2. The exponent field is the second field and is a hexadecimal
field.
3. The mantissa field is the last field and is a hexadecimal field.
4. The sign field, the exponent field, and at least the first digit of
the mantissa field must be present (any unspecified digits in
the mantissa field are set to zero).
5. Each field must be separated from adjacent fields by an
underscore.
6. All the digit positions in the sign and exponent fields must be
present.
Single Precision Real
This format would appear in memory as:
A single precision number requires 4 bytes in memory.
1-bit sign Þeld (1 binary digit)
8-bit biased exponent Þeld (2 hex digits. Bias = $7F)
23-bit fraction Þeld (6 hex digits)