IS200TBCIS2CCD燃机通用电气,GE说明书在线阅读
CPU/MPU寄存器MPU寄存器CR20保留供调试器使用。如果CR20要由用户程序使用，必须在利用调试器资源（系统调用）。浮点支持MC88100的浮点特殊功能单元（SFU）187Bug支持微处理器芯片。对于MVME187BUG，命令MD、MM、RM和RS已扩展为允许寄存器和中浮点数据的显示和修改记忆力浮点指令可以进行组装和使用MD和MM命令的DI选项进行分解。
IS200TBCIS2CCD燃机通用电气以单精度或双精度格式输入数据时必须遵守以下规则：符号字段是第一个字段，是二进制字段。2.指数字段是第二个字段，是十六进制领域尾数字段是最后一个字段，是十六进制字段。
4.符号字段、指数字段和至少第一位数字尾数字段必须存在（中的任何未指定数字尾数字段设置为零）。5强调符号和指数字段中的所有数字位置必须为目前此格式提供了输入和显示浮点十进制数。在内部，数字是组装的转换为压缩十进制数，然后转换为指定的数据类型。
以这种格式输入数据需要以下字段：有关浮点SFU的更多信息，请参阅MC88100 RISC微处理器用户手册。可选符号位（+或-）。一个小数位数后跟一个小数点。最多17位小数（必须至少输入一位）。可选指数字段，包括：可选下划线。指数字段标识符，字母“E”。可选指数符号（+，-）。从1到3位小数。
CPU/MPU Registers
MPU register CR20 is reserved for usage by the debugger. If CR20
is to be used by the user program, it must be restored prior to
utilizing debugger resources (system calls).
Floating Point Support
The floating point Special Function Unit (SFU) of the MC88100
microprocessor chip is supported in 187Bug. For MVME187BUG,
the commands MD, MM, RM, and RS have been extended to allow
display and modification of floating point data in registers and in
memory. Floating point instructions can be assembled and
disassembled with the DI option of the MD and MM commands. When entering data in single or double precision 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. 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 and then converted into a number of
the specified data type.
Entering data in this format requires the following fields:
For more information about the floating point SFU, refer to the
MC88100 RISC Microprocessor User's Manual.
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:
An optional underscore.
The Exponent field identifier, letter “E”.
An optional Exponent sign (+, -).
From 1 to 3 decimal digits.
