IS200TBCIS2CCD燃機通用電氣,GE說明書在線閱讀
CPU/MPU寄存器MPU寄存器CR20保留供調試器使用。如果CR20要由用戶程序使用，必須在利用調試器資源（系統調用）。浮點支持MC88100的浮點特殊功能單元（SFU）187Bug支持微處理器芯片。對于MVME187BUG，命令MD、MM、RM和RS已擴展為允許寄存器和中浮點數據的顯示和修改記憶力浮點指令可以進行組裝和使用MD和MM命令的DI選項進行分解。
IS200TBCIS2CCD燃機通用電氣以單精度或雙精度格式輸入數據時必須遵守以下規則：符號字段是第一個字段，是二進制字段。2.指數字段是第二個字段，是十六進制領域尾數字段是最后一個字段，是十六進制字段。
4.符號字段、指數字段和至少第一位數字尾數字段必須存在（中的任何未指定數字尾數字段設置為零）。5強調符號和指數字段中的所有數字位置必須為目前此格式提供了輸入和顯示浮點十進制數。在內部，數字是組裝的轉換為壓縮十進制數，然后轉換為指定的數據類型。
以這種格式輸入數據需要以下字段：有關浮點SFU的更多信息，請參閱MC88100 RISC微處理器用戶手冊。可選符號位（+或-）。一個小數位數后跟一個小數點。最多17位小數（必須至少輸入一位）?？蛇x指數字段，包括：可選下劃線。指數字段標識符，字母“E”。可選指數符號（+，-）。從1到3位小數。
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.
