IBM XT 5160 User Manual

8087 Coprocessor Instruction Set
The following is an instruction set summary for the 8087
coprocessor.
In the following, the bit pattern for escape is 11011.
MF =
Memory format
rIm
Operand
Address
00 -
32-bit
Real
000
(BX)
+
(S I)
+
DISP
01
- 32-bit Integer 001
(BX)
+ (D I) +
DISP
10 -
64-bit
Real 010
(BP)
+ (S I) +
DISP
11
- 64-bit
Integer all
(BP)
+
(D I) +
DISP
100
(S I)
+
DISP
101
(D I) +
DISP
110
(BP)
+
DISP*
100
(BX)
+
DISP
DISP follows 2nd byte of instruction (before data if required)
*except if mod=OO and r/m-110 then EA=disp-high: disp-low.
Data Transfer
FLD = Load
Integer/Real Memory to ST(O)
escape MF 1 mod 000 rIm
disp-low
Long
Integer
Memory to
ST(O)
escape 111 mod 101
rIm
disp-low
Temporary Real Memory to
ST(O)
escape all
mod 101
rIm
disp-low
BCD Memory to ST(O)
disp-high
disp-high
disp-high
escape 111
mod 100 rIm disp-low disp-high
ST(i) to ST(O)
escape 001
11000ST(i)
6-24 Instruction Set

IBM XT 5160 Specifications

General

Brand	IBM
Model	XT 5160
Category	Desktop
Language	English