IBM 5150 Technical Reference

Comparison
FCOM = Compare
Integer/Real Memory
to ST(O)
Escape
MF 0
mod
0
1
0
rim
disp-Iow
disp-high
~
ST(i)
to ST(O)
Escape
0
0 0
1
1 0
1
o ST(i)
FCOMP == Compare and Pop
Integer/Real Memory
to ST(O)
I. Escape MF 0
mod 0 1 1 rim
disp-Iow
disp-high
ST(i)
to ST(O)
Escape 0 0 0 1 1 0 1 1 ST(i)
FCOMPP = Compare ST(1) to ST(O) and Pop twice
Escape 1 1 0 1 1 1 0 1 1 0 0 1
FTST == Test ST(O)
Escape 0 0 1 1 1
1001001
FXAM == Examine ST(O)
Escape 0 0 1 1 1
00101
Arithmetic
FADD == Addition
Integer/Real Memory
with ST(O)
Escape MF 0
mod 0 0 0
rim
disp-Iow
disp-high
ST(i)
to ST(O)
Escape d P 0 1 1 0 0 0 ST(i)
FSUB == Subtraction
Integer/Real Memory
with ST(O)
Escape MF 0
mod 1 0 R
rim
disp-Iow disp-high
ST(i)
to ST(O)
Escape d P 0 1 1 1 0 R rim
Instruction Set 6-19

IBM 5150 Specifications

General

Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Manufacturer	IBM
Model	5150
Release Year	1981
Storage	5.25-inch floppy drives
Graphics	MDA or CGA
Operating System	IBM PC DOS
Ports	Cassette, keyboard
Expansion Slots	5