IBM 5150 - Page 225

FSTP ; STORE AND POP
ST(O) to IntegerlReal Memory
Escape MF
I mod 0 1 1 rIm
disp-Iow disp-high
ST(O) to Long Integer Memory
Escape 1 1 I mod 1
1 rIm
disp-Iow disp-high
ST(O) to Temporary Real Memory
Escape 0 1 1
I mod 1 1 1 rIm
disp-Iow
disp-high
ST(O) to BCD Memory
Escape 1 1 1
I mod 1 1 0 rIm
disp-Iow
disp-high
ST(O) to STm
Escape 1 0 1 1 0 1 1
STO)
FXCH =Exchange ST(i) and ST(O)
Escape 0 0 1 1 1 0 0 1 STm
6-18 Instruction Set