GE 235 System Manual page 43

The mnemonics for the following AAU instructions consist of the normal three alphabetics plus
the tag A in GAP coding sheet column 20. For example, LAQ A moves the contents of the QX
register to the AX register in the AAU while LAQ without the A tag moves the contents of Q to A
in the central processor.
Mnemonic Operand
Index Time
Oper. Code Address
Word Microsec.
-
Description
LQA
6 LOAD AX FROM QX. The contents of register QX
a r e moved into AX. QX i s unchanged.
6 MOVE AX TO QX.
The contents of register AX a r e
moved into QX. AX is cleared to zeros.
6 LOAD QX FROM AX. The contents of register AX
a r e moved into QX. AX i s unchanged.
6 EXCHANGE AX AND QX. The contents of registers
AX and QX a r e interchanged.
The memory address (Y) designated in an AAU instruction, a s i t appears in the I register a f t e r
address modification, must be greater than 001 5.
Mnemonic
Ope rand Index Time
Oper. Code Address Word Microsec. Description
FLD
FST
Y X 18 LOAD AAU. Contents of Y and Y + l a r e loaded into
register AX.
Y X 18 STORE AAU. Contents of register AX a r e stored
into Y and Y+1.
FAD
Y
X
24-36 NORMALIZED FLOATING POINT ADD. The floating
point number in Y and Y + l is added algebraically to
the floating point number in register AX. The result
i s in AX in normalized form.
24-30 UNNORMALIZED FLOATING POINT ADD. Same a s
normalized floating point add except the result i s
placed in registers AX and QX and may o r may not
be in normalized form.
24 DOUBLE WORD FIXED POINT ADD. The contents
of Y and Y+l a r e algebraically added to the contents
of register AX and the result is placed in AX a s a
38 bit fixed point number.