Technical data

Conversion operations
Operation Function
CFW
CSW
CSD
DEF
DUF
DED
DUD
FDG
GFD
Form the 1’s complement of ACCU-1-L (16 bits)
Form the 2’s complement of ACCU-1-L (16 bits)
Form the 2’s complement of ACCU 1 (32 bits)
Convert a fixed point number (16 bits) from BCD to binary
Convert a fixed point number (16 bits) from binary to BCD
Convert a double word (32 bits) from BCD to binary
Convert a double word (32 bits) from binary to BCD
Convert a fixed point number (32 bits) to a floating point number (32 bits)
Convert a floating point number to a fixed point number (32 bits)
DEF The value in ACCU-1-L (bits 0 to 15) is interpreted as a BCD
number. After the conversion, ACCU-1-L contains a 16-bit fixed
point number.
DUF The value in ACCU-1-L (bits 0 to 15) is interpreted as a 16-bit fixed
point number. After the conversion, ACCU-1-L contains a BCD number.
15 14 0
S2
14
. . . . . . . . . . . . . . . 2
0
DUF ↓ DEF ↑
15
0
S S S S 10
2
10
1
10
0
S (sign): 0 = positive
1 = negative
Table 3-21 Conversion operations
Executive Operations
CPU 928B Programming Guide
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