UPD703003 datasheet(48/82 Pages) NEC

48 / 82 page

µPD703003

Data Sheet U12261EJ2V1DS00

Table 15-4. Flag Operations

Identifier

Description

(Blank)

No change

Clear to zero

Set or clear according to result

Restore previously saved value(s)

Table 15-5. Condition Codes

Condition name (cond)

Condition code (cccc)

Conditional expression

Description

0000

OV = 1

Overflow

1000

OV = 0

No overflow

C/L

0001

CY = 1

Carry

Lower (Less than)

NC/NL

1001

CY = 0

No carry

No lower (Greater than or equal)

Z/E

0010

Z = 1

Zero

Equal

NZ/NE

1010

Z = 0

Not zero

Not equal

0011

(CY OR Z) = 1

Not higher (Less than or equal)

1011

(CY OR Z) = 0

Higher (Greater than)

0100

S = 1

Negative

1100

S = 0

Positive

0101

–

Always (unconditional)

1101

SAT = 1

Saturated

0110

(S XOR OV) = 1

Less than signed

1110

(S XOR OV) = 0

Greater than or equal signed

0111

((S XOR OV) OR Z) = 1

Less than or equal signed

1111

((S XOR OV) OR Z) = 0

Greater than signed

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