Source Format:
Operation:
OP-Code:
Type:
Clock Cycles:
Flag:
Description:
Example:
Source Format:
Operation:
OP-Code:
Type:
Clock Cycles:
Flag:
Description:
Example:
MSB
LSB
MSB
LSB
C –
Z –
D –
I –
C –
Z –
D –
I –
S1C6200/6200A CORE CPU MANUAL
EPSON
77
3 INSTRUCTION SET
SBC r,q
Subtract with carry q-register from r-register
SBC r,q
r
←
r - q - C
1
0
1
0
1
0
1
1
r
1
r
0
q
1
q
0
AB0H to ABFH
IV
7
Set if a borrow is generated; otherwise, reset.
Set if the result is zero; otherwise, reset.
Not affected
Not affected
Subtracts the carry flag and the contents of the q-register from the r-register.
SBC A,B
SBC MY,MX
A register
1110
1011
1011
B register
0010
0010
0010
Memory (MX)
1001
1001
1001
Memory (MY)
0100
0100
1011
C flag
1
0
1
Z flag
0
0
0
SCF
Set carry flag
SCF
C
←
1
1
1
1
1
0
1
0
0
0
0 0
1
F41H
VI
7
Set
Not affected
Not affected
Not affected
Sets the C (carry) flag.
SCF
C flag
0
1
Summary of Contents for S1C6200
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