Epson S1C6200A - Page 84

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 –
78 EPSON S1C6200/6200A CORE CPU MANUAL
3 INSTRUCTION SET
SCPX MX,r Subtract with carry r-register from M(X) and increment X by 1
SCPX MX,r
M(X) ← M(X) - r - C, X ← X + 1
11110011 1 0r1 r0 F38H to F3BH
V
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 r-register from the data memory
location addressed by IX. X is incremented by 1. Incrementing X does not affect
the flags.
SCPX MX,B
X register 0101 0000 0101 0001
Memory (50H) 0110 0100
B register 0010 0010
C flag 0 0
Z flag 0 0
SCPY MY,r Subtract with carry r-register from M(Y) and increment Y by 1
SCPY MY,r
M(Y) ← M(Y) - r - C, Y ← Y + 1
11110011 1 1r1 r0 F3CH to F3FH
V
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 r-register from the data memory
location addressed by IY. Y is incremented by 1. Incrementing Y does not affect
the flags.
SCPY MY,A
Y register 1111 1111 0000 0000
Memory (FFH) 0111 0100
A register 0010 0010
C flag 1 0
Z flag 1 0