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3 INSTRUCTION SET
PUSH XP
Source Format:
Operation:
OP-Code:
Type:
Clock Cycles:
Flag:
Description:
Example:
PUSH YH
Source Format:
Operation:
OP-Code:
Type:
Clock Cycles:
Flag:
Description:
Example:
70
Push XP onto stack
PUSH XP
SP'
SP - 1, M(SP')
1 1 1 1 1 1 0 0
MSB
VI
5
C –
Not affected
Z –
Not affected
D –
Not affected
I –
Not affected
Decrements the stack pointer by 1 and loads the contents of XP, the page part of
IX, into the data memory location addressed by SP.
SP
D0
Memory (CFH)
0011
XP register
0000
Push YH onto stack
PUSH YH
SP'
SP - 1, M(SP')
1 1 1 1 1 1 0 0
MSB
VI
5
C –
Not affected
Z –
Not affected
D –
Not affected
I –
Not affected
Decrements the stack pointer by 1 and loads the contents of YH, the four high-
order bits of YHL, into the data memory location addressed by SP.
SP
BF
Memory (BEH)
0100
YH register
0001
XP
0 1 0 0
LSB
M(SP) =
PUSH XP
CF
0000
0000
YH
1 0 0 0
LSB
M(SP) =
PUSH YH
BE
0001
0001
EPSON
FC4H
3
2
1
0
2
2
2
2
2
2
2
2
FC8H
2
3
2
2
2
1
2
0
2
2
2
2
S1C6200/6200A CORE CPU MANUAL
0
1
= XP
2
3
0
1
= YH
2
3
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