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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 –
70 EPSON S1C6200/6200A CORE CPU MANUAL
3 INSTRUCTION SET
PUSH XP Push XP onto stack
PUSH XP
SP' ← SP - 1, M(SP') ← XP
11111100 0 100 FC4H
VI
5
Not affected
Not affected
Not affected
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.
PUSH XP
SP D0 CF
Memory (CFH) 0011 0000
XP register 0000 0000
PUSH YH Push YH onto stack
PUSH YH
SP' ← SP - 1, M(SP') ← YH
11111100 1 000 FC8H
VI
5
Not affected
Not affected
Not affected
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.
PUSH YH
SP BF BE
Memory (BEH) 0100 0001
YH register 0001 0001
2
3
2
2
2
1
2
0
M(SP) =
= XP
2
0
2
1
2
2
2
3
2
3
2
2
2
1
2
0
M(SP) =
= YH
2
0
2
1
2
2
2
3