Push yl, Push yp, Push yl onto stack – Epson 6200A User Manual
Page 77: Push yp onto stack
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
71
3 INSTRUCTION SET
PUSH YL
Push YL onto stack
PUSH YL
SP'
←
SP - 1, M(SP')
←
YL
1
1
1
1
1
1
0
0
1
0 0
1
FC9H
VI
5
Not affected
Not affected
Not affected
Not affected
Decrements the stack pointer by 1 and loads the contents of YL, the four low-order
bits of YHL, into the data memory location addressed by SP.
PUSH YL
SP
D0
CF
Memory (CFH)
0001
0111
YL register
0111
0111
PUSH YP
Push YP onto stack
PUSH YP
SP'
←
SP - 1, M(SP')
←
YP
1
1
1
1
1
1
0
0
0
1 1
1
FC7H
VI
5
Not affected
Not affected
Not affected
Not affected
Decrements the stack pointer by 1 and loads the contents of YP, the page part of
IY, into the data memory location addressed by SP.
PUSH YP
SP
C0
BF
Memory (BFH)
1111
0000
YP register
0000
0000
2
3
2
2
2
1
2
0
M(SP) =
= YL
2
0
2
1
2
2
2
3
2
3
2
2
2
1
2
0
M(SP) =
= YP
2
0
2
1
2
2
2
3