Call s, Calz s, Call subroutine – Epson 6200A User Manual
Page 40: Call subroutine at page zero
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 –
34
EPSON
S1C6200/6200A CORE CPU MANUAL
3 INSTRUCTION SET
CALL s
Call subroutine
CALZ s
Call subroutine at page zero
Source Format:
Operation:
OP-Code:
Type:
Clock Cycles:
Flag:
Description:
Example:
Source Format:
Operation:
OP-Code:
Type:
Clock Cycles:
Flag:
Description:
Example:
C –
Z –
D –
I –
C –
Z –
D –
I –
CALL s
M(SP-1)
←
PCP, M(SP-2)
←
PCSH, M(SP-3)
←
PCSL + 1, SP
←
SP - 3,
PCP
←
NPP, PCS
←
s
7
to s
0
0
1
0
0 s
7
s
6
s
5
s
4
s
3
s
2
s
1
s
0
400H to 4FFH
I
7
Not affected
Not affected
Not affected
Not affected
Pushes the program counter (PCP, PCS) onto the stack as the return address,
then calls the subroutine addressed by NPP and the 8-bit operand.
PSET 06H
CALL 10H
PCP
0011
0011
0110
PCS
0010 1100
0010 1100
0001 0000
NPP
0001
0110
0110
SP
C0
C0
BD
Memory (SP-1)
xxxx
xxxx
0011
Memory (SP-2)
xxxx
xxxx
0010
Memory (SP-3)
xxxx
xxxx
1101
CALZ s
M(SP-1)
←
PCP, M(SP-2)
←
PCSH, M(SP-3)
←
PCSL + 1, SP
←
SP - 3,
PCP
←
0, PCS
←
s
7
to s
0
0
1
0
1 s
7
s
6
s
5
s
4
s
3
s
2
s
1
s
0
500H to 5FFH
I
7
Not affected
Not affected
Not affected
Not affected
Pushes the program counter (PCP, PCS) onto the stack as the return address,
then calls the subroutine addressed by the 8-bit operand. As NPP is reset to 0H,
only a subroutine in page 0 can be called.
CALZ 10H
PCP
1010
0000
PCS
0010 1110
0001 0000
SP
CA
C7
Memory (SP-1)
xxxx
1010
Memory (SP-2)
xxxx
0010
Memory (SP-3)
xxxx
1111
MSB
LSB
MSB
LSB