Epson S1C6200A - Call Subroutine

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 s0
0100s7 s6 s5 s4 s3 s2 s1 s0 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 s0
0101s7 s6 s5 s4 s3 s2 s1 s0 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