NEC PD750008 - Manual (Page 274)

254
µPD750008 USER'S MANUAL
Subroutine stack control
In
Mne-
Number
Machine
Address-
struc-
monic
Operand of
cycle
Operation ing Skip condition
tion bytes area
RETS Note 1 3+S • µPD750004 Unconditionally
MBE, RBE, 0, 0 <– (SP+1)
PC
11-0
<– (SP)(SP+3)(SP+2)
SP <– SP+4
Then skip unconditionally
• µPD750006, µPD750008
MBE, 0, 0, PC
12
<– (SP+1)
PC
11-0
<– (SP)(SP+3)(SP+2)
SP <– SP+4
Then skip unconditionally
• µPD75P0016
MBE, RBE, PC
13
, PC
12
<– (SP+1)
PC
11-0
<– (SP)(SP+3)(SP+2)
SP <– SP+4
Then skip unconditionally
3+S • µPD750004
0, 0, 0, 0 <– (SP+1)
PC
11-0
<– (SP)(SP+3)(SP+2)
x, x, MBE, RBE <– (SP+4)
SP <– SP+6
Then skip unconditionally
• µPD750006, µPD750008
0, 0, 0, PC
12
<– (SP+1)
PC
11-0
<– (SP)(SP+3)(SP+2)
x, x, MBE, RBE <– (SP+4)
SP <– SP+6
Then skip unconditionally
• µPD75P0016
0, 0, PC
13
, PC
12
<– (SP+1)
PC
11-0
<– (SP)(SP+3)(SP+2)
x, x, MBE, RBE <– (SP+4)
SP <– SP+6
Then skip unconditionally
RETI Note 1 3 • µPD750004 Unconditionally
MBE, RBE, 0, 0 <– (SP+1)
PC
11-0
<– (SP)(SP+3)(SP+2)
PSW <– (SP+4)(SP+5), SP <– SP+6
• µPD750006, µPD750008
MBE, RBE, 0, PC
12
<– (SP+1)
PC
11-0
<– (SP)(SP+3)(SP+2)
PSW <– (SP+4)(SP+5), SP <– SP+6
• µPD75P0016
MBE, RBE, PC
13
, PC
12
<– (SP+1)
PC
11-0
<– (SP)(SP+3)(SP+2)
PSW <– (SP+4)(SP+5), SP <– SP+6
Note The shaded portion is supported in Mk II mode only. The other portions are supported in Mk I mode
only.