251
CHAPTER 11 INSTRUCTION SET
In Mne-
Number Machine
Address-
struc- monic Operand of cycle Operation ing Skip condition
tion bytes area
BR BCXA 2 3 µPD750004 *11
PC
11-0
<– BCXA
Note 1
µPD750006, µPD750008
PC
12-0
<– BCXA
Note 2
µPD75P0016
PC
13-0
<– BCXA
Note 3
BRA
Note 1
!addr1 3 3 µPD750004 *11
PC
11-0
<– addr
µPD750006, µPD750008
PC
12-0
<– addr
µPD75P0016
PC
13-0
<– addr1
BRCB !caddr 2 2 µPD750004 *8
PC
11-0
<– caddr
11-0
µPD750006, µPD750008
PC
12-0
<– PC
12
+caddr
11-0
µPD75P0016
PC
13-0
<– PC
13, 12
+caddr
11-0
CALLA
Note 2
!addr1 3 3 µPD750004 *11
(SP–2) <– x, x, MBE,RBE
(SP–6)(SP–3)(SP–4) <– PC
11-0
(SP–5) <– 0, 0, 0, 0
PC
11-0
<– addr, SP <– SP–6
µPD750006, µPD750008
(SP–2) <– x, x, MBE,RBE
(SP–6)(SP–3)(SP–4) <– PC
11-0
(SP–5) <– 0, 0, 0, PC
12
PC
12-0
<– addr, SP <– SP–6
µPD75P0016
(SP–2) <– x, x, MBE,RBE
(SP–6)(SP–3)(SP–4) <– PC
11-0
(SP–5) <– 0, 0, PC
13
, PC
12
PC
13-0
<– addr1, SP <– SP–6
Note 1. The shaded portion is supported in Mk II mode only.2. The shaded portion is supported in Mk II mode only. The other portions are supported in MkI mode only.
Branch
Subroutine stack control