Toshiba TLCS-90 Series Data Book page 157

TOSHIBA
7
6
5
4
3
2
I
1
0
PSI':' PCB'\. 11
--------+---------
PC4 '\.
7 :
PCO '\.
3
Stack
Pointer
(7) Flag 0, Flag 1, (FO, Fl)
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
TMP8049PI-6,TMPB039PI-6
R~X
Address
• The TMPB049 has two flags FO and Fl which are used for conditional
jump.
These flags can be set, reset and tested with the conditional jump
instruction JFO.
• FO is a part of the program status word (PSW) and is saved in the stack
area when a subroutine is called.
(B)
Program Status Word (PSW)
• An 8-bit status word which can be loaded to and from the accumlator exists
called the Program Status Word (PSW). The PSW is read by a MOV A, PSW and
written to by a MOV PSW, A. The information available in the PSW is shown
in the diagram below.
MCU48-147