Before first use, create a 1x4 matrix and call it "STACK".
Of course, the stack may not hold complex numbers or matrices.
Code: Select all
00 { 74-Byte Prgm }
01>LBL "PUSHST"
02 INDEX "STACK"
03 INSR
04 R^
05 STOEL
06 J+
07 R^
08 STOEL
09 J+
10 R^
11 STOEL
12 J+
13 R^
14 STOEL
15 EXITALL
16 RTN
17>LBL "POPST"
18 INDEX "STACK"
19 STO ST L
20 RCLEL
21 ENTER
22 ->
23 ENTER
24 ->
25 ENTER
26 ->
27 DELR
28 EXITALL
29 X<> ST L
30 END
Code: Select all
>LBL "POP2ST"
INDEX "STACK"
STO ST L
RCLEL
ENTER
ENTER
->
J+
ENTER
->
DELR
EXITALL
X<> ST L
RTN