Reading old HP-65 program cards

[[kby]]

I don’t have time right now, but, although I think this list looks mostly ok, there are a couple that don’t look right. The ones I notice would not be relevant to any card you get from NASA as they are opcodes that don’t correspond to keystrokes that can be programmed. In particular, 39 (octal 47) will show as a CHS in PRGM mode, but does not act that way with certain prefixes. 40 (octal 50) will appear as 02, but ‘executes’ as SST.

This info is in 65-notes V3 N7 p3 in the article titled “What are the Limits” by Lou Cargile and Gene Hoffman. It is an excellent but somewhat dense read. It includes examples of using the Magna-See although the pictures aren’t all that great due to the circa mid 1970s photocopy quality.

-kby

(03-03-2021 12:28 AM)teenix Wrote:  

(03-02-2021 11:53 PM)Gene Dorr Wrote:  That's certainly helpful. It looks like there's no header at all, just the raw program memory. Any clue where I might find the decoding of the 6-bit values beyond what is shown in the example?

0 NOP
1 STO 4
2 3
3 2
4 1
5 STO 6
6 x
7 x!=y?
8 g
9 ROLUP
10 RCL
11 STO
12 f-1
13 ROLDN
14 f
15 RCL 8
16 RCL 7
17 X<>Y
18 6
19 5
20 4
21 RCL 6
22 +
23 RCL 4
24 E
25 x=y?
26 D
27 C
28 B
29 RCL 5
30 A
31 RCL 3
32 RCL 2
33 RCL 1
34 R/S
35 .
36 0
37 STO 7
38 /
39 A
40 B
41 x>y?
42 RTN
43 LBL
44 GTO
45 STO 5
46 DSP
47 STO 3
48 STO 2
49 STO 1
50 9
51 8
52 7
53 STO 8
54 -
55 x<=y?
56 CLx
57 Sub Pointer
58 EEX
59 CHS
60 LSTx
61 Pointer
62 ENTER
63 Top Of Memory

cheers

Tony