A new old bug in the printer ROM?

[ThomasF]

Hi Christoph,

Thanks for your reply and comments!

The output from your updated HP82240B.exe looks very nice! Looks very close to the original, even the plot is well aligned now

Out of curiosity, how does it achieve this? Is this using the new 82143-mode?
I guess that the HP82240B.exe also could be used with a serial port and RedEye hardware and a real calculator.
I saw that you even got the delta-character correct - nice! The DM41X sends the character 0xBA (186) which is something else in the current 82240 emulator ...

So, this probably leaves me with that the DM41X has some faults in its implementation of the "glue" between the printer ROM and the IR-transmitter.

This is how the DM41X prints the first 128 characters:

Code:

     0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F
00  86 82 BA 8E 8C DE BA XX BA BA YY BA 8F A0 BA F0
10  BA BA BA D0 C0 D8 CC AE DA DB CF D3 BA 8B AF 7F
20  20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F
30  30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
40  40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
50  50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D ZZ 5F
60  60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F
70  70 71 72 73 74 75 76 77 78 79 7A 87 7C 8D 85 94

XX -> ESC{7:00.10.20.7E.20.10.00} (chr 7)
YY -> ESC{7:00.08.1C.3E.1C.08.00} (chr 10)
ZZ -> ESC{7:00.08.04.7E.04.08.00} (chr 94)

But, I still hope someone could shed some light but running the small test-program on a HP41 with the IR-module (82242) towards a real 82240 or with your emulator.

Best regards,
Thomas