[sebhc] Tape images
CarrollWaddell at sc.rr.com
Fri May 14 14:03:46 CDT 2004
What you suggest is not outside the realm of possibility. As well as
memory serves, Heath recommended that you do a load and then a dump to
create a working image of the software. The CRC bytes are not stored in
memory. They are generated by the monitor program as tape is being
loaded or written.
Also, I have used this HASL image on my H8 without any trouble.
Also again, here are the program version numbers of the PID software
that I uploaded.
HASL-8 Issue # 04.05.00
TED-8 Issue # 3.05.00
BUG-8 Issue # 02.05.00
BH Basic Issue # 05.01.02
Extended BH Basic Issue # 10.05.00
Hangman Issue # 20.00.00
If I can create any more confusion, don't hesitate to let me know. I'm
know far and wide for my confusinating skills.
Steven Parker wrote:
> Carroll says:
>> I loaded the tapes into the H8. Then changed the NORM INTCG switch to
>> INTHG. Then pressed the dump key on the H8. This sent the tape from
>> memory to my PC just as if I had written another copy of the tape.
>> The H8 recreates the CRC after the data is written (Done by PAM-8)
>> and writes the CRC.
> Now I'm really confused. If the files were made from memory, then
> it's possible that a glitch could alter them but still have a good
> checksum. But PAM-8 actually writes out the CRC twice. (The 2nd time
> is just to be sure that the first one gets out cleanly). Your files
> have it once, followed by $FF.
>> Also, if you can find a PAM-8 listing, you can find the routines
>> there to read, write, generate, and check the data and CRC.
> The listing is in the FTP archives.
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