| Title: | * * Computer Music, MIDI, and Related Topics * * |
| Notice: | Conference has been write-locked. Use new version. |
| Moderator: | DYPSS1::SCHAFER |
| Created: | Thu Feb 20 1986 |
| Last Modified: | Mon Aug 29 1994 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2852 |
| Total number of notes: | 33157 |
I scaned the notes but found not what I needed so........
I have brought the TXNEW.ARC file to my local VAX and downloaded it to
my PC using Kermit (yes, I set file type binary). I got no errors in
either the move from DYO780 and/or MIDI in the process; nor did I get
any error in the download from my local VAX to PC. However, when I used
PKUNPAK to unpak the 27 banks of patches and tried to load them onto my
DX11 (should handle all the TX81Z banks) I got 12 to load into my DX11
just fine but 15 gave me a checksum error on my keyboard LCD readout.
So............two questions..........
Does anyone know the whereabouts of a "good" TXNEW.ARC file?????
Does anyone know of a routine to calculate the correct checksum for a patch
dump for the YAMAHA TX81Z/DX11?????????
Any help would be greatly appreciated. The time I have spent trying to
eliminate operator error is discouraging, but that's part of the hobby,
I guess.
Thanks in advance
A novice who is quickly learning
Gil
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2380.1 | I'm getting lotsa mileage outta this ... | WEFXEM::COTE | You make the knife feel good... | Fri Jun 29 1990 10:30 | 11 |
The C code for figuring out a Yamaha check-sum is posted in note 146.
I've verified it's accuracy for single patches for both the TX81Z and
the DX21. The documentation states the same algorythm is used for all
the various dumps for the TX81Z and, most likely, all of Yamaha's gear.
The checksum is the two's compliment of the 7 LSDs of the sum of all
the DATA bytes (DATA ONLY!) in the dump. Don't include the header
information....
Edd
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| 2380.2 | DCSVAX::COTE | You make the knife feel good... | Fri Jun 29 1990 13:50 | 8 | |
By the way, I wouldn't sweat a checksum error too much. A complete
bank dump consists of 4096 bytes, any of which, if off by any amount,
will generate a checksum error. (Actually, the error could actually be
a bad checksum, which means the data was correct!)
Nothing evil will happen if you ignore the error.
Edd
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| 2380.3 | DX11 rejects bad checksum patch | CSOA1::BREZLER | Fri Jun 29 1990 14:58 | 7 | |
I think you are correct about the lack of evil doings for a bad
checksum on a patch. However my DX11 will not accept the patch with the
bad check sum. It totally rejects the patch. Any idea of how to overide
this checksum detection in the DX11?
Gil
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| 2380.4 | KOBAL::DICKSON | Mon Jul 02 1990 13:38 | 3 | ||
re .1, when you say DATA ONLY, does that mean that the ASCII header
string in the ACED data is included or not included? (The part that
goes something like "LM__1234XX".)
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| 2380.5 | Where'd you get that from??? | WEFXEM::COTE | You make the knife feel good... | Mon Jul 02 1990 13:52 | 5 |
While I can't be sure, (because I've never seen anything resembling
"LM__1234XX" in any dump I've ever dissected) I'll go out on a limb
and say "don't include it".
Edd
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| 2380.6 | Example | WEFXEM::COTE | You make the knife feel good... | Mon Jul 02 1990 13:58 | 20 |
I forget what patch this is for, but it works. The first data byte (31)
should be the AR for Op 4... (I think. Listen folks, if I ever get to
the point where I can read sys-ex dumps will someone slap me???)
#include <stdio.h>;
int i,limit={92},mask=127;
unsigned int adder={0};
unsigned int sysex[]={31,18,15,14,09,00,
01,00,00,07,48,45,06,31,15,05,07,15,00,00,00,
00,04,87,00,00,31,18,06,06,13,42,00,00,00,03,
99,04,00,31,18,06,06,15,22,00,00,00,07,99,04,
06,04,06,24,00,02,00,00,02,06,00,24,00,03,00,
00,99,01,00,01,50,00,50,00,50,00,79,78,76,89,
32,76,79,78,76,89,99,99,99,50,50,50};
main()
{
for (i=0;i<=limit;i++)
adder+=sysex[i];
printf("checksum: %x\n\n",((~adder)+1)&mask);
}
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| 2380.7 | KOBAL::DICKSON | Mon Jul 02 1990 17:58 | 4 | ||
I got it from the SYSEX pages of my TX81Z manual. Look at the format
given for sending an ACED bulk load. (Ignore the typo that calls it
the SCED format. There is no such thing as an SCED format, and the "A"
and "S" keys are adjacent on the keyboard...)
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| 2380.8 | Include... | WEFXEM::COTE | You make the knife feel good... | Tue Jul 03 1990 10:34 | 6 |
Hmmmm... new to me! But, righ there on page 68 is says that the ASCII
header are considered to be part of the data.
What *is* ACED format? How and why does it differ from VCED?
Edd
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| 2380.9 | DCSVAX::COTE | You make the knife feel good... | Tue Jul 03 1990 12:14 | 6 | |
....answered it myself, I think. The ACED are the parameters not shared
with the earlier 4-op machines like the DX21, 100, 27... It looks like
this would include the alternate waveforms, coarse and fine tune,
etc...
Edd
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