Emu XL-7 & MP-7 User's Group

Just did a quick test as follows [on XL-2500]:

(1) On C-2 of USer Table 1 I changed coarse to 127 and fine to 63.
(2) I requested table 1: f0 7e 00 08 00 00 f7

Here's the first part of the dump:

F0 7E 00 08 01 00 [header]
55 73 65 72 20 54 75 6E 69 6E 67 20 30 30 30 20 [name]
7F 7E 00 [C-2]
01 00 00 [C#-2]

(3) I then changed C-2 back to its original
00 00 00

(4) Since I added 03, I subtracted 03 from the check sum.
37 became 34

(5) I then sent the dump back and since I had the table up
 on display, I saw the 127 and 63 change back to 000 and 00.

I imagine the other P2Ks should work the same way.

BTW, I seem to recall on the P2K message board a few of us discussed 
tuning systems. This was a year or two ago.

I will check out the single note change.

--Steve

PS: My checksum calculation (Roland gear) was either for the 
Commodore 64 or the Intel 8086/8088 and may have been in assembly 
lang. I would have used an 8 bit variable, shifted left, then right 
to drop the 8th bit and finally subtracted from 80h. If I ever find 
the code, I will check to see if I used the XOR.