DigiTech Midi Implementation Manual page 12

RECEIVE ONE PROGRAM (01000010b 42h)
SYSX_HEADER 42h yy zz d(1) d(1)' ... d(n) d(n)' EOX
SYSX_HEADER 42h zz d(1)' ... d(n)' EOX (For IPS 33B only)
yy 0000000vb where v is bit 7 of the received program number - 1.
zz 0vvvvvvvb where v is bits 6 through 0 of the received
program number - 1.
d(c) 0000000vb where v is bit 7 of the cth byte of the received program.
d(c)' 0vvvvvvvb where v is bits 6 through 0 of the cth byte of the received
program.
The RECEIVE ONE PROGRAM procedure is used to load a program into the
DigiTech device. The number of program bytes to be received (n) is different
for each DigiTech device.