Studer A820 MCH firmware / software for EPROM (re)programming. Some of these files can be used for other studer A8x series decks. Confirmed working on our machine -- had to replace various 27128 eproms; flashed with TL866-3G USB programmer and XGecu software on Windows 10. (source)
Includes:
1.820.985.30.16.35.95 - "Tape Deck" (8c5e0af9)
1.820.985.30.18.35.95 - "Tape Deck" (d4c0a0ae)
1.820.986.24.15.04.91a - "Master" (0e7c0dd5)
1.820.986.24.15.04.91b - "Master" (675c93b7)
1.820.986.24.15.04.91c - "Master" (fb85644a)
1.820.986.24.15.04.91d - "Master" (c45f6f7a)
1.820.986.24.16.04.91 - "Master" (0b30e8d0)
1.820.986.24.18.04.91 - "Master" (4c573a4f)
1.820.987.24.15.41.90 - "Audio" (df28be30)
1.820.987.24.16.41.90 - "Audio" (4f71a756)
1.820.987.24.18.41.90 - "Audio" (49a73b93)
1.820.988.25.18.42.90 - "VU-Panel" (4a68109a)
1.820.989.20.15.42.90 - "Audio Control MKII" (df28be30)
1.820.989.20.16.42.90 - "Audio Control MKII" (2cfef682)
1.820.989.20.18.42.90 - "Audio Control MKII" (bcc56d48)
1.820.994.27.17.10.92 - "Capstan" (d128584a)
"The files named 1.820.986.24.15.04.91* are the 4 seperate pages of 1.820.986.24.15.04.91 (27513 chip)"
(checksums on list above are CRC32, not 4 digit. can verify checksums against Studer service manual / list with your programmer)