forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 3
M88CS8001 Sat Receiver
Jonathan Neuschäfer edited this page May 19, 2022
·
7 revisions
Satellite TV receivers
-
SoC: M88CS8001
- CPU: 2x MIPS 24KE
- Embedded RAM: 64 MiB
-
Mainboard:
HS1168-8001-02(B) -
Case: Probably sold under many names, such as:
- PremiumX FTA 521S Digital HD receiver
-
I/O:
- back: LNB IN, USB type A , HDMI, SCART, "coaxial", RS-232, DC 12V in
- front: IR detector, 7-seg display, buttons (left, right, power), USB type A
Connector J3 connects the RS-232 port to the mainboard. The port runs at 12V and 115200 baud.
| pin | description |
|---|---|
| 1 | TX (0V/12V) |
| 2 | RX |
| 3 | GND |
Firmware is stored on a 4 MiB flash chip (EN25Q32).
start end description
00000000 00010000 bootloader
00010000 00010400 partition table
Excerpt of two different partition tables:
0x00010000 2A 5E 5F 5E 2A 44 4D 28 5E 6F 5E 29 00 00 3F 00 |*^_^*DM(^o^)..?.| \ 2A 5E 5F 5E 2A 44 4D 28 5E 6F 5E 29 00 00 3F 00 |*^_^*DM(^o^)..?.|
0x00010010 00 00 00 04 00 00 40 00 14 00 30 00 FC 00 01 00 |[email protected].....| / 00 00 00 04 00 00 40 00 15 00 30 00 FC 00 01 00 |[email protected].....|
0x00010020 00 04 00 00 BD 56 04 00 43 F1 C1 B4 30 30 30 30 |.....V..C...0000| \ 00 04 00 00 56 72 04 00 5E F3 FD 3F 30 30 30 30 |....Vr..^..?0000|
0x00010030 30 30 30 31 61 76 5F 63 70 75 00 00 E3 07 02 0E |0001av_cpu......| / 30 30 30 31 61 76 5F 63 70 75 00 00 E6 07 01 06 |0001av_cpu......|
0x00010040 0C 15 1D 00 00 00 00 00 00 00 00 00 89 00 01 00 |................| \ 0A 2A 38 00 00 00 00 00 00 00 00 00 89 00 01 00 |.*8.............|
0x00010050 BD 5A 04 00 30 46 03 00 4E 43 52 43 30 30 30 30 |.Z..0F..NCRC0000| / 56 76 04 00 54 53 03 00 4E 43 52 43 30 30 30 30 |Vv..TS..NCRC0000|
0x00010060 30 30 30 31 69 6D 67 00 00 00 00 00 E3 07 02 0E |0001img.........| \ 30 30 30 31 69 6D 67 00 00 00 00 00 E6 07 01 06 |0001img.........|
0x00010070 0C 11 29 00 00 00 00 00 00 00 00 00 88 00 01 00 |..).............| / 0A 29 29 00 00 00 00 00 00 00 00 00 88 00 01 00 |.)).............|
0x00010080 ED A0 07 00 18 24 23 00 4E 43 52 43 30 30 30 30 |.....$#.NCRC0000| \ AA C9 07 00 6C 42 21 00 4E 43 52 43 30 30 30 30 |....lB!.NCRC0000|
Details:
Partition table header
0x00010000 2A 5E 5F 5E 2A 44 4D 28 5E 6F 5E 29 |*^_^*DM(^o^) | Magic value
00 00 3F 00 | ..?.| unknown
0x00010010 00 00 00 04 |.... |
Partition entry
00 00 40 00 14 00 30 00 FC 00 01 00 | [email protected].....|
0x00010020 00 04 00 00 BD 56 04 00 |.....V..C...0000|
43 F1 C1 B4 | C... | CRC32 or 'NCRC'
30 30 30 30 | 0000| always '00000001'
0x00010030 30 30 30 31 |0001 |
61 76 5F 63 70 75 00 00 | av_cpu.. | partition name
E3 07 02 0E | ....| unknown
0x00010040 0C 15 1D 00 00 00 00 00 00 00 00 00 89 00 01 00 |................|
Code (e.g. in img) is loaded at 0x80200000.
- Ascent Communication Technology product page with some infos about the SoC
- partition table parser