NMT C200 Deep

C200 Deeper thoughts

The /tmp/setting.txt file has the following:

bluray_region=a
bluray_region_cnt=1
dvd_region=1
dvd_region_cnt=1

Can we change that directly and it'll work (for the session)? Can we use the pflash tool to write it to nvram?

C200 has Remote control codes:

slow+1683 : Set bluray region
slow+1663 : Set DVD region

Are there more?

For DVDs, the region is set using:

./sigma/bin/drive_ops

However, no real need to poke in there, since if your drive is rpc1, it doesn't matter. If your drive ISN'T rpc1, you will have only 5 changes enforced by the drive.

Bluray region is handled by:

./app/lib/libsyabas_framework_lib.so

If you wanted to do it the tedious way:

▒│.text:00003CC0                 lw      $t9, (xosd_command_stub - 0x215A0)($gp)
▒│.text:00003CC4                 li      $a3, 0x2000
▒│.text:00003CC8                 sw      $v0, 0x208+var_1F4($sp)
▒│.text:00003CCC                 move    $a0, $0   
▒│.text:00003CD0                 move    $a1, $s7
▒│.text:00003CD4                 sw      $s3, 0x208+var_1F0($sp)
▒│.text:00003CD8                 jalr    $t9
▒│.text:00003CDC                 sw      $0, 0x208+var_1F8($sp)
▒│.text:00003CE0                 lw      $gp, 0x208+var_1E8($sp)
▒│.text:00003CE4                 addiu   $a1, $sp, 0x208+var_1E0
▒│.text:00003CE8                 lw      $v0, (CreateDialog - 0x215A0)($gp)
▒│.text:00003CEC                 lw      $t9, (xwrite_str_stub - 0x215A0)($gp)
▒│.text:00003CF0                 addiu   $a0, $v0, 0x89B4  # "bluray region"
▒│.text:00003CF4                 lw      $v0, 0x208+var_1D8_bluray_cnt($sp)
▒│.text:00003CF8                 addiu   $v0, 1           # Might want to NOT increase me
▒│.text:00003CFC                 jalr    $t9
▒│.text:00003D00                 sw      $v0, 0x208+var_1D8_bluray_cnt($sp)
▒│.text:00003D04                 lw      $gp, 0x208+var_1E8($sp)
▒│.text:00003D08                 addiu   $a0, $fp, 0x208+var_7844
▒│.text:00003D0C                 lw      $t9, (off_196C8 - 0x215A0)($gp)  # sub_79d0
▒│.text:00003D10                 jalr    $t9
▒│.text:00003D14                 addiu   $a1, $sp, 0x208+var_1D8_bluray_cnt
▒│.text:00003D18                 lw      $gp, 0x208+var_1E8($sp)
▒│.text:00003D1C                 lw      $t9, (xsave_commit_stub - 0x215A0)($gp)
▒│.text:00003D20                 jalr    $t9
▒│.text:00003D24                 nop
▒│.text:00003D28                 li      $v0, 1
▒│.text:00003D2C                 xori    $v0, 1
▒│.text:00003D30                 lw      $gp, 0x208+var_1E8($sp)
▒│.text:00003D34                 b       bluray_cancelORerror
▒│.text:00003D38                 sltu    $s1, $0, $v0

.text:00003CF0 B4 89 44 24 30 00 A2 8F 01 00 42 24 09 F8 20 03