FreeCalypso > hg > fc-magnetite

annotate doc/C139-Howto @ 107:267cefdca4b6

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src/g23m-gsm/l1/l1_pei.c: tweaked to match TCS211 binary object
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 05 Oct 2016 22:41:43 +0000
parents 48792a467305
children e2dce971aec9
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1 Running FreeCalypso firmware on the Motorola C139
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2 =================================================
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3
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4 Mot C139 phones are brickable - because the Calypso boot ROM is disabled by PCB
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5 wiring, the ability to reflash a phone with new firmware critically depends on
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6 there being a particular kind of boot code in flash sector 0 at all times - a
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7 particular kind of boot code that allows the boot process to be interrupted and
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8 diverted to external code loaded via the headset jack serial port.
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9
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10 The FreeCalypso project has adopted one specific version of the flash sector 0
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11 boot code (produced by applying a binary patch to one of Compal/Motorola's
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12 original versions) for use with all of our firmwares for this target. No matter
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13 which FreeCalypso firmware you are running - Citrine, Magnetite or tcs211-c139 -
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14 you flash your FC fw image at offset 0x10000 while keeping this boilerplate boot
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15 code at the beginning of the flash:
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16
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17 ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/compal-flash-boot-for-fc.bin
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18
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19 Because neither FC Citrine nor FC Magnetite implements any phone UI or puts
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20 anything at all on the LCD, when a C139 phone is flashed with one of our
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21 firmwares, it will behave very oddly:
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22
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23 * Whenever the phone is off but the battery is inserted, even a momentary
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24 accidental press of the power button will launch a full power-on and firmware
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25 boot - without any visible indication whatsoever as the LCD stays dark!
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26
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27 * Once the firmware has booted from a press of the power button - even a
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28 momentary accidental press - there is no way to make it shut down and power
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29 off except by sending a power-off command via the headset jack serial port.
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30 So it will just keep running until the battery runs down, once again with the
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31 LCD dark and no visible indication of any kind that it's on.
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32
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33 Additional considerations are:
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34
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35 * Flashing a given phone back and forth between FreeCalypso and Mot/Compal's
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36 official firmware is a royal pita, so if you are going to play with
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37 FreeCalypso on a C139, it would be the easiest to dedicate a phone
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38 specifically for FC experiments;
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39
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40 * We haven't got firmware-controlled battery charging working yet, so you will
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41 need another phone running one of the official fw versions to charge
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42 batteries.
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43
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44 Converting a phone to FreeCalypso
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45 =================================
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46
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47 Start by installing FreeCalypso host tools on your PC/laptop or whatever host
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48 you will use to talk to C139 phones, if you haven't already. If you are
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49 starting with an unhacked C139 phone running one of the official firmware
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50 versions, the procedure for flashing and bringing up FreeCalypso for the first
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51 time is as follows:
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52
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53 * Note down your phone's factory IMEI. After you get FreeCalypso firmware
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54 flashed and running, you will need to set your own IMEISV, as our fw doesn't
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55 know how to grok Mot/Compal's flash data structures where they store theirs.
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56 You can set whatever IMEISV you like, but if you would like to keep the
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57 factory one, it would be the easiest to have it noted down on a piece of
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58 paper. If you have a labelmaker, you can print a sticky label with the IMEI
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59 and stick it on the side of the phone where you can easily see it later while
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60 playing with FreeCalypso.
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61
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62 * Get in with fc-loadtool, preceded with tfc139 if necessary - see FC host tools
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63 documentation.
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64
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65 * Once you are in with fc-loadtool, i.e., at the loadtool> prompt, reflash the
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66 boot sector with the FreeCalypso version:
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67
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68 loadtool> flash erase-program-boot compal-flash-boot-for-fc.bin
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69
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70 * Flash whichever FreeCalypso firmware image you would like to play with, e.g.:
94
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71
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72 loadtool> flash erase 0x10000 0x230000
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73 loadtool> flash program-bin 0x10000 fwimage.bin
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74
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75 * Erase the flash sectors to be used for the FFS (flash file system) by
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76 FreeCalypso firmwares:
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77
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78 loadtool> flash erase 0x3C0000 0x30000
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79
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80 * Exiting fc-loadtool cleanly will cause it to power off the phone:
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81
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82 loadtool> exit
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83
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84 Reflashing between different FreeCalypso firmwares
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85 ==================================================
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86
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87 By the conventions established in the FreeCalypso project, all of our firmwares
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88 for the C139 target have the following in common:
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89
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90 * They all stay out of the boot sector and expect to receive control from the
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91 boot code in the same manner (boot entry point at 0x10058, exception vectors
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92 at 0x10000), thus there is no need to reflash the dangerous boot sector when
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93 going from one FC firmware to another.
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94
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95 * They all use the same aftermarket FFS configuration of 3 sectors of 64 KiB
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96 each (64x3) at 0x3C0000. This FFS location is deliberately different from
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97 the one used by Mot/Compal's firmwares, eliminating the possibility of one fw
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98 trying to use the FFS created by the other, and by putting our FFS toward the
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99 end of the flash we maximize the amount of flash space available for our
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100 firmware code images. But even though we don't share our FFS with
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101 Mot/Compal's official firmwares, we do share the same FFS between all of
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102 FreeCalypso firmware projects - thus once you have initialized your FFS (see
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103 below) with one FC firmware version, it will work with the others as well.
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104
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105 If you need to reflash your C139 from one FC firmware version to another,
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106 simply get in with fc-loadtool -h compal (no more need for the inefficient
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107 -c 1003 or -c 1004 options or for tfc139) and reflash just the fw image part:
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108
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109 loadtool> flash erase 0x10000 0x230000
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110 loadtool> flash program-bin 0x10000 fwimage.bin
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111
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112 First boot of the firmware
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113 ==========================
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114
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115 Connect the serial cable, but instead of running fc-loadtool, run rvinterf.
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116 Press the red power button on the phone briefly just like you would for
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117 fc-loadtool entry. Because there is no fc-loadtool running on the host end of
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118 the serial cable, the boot path will *not* be diverted in the bootloader, and
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119 the main fw image will run - and this time it will be the FreeCalypso firmware
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120 you have compiled and flashed. The phone's LCD will remain dark as there is no
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121 LCD driver code in this firmware, but you will see trace output in the rvinterf
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122 window, telling you that the fw is running.
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123
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124 Before you do anything else, you will need to run fc-fsio and initialize the
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125 aftermarket FFS for our firmware:
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126
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127 fsio> format /
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128 fsio> mk-std-dirs
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129 fsio> set-imeisv fc XXXXXXXX-YYYYYY-ZZ (punctuation optional, place anywhere)
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130 fsio> set-rfcap dual-eu (if you have 900+1800 MHz hardware)
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131 or
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132 fsio> set-rfcap dual-us (if you have 850+1900 MHz hardware)
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133
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134 After you've initialized your FFS as above, you can exit fc-fsio, run fc-shell
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135 and try some AT commands:
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136
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137 AT+CMEE=2 -- enable verbose error responses
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138 AT+CFUN=1 -- enable radio and SIM interfaces
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139 AT+COPS=0 -- register to the default GSM network
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140
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141 When you are done, you can power the phone off by sending a 'poweroff' command
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142 through fc-shell. The only other way is to yank the battery, and doing the
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143 latter is recommended anyway: when a phone with the present hack-firmware
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144 flashed into it is powered off but still has the battery inserted, even a
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145 momentary accidental press of the power button will cause it to power on and
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146 boot, but there will be absolutely no visual indication, as the LCD stays dark.
95
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147
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148 Magnetite-specific notes
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149 ========================
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150
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151 Just like FC Citrine, FC Magnetite currently supports only AT command operation
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152 via fc-shell; the C-Sample UI hack we have built earlier in tcs211-c139 has NOT
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153 been incorporated into Magnetite - at least not yet.
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154
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155 When compiling our Magnetite firmware for the C139 target, you will need to
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156 select the l1reconst configuration - it is the only currently available
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157 configuration that works on this target. Therefore, you configure.sh command
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158 should be:
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159
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160 ./configure.sh c139 l1reconst
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161
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162 See the Compiling write-up for more details.
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163
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164 Because we have not deblobbed the G23M firmware component yet (the l1reconst
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165 configuration uses G23M binary blobs from TCS211/Sotovik), your Magnetite fw
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166 build will include FAX_AND_DATA and GPRS functionality. In the FreeCalypso
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167 environment where we are not doing WAP or MMS this functionality can only be
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168 exercised on targets that bring out a classic modem UART with the classic AT
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169 command interface to the external host, but Mot C139 is not one of those
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170 targets - hence on the C139 all FAX_AND_DATA and GPRS code is nothing but dead
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171 weight. We will only be able to remove this dead weight when and if we fully
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172 deblob all of L1 and G23M, so it will be a while before we get there, and we'll
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173 have to carry the dead weight until then.