[Hardware Hacking General] AdamOutler:
These four logs are from UART, Boot On and Boot Off, Powered and Unpowered at the USB jack. I skipped waiting for "BOOTING COMPLETE" on each log.

here's the Factory mode Boot OFF-UART unpowered Boots normally

1
-----------------------------------------------------------
Samsung Primitive Bootloader (PBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010
-----------------------------------------------------------

+n1stVPN 2688
+nPgsPerBlk 64
PBL found bootable SBL: Partition(3).

Set cpu clk. from 400MHz to 800MHz.
OM=0x9, device=OnenandMux(Audi)
IROM e-fused - Non Secure Boot Version.

-----------------------------------------------------------
Samsung Secondary Bootloader (SBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010

Board Name: ARIES REV 03
Build On: Feb 1 2011 10:54:21
-----------------------------------------------------------

Re_partition: magic code(0x0)
[PAM: ] ++FSR_PAM_Init
[PAM: ] OneNAND physical base address : 0xb0000000
[PAM: ] OneNAND virtual base address : 0xb0000000
[PAM: ] OneNAND nMID=0xec : nDID=0x50
[PAM: ] --FSR_PAM_Init
fsr_bml_load_partition: pi->nNumOfPartEntry = 12
partitions loading success
board partition information update.. source: 0x0
Now Read Images - ID : 1
.Done.
read 1 units.
==== PARTITION INFORMATION ====
ID : IBL+PBL (0x0)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 0
NO_UNITS : 1
===============================
ID : PIT (0x1)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 1
NO_UNITS : 1
===============================
ID : EFS (0x14)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 2
NO_UNITS : 40
===============================
ID : SBL (0x3)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 42
NO_UNITS : 5
===============================
ID : SBL2 (0x4)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 47
NO_UNITS : 5
===============================
ID : PARAM (0x15)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 52
NO_UNITS : 20
===============================
ID : KERNEL (0x6)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 72
NO_UNITS : 30
===============================
ID : RECOVERY (0x7)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 102
NO_UNITS : 30
===============================
ID : FACTORYFS (0x16)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 132
NO_UNITS : 1146
===============================
ID : DBDATAFS (0x17)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 1278
NO_UNITS : 536
===============================
ID : CACHE (0x18)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 1814
NO_UNITS : 140
===============================
ID : MODEM (0xb)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 1954
NO_UNITS : 50
===============================
loke_init: j4fs_open success..
load_lfs_parameters valid magic code and version.
reading nps status file is successfully!.
nps status=0x504d4f43
load_debug_level reading debug level from file successfully(0x574f4c44).
init_fuel_gauge: vcell = 3748mV, soc = 37
check_quick_start_condition- Voltage: 3748.75000, Linearized[36/51/66], Capacity: 37
init_fuel_gauge: vcell = 3748mV, soc = 37, rcomp = d01f
reading nps status file is successfully!.
nps status=0x504d4f43
PMIC_IRQ1 = 0x20
PMIC_IRQ2 = 0x0
PMIC_IRQ3 = 0x0
PMIC_IRQ4 = 0x0
PMIC_STATUS1 = 0x40
PMIC_STATUS2 = 0x0
get_debug_level current debug level is 0x574f4c44.
aries_process_platform: Debug Level Low
keypad_scan: key value ----------------->= 0x0
CONFIG_ARIES_REV:48 , CONFIG_ARIES_REV03:48
check_download: micorusb_status1 = 800, key_value = 0
aries_process_platform: final s1 booting mode = 0
DISPLAY_PATH_SEL[MDNIE 0x1]is on
MDNIE setting Init start!!
vsync interrupt is off
video interrupt is off
[fb0] turn on
MDNIE setting Init end!!

Autoboot (0 seconds) in progress, press any key to stop
get_debug_level current debug level is 0x574f4c44.
get_debug_level current debug level is 0x574f4c44.
boot_kernel: Debug Level Low
FOTA Check Bit
Read BML page=, NumPgs=
FOTA Check Bit (0xffffffff)
Load Partion idx = (6)
..............................done
Kernel read success from kernel partition no.6, idx.6.
setting param.serialnr=0x313511a1 0xff6300ec
setting param.board_rev=0x30
setting param.cmdline=console=ttySAC2,115200 loglevel=4

Starting kernel at 0x314dc000...

here's the Factory mode Boot ON-UART unpowered -this boots normally

1
-----------------------------------------------------------
Samsung Primitive Bootloader (PBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010
-----------------------------------------------------------

+n1stVPN 2688
+nPgsPerBlk 64
PBL found bootable SBL: Partition(3).

Set cpu clk. from 400MHz to 800MHz.
OM=0x9, device=OnenandMux(Audi)
IROM e-fused - Non Secure Boot Version.

-----------------------------------------------------------
Samsung Secondary Bootloader (SBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010

Board Name: ARIES REV 03
Build On: Feb 1 2011 10:54:21
-----------------------------------------------------------

Re_partition: magic code(0x0)
[PAM: ] ++FSR_PAM_Init
[PAM: ] OneNAND physical base address : 0xb0000000
[PAM: ] OneNAND virtual base address : 0xb0000000
[PAM: ] OneNAND nMID=0xec : nDID=0x50
[PAM: ] --FSR_PAM_Init
fsr_bml_load_partition: pi->nNumOfPartEntry = 12
partitions loading success
board partition information update.. source: 0x0
Now Read Images - ID : 1
.Done.
read 1 units.
==== PARTITION INFORMATION ====
ID : IBL+PBL (0x0)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 0
NO_UNITS : 1
===============================
ID : PIT (0x1)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 1
NO_UNITS : 1
===============================
ID : EFS (0x14)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 2
NO_UNITS : 40
===============================
ID : SBL (0x3)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 42
NO_UNITS : 5
===============================
ID : SBL2 (0x4)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 47
NO_UNITS : 5
===============================
ID : PARAM (0x15)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 52
NO_UNITS : 20
===============================
ID : KERNEL (0x6)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 72
NO_UNITS : 30
===============================
ID : RECOVERY (0x7)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 102
NO_UNITS : 30
===============================
ID : FACTORYFS (0x16)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 132
NO_UNITS : 1146
===============================
ID : DBDATAFS (0x17)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 1278
NO_UNITS : 536
===============================
ID : CACHE (0x18)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 1814
NO_UNITS : 140
===============================
ID : MODEM (0xb)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 1954
NO_UNITS : 50
===============================
loke_init: j4fs_open success..
load_lfs_parameters valid magic code and version.
reading nps status file is successfully!.
nps status=0x504d4f43
load_debug_level reading debug level from file successfully(0x574f4c44).
init_fuel_gauge: vcell = 3748mV, soc = 37
check_quick_start_condition- Voltage: 3748.75000, Linearized[36/51/66], Capacity: 37
init_fuel_gauge: vcell = 3748mV, soc = 37, rcomp = d01f
reading nps status file is successfully!.
nps status=0x504d4f43
PMIC_IRQ1 = 0x20
PMIC_IRQ2 = 0x0
PMIC_IRQ3 = 0x0
PMIC_IRQ4 = 0x0
PMIC_STATUS1 = 0x40
PMIC_STATUS2 = 0x0
get_debug_level current debug level is 0x574f4c44.
aries_process_platform: Debug Level Low
keypad_scan: key value ----------------->= 0x0
CONFIG_ARIES_REV:48 , CONFIG_ARIES_REV03:48
check_download: micorusb_status1 = 800, key_value = 0
aries_process_platform: final s1 booting mode = 0
DISPLAY_PATH_SEL[MDNIE 0x1]is on
MDNIE setting Init start!!
vsync interrupt is off
video interrupt is off
[fb0] turn on
MDNIE setting Init end!!

Autoboot (0 seconds) in progress, press any key to stop
get_debug_level current debug level is 0x574f4c44.
get_debug_level current debug level is 0x574f4c44.
boot_kernel: Debug Level Low
FOTA Check Bit
Read BML page=, NumPgs=
FOTA Check Bit (0xffffffff)
Load Partion idx = (6)
..............................done
Kernel read success from kernel partition no.6, idx.6.
setting param.serialnr=0x313511a1 0xff6300ec
setting param.board_rev=0x30
setting param.cmdline=console=ttySAC2,115200 loglevel=4

Starting kernel at 0x314dc000...

External power produces a looping primitive bootloader..

Here's the Factory mode boot ON uart powered - this boots to battery charging

1
-----------------------------------------------------------
Samsung Primitive Bootloader (PBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010
-----------------------------------------------------------

+n1stVPN 2688
+nPgsPerBlk 64
PBL found bootable SBL: Partition(3).
1
-----------------------------------------------------------
Samsung Primitive Bootloader (PBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010
-----------------------------------------------------------

+n1stVPN 2688
+nPgsPerBlk 64
PBL found bootable SBL: Partition(3).
1
-----------------------------------------------------------
Samsung Primitive Bootloader (PBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010
-----------------------------------------------------------

+n1stVPN 2688
+nPgsPerBlk 64
PBL found bootable SBL: Partition(3).

Set cpu clk. from 400MHz to 800MHz.
OM=0x9, device=OnenandMux(Audi)
IROM e-fused - Non Secure Boot Version.

-----------------------------------------------------------
Samsung Secondary Bootloader (SBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010

Board Name: ARIES REV 03
Build On: Feb 1 2011 10:54:21
-----------------------------------------------------------

Re_partition: magic code(0x0)
[PAM: ] ++FSR_PAM_Init
[PAM: ] OneNAND physical base address : 0xb0000000
[PAM: ] OneNAND virtual base address : 0xb0000000
[PAM: ] OneNAND nMID=0xec : nDID=0x50
[PAM: ] --FSR_PAM_Init
fsr_bml_load_partition: pi->nNumOfPartEntry = 12
partitions loading success
board partition information update.. source: 0x0
Now Read Images - ID : 1
.Done.
read 1 units.
==== PARTITION INFORMATION ====
ID : IBL+PBL (0x0)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 0
NO_UNITS : 1
===============================
ID : PIT (0x1)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 1
NO_UNITS : 1
===============================
ID : EFS (0x14)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 2
NO_UNITS : 40
===============================
ID : SBL (0x3)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 42
NO_UNITS : 5
===============================
ID : SBL2 (0x4)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 47
NO_UNITS : 5
===============================
ID : PARAM (0x15)
ATTR ��]�STL SLC (0x1101)
FIRST_UNIT : 52
NO_UNITS : 20
===============================
ID : KERNEL (0x6)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 72
NO_UNITS : 30
===============================
ID : RECOVERY (0x7)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 102
NO_UNITS : 30
===============================
ID : FACTORYFS (0x16)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 132
NO_UNITS : 1146
===============================
ID : DBDATAFS (0x17)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 1278
NO_UNITS : 536
===============================
ID : CACHE (0x18)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 1814
NO_UNITS : 140
===============================
ID : MODEM (0xb)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 1954
NO_UNITS : 50
===============================
loke_init: j4fs_open success..
load_lfs_parameters valid magic code and version.
reading nps status file is successfully!.
nps status=0x504d4f43
load_debug_level reading debug level from file successfully(0x574f4c44).
init_fuel_gauge: vcell = 3986mV, soc = 100
check_quick_start_condition- Voltage: 3986.25000, Linearized[73/88/100], Capacity: 100
init_fuel_gauge: vcell = 3986mV, soc = 100, rcomp = d01f
reading nps status file is successfully!.
nps status=0x504d4f43
PMIC_IRQ1 = 0x0
PMIC_IRQ2 = 0x0
PMIC_IRQ3 = 0x14
PMIC_IRQ4 = 0x0
PMIC_STATUS1 = 0x40
PMIC_STATUS2 = 0x2c
get_debug_level current debug level is 0x574f4c44.
aries_process_platform: Debug Level Low
keypad_scan: key value ----------------->= 0x0
CONFIG_ARIES_REV:48 , CONFIG_ARIES_REV03:48
check_download: micorusb_status1 = 400, key_value = 0
DISPLAY_PATH_SEL[MDNIE 0x1]is on
MDNIE setting Init start!!
vsync interrupt is off
video interrupt is off
[fb0] turn on
MDNIE setting Init end!!
set_boot_mode: boot mode = 1
aries_process_platform: final s1 booting mode = 1
aries_check_vf_status() ----- aver_vf_adc : 616

Autoboot (0 seconds) in progress, press any key to stop
get_debug_level current debug level is 0x574f4c44.
get_debug_level current debug level is 0x574f4c44.
boot_kernel: Debug Level Low
FOTA Check Bit
Read BML page=, NumPgs=
FOTA Check Bit (0xffffffff)
Load Partion idx = (6)
..............................done
Kernel read success from kernel partition no.6, idx.6.
setting param.serialnr=0x313511a1 0xff6300ec
setting param.board_rev=0x30
setting param.cmdline=console=ttySAC2,115200 loglevel=4

Starting kernel at 0x314dc000...

Here's the Factory mode boot OFF uart powered - this boots normally

1
-----------------------------------------------------------
Samsung Primitive Bootloader (PBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010
-----------------------------------------------------------

+n1stVPN 2688
+nPgsPerBlk 64
PBL found bootable SBL: Partition(3).
1
-----------------------------------------------------------
Samsung Primitive Bootloader (PBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010
-----------------------------------------------------------

+n1stVPN 2688
+nPgsPerBlk 64
PBL found bootable SBL: Partition(3).

Set cpu clk. from 400MHz to 800MHz.
OM=0x9, device=OnenandMux(Audi)
IROM e-fused - Non Secure Boot Version.

-----------------------------------------------------------
Samsung Secondary Bootloader (SBL) v3.0
Copyright (C) Samsung Electronics Co., Ltd. 2006-2010

Board Name: ARIES REV 03
Build On: Feb 1 2011 10:54:21
-----------------------------------------------------------

Re_partition: magic code(0x0)
[PAM: ] ++FSR_PAM_Init
[PAM: ] OneNAND physical base address : 0xb0000000
[PAM: ] OneNAND virtual base address : 0xb0000000
[PAM: ] OneNAND nMID=0xec : nDID=0x50
[PAM: ] --FSR_PAM_Init
fsr_bml_load_partition: pi->nNumOfPartEntry = 12
partitions loading success
board partition information update.. source: 0x0
Now Read Images - ID : 1
.Done.
read 1 units.
==== PARTITION INFORMATION ====
ID : IBL+PBL (0x0)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 0
NO_UNITS : 1
===============================
ID : PIT (0x1)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 1
NO_UNITS : 1
===============================
ID : EFS (0x14)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 2
NO_UNITS : 40
===============================
ID : SBL (0x3)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 42
NO_UNITS : 5
===============================
ID : SBL2 (0x4)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 47
NO_UNITS : 5
===============================
ID : PARAM (0x15)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 52
NO_UNITS : 20
===============================
ID : KERNEL (0x6)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 72
NO_UNITS : 30
===============================
ID : RECOVERY (0x7)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 102
NO_UNITS : 30
===============================
ID : FACTORYFS (0x16)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 132
NO_UNITS : 1146
===============================
ID : DBDATAFS (0x17)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 1278
NO_UNITS : 536
===============================
ID : CACHE (0x18)
ATTR : RW STL SLC (0x1101)
FIRST_UNIT : 1814
NO_UNITS : 140
===============================
ID : MODEM (0xb)
ATTR : RO SLC (0x1002)
FIRST_UNIT : 1954
NO_UNITS : 50
===============================
loke_init: j4fs_open success..
load_lfs_parameters valid magic code and version.
reading nps status file is successfully!.
nps status=0x504d4f43
load_debug_level reading debug level from file successfully(0x574f4c44).
init_fuel_gauge: vcell = 3851mV, soc = 102
EXT_I2C(0) -> No ACK
EXT_I2C(0) -> No ACK
EXT_I2C(0) -> No ACK
check_quick_start_condition_with_charger- Voltage: 3851.25000, Linearized[0/14/29], Capacity: 100
quick_start- quick start is executed!
init_fuel_gauge: vcell = 3855mV, soc = 55, rcomp = d01f
reading nps status file is successfully!.
nps status=0x504d4f43
PMIC_IRQ1 = 0x0
PMIC_IRQ2 = 0x0
PMIC_IRQ3 = 0x14
PMIC_IRQ4 = 0x0
PMIC_STATUS1 = 0x40
PMIC_STATUS2 = 0x2c
get_debug_level current debug level is 0x574f4c44.
aries_process_platform: Debug Level Low
keypad_scan: key value ----------------->= 0x0
CONFIG_ARIES_REV:48 , CONFIG_ARIES_REV03:48
check_download: micorusb_status1 = 800, key_value = 0
aries_process_platform: final s1 booting mode = 0
DISPLAY_PATH_SEL[MDNIE 0x1]is on
MDNIE setting Init start!!
vsync interrupt is off
video interrupt is off
[fb0] turn on
MDNIE setting Init end!!

Autoboot (0 seconds) in progress, press any key to stop
get_debug_level current debug level is 0x574f4c44.
get_debug_level current debug level is 0x574f4c44.
boot_kernel: Debug Level Low
FOTA Check Bit
Read BML page=, NumPgs=
FOTA Check Bit (0xffffffff)
Load Partion idx = (6)
..............................done
Kernel read success from kernel partition no.6, idx.6.
setting param.serialnr=0x313511a1 0xff6300ec
setting param.board_rev=0x30
setting param.cmdline=console=ttySAC2,115200 loglevel=4

Starting kernel at 0x314dc000...

Download mode works the other way. Boot On USB = phone goes into download mode. Boot off USB = phone goes into charging mode. I'm not really able to find any use for BOOT OFF USB... maybe that's special..