[Hardware Hacking General] AdamOutler:
Alright, big news.. UART RX and TX have been located.

I've posted some human-readble content here: https://plus.google.com/104711040110222472212/posts/YLA8pFKpm2k and here: https://plus.google.com/104711040110222472212/posts/V5gYw7Vuih .

There are

OK.. So, here's the full output:

PMIC rev = PASS2(4)
CHECK PWROFFSRC = 0x00
CHECK RTC PWROFFSRC = 0x01
[s5m8767] update LDO2 onoff[1]
[s5m8767] update LDO4 onoff[1]
[s5m8767] update LDO5 onoff[0]
[s5m8767] update LDO6 onoff[1]
[s5m8767] update LDO7 onoff[1]
[s5m8767] update LDO8 onoff[1]
[s5m8767] update LDO9 vol[1800]
[s5m8767] update LDO10 onoff[1]
[s5m8767] update LDO11 vol[1950], onoff[1]
[s5m8767] update LDO12 onoff[1]
[s5m8767] update LDO13 onoff[0]
[s5m8767] update LDO14 vol[1950], onoff[1]
[s5m8767] update LDO15 onoff[1]
[s5m8767] update LDO16 onoff[1]
[s5m8767] update LDO19 vol[1800], onoff[1]
[s5m8767] update LDO20 vol[3300]
[s5m8767] update LDO21 vol[3300]
[s5m8767] update LDO22 vol[2800]
[s5m8767] update LDO27 vol[1500]
cardtype: 0x00000007
SB_MMC_HS_52MHZ_1_8V_3V_IO
mmc->card_caps: 0x00000311
mmc->host_caps: 0x00000311
mmc_initialize: mmc->capacity = 15269888

Samsung S-Boot 4.0-413474 for EK-GC100_EUR_XX (Oct 27 2012 - 03:30:02)

EXYNOS4412(EVT 1.1) / 1023MB / 7456MB / Rev 11 / GC100XXALJF /(PKG_ID 0x19)

initialize_ddi_data: usable! (11:0x0)
PARAM ENV VERSION: v1.0..
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
EXT_I2C(2) -> No ACK
init_fuelgauge: fuelgauge is not powered state
set_charger_current: chg curr(14), in curr(23)
set_charger_state: buck(1), chg(1), reg(0x05)
init_fuelgauge: charger on, state(0)
init_fuelgauge: cnt#1: charger(3), vcell(3964), fg_pwr(1)
init_fuelgauge: POR status
fuelgauge_por: POR start: vcell(3964), vfocv(3963), soc(71)
fuelgauge_por: update SDI GC1 parameter
fuelgauge_por: RCOMP(0x008f), TEMPCO(0x4015)
fuelgauge_por: POR finish: vcell(3987), vfocv(3936), soc(76)
init_fuelgauge: disable charging for soc-cal
set_charger_current: chg curr(14), in curr(23)
set_charger_state: buck(1), chg(0), reg(0x04)
init_fuelgauge: vcell comp. = 3913
get_table_soc: vcell(3913) is caculated to t-soc(64.544)
init_fuelgauge: start: vcell(3913), vfocv(3941), soc(76), table soc(64)
init_fuelgauge: finish: vcell(3913), vfocv(3941), soc(76), table soc(64)
init_microusb_ic: MUIC: CONTROL1:0x09
init_microusb_ic: MUIC: CONTROL1:0x09
init_microusb_ic: MUIC: CONTROL2:0x3b
init_microusb_ic: MUIC: CONTROL2:0x3b
====================
s5m8767 pmic register
====================
ID = 0x05
ONSRC = 0x04
STATUS1 = 0x00
STATUS2 = 0x10
STATUS3 = 0x07
IRQ1 = 0x00
IRQ2 = 0x3a
IRQ3 = 0x00
PWROFFSRC = 0x00
PMIC_RTC_WTSR_SMPL_REG = 0x80
S5M8767_REG_BUCHG = 0x6f

s5p_check_keypad: 0x0
s5p_check_reboot_mode: INFORM3 = 0 ... skip
s5p_check_upload: MAGIC(0xc0c0c0c0), RST_STAT(0x10000)
microusb_get_attached_device: STATUS1:0x3f, 2:0x41
s5p_check_download: 0
microusb_get_attached_device: STATUS1:0x3f, 2:0x41
set_charger_current: chg curr(14), in curr(23)
set_charger_state: buck(0), chg(0), reg(0x00)
set_charger_current: chg curr(14), in curr(23)
set_charger_state: buck(1), chg(0), reg(0x04)
check_pm_status: battery ok, charger boot, waiting 500ms and check again
microusb_get_attached_device: STATUS1:0x3f, 2:0x41
check_pm_status: charger is ok, LPM boot
AST_CHARGING..
cmu_div:5, div:2, src_clk:800000000, pixel_clk:66765600
s6d6aa1_write :: retry: 1
s6d6aa1_write :: 0x11

autoboot aborted..
S-BOOT #
S-BOOT #
S-BOOT #
S-BOOT #
S-BOOT #
S-BOOT #

You have to hold ENTER to get the S-BOOT # prompt.

I've reached the limit so I will have to start another post for all the UART help options.