[General Topics] snowlily:
Heya guys!

So I've been busy making a TWRP recovery image for my unlocked chinese tablet (a Deejoy q728) that I bought from Amazon. It's a reaaaaally generic one with literally no firmware available over the entirety of the webs(yes I followed every tutorial you could think of that explains how to find firmware, believe me *sigh*).

Now I've gotten TWRP 2.3.6 to actually boot. I used the recovery img from another tablet with almost the same hardware(Concord HS or something) as a base and brought the necessary files into a TWRP 2.6.3 for the AllWinner A23 SoC. with Android Image Kitchen. The steps I took are from this post on DroidWin. It boots but I am encountering the following(major) problems.

1. Even though it displays in landscape, the touch screen seems to think it's in portrait.

2. Partitions just can't be found whatsoever. I think this might have to do with the fact that I don't know too much about fstab.

3. Adbd doesn't work.

By the by, I also edited the fstab files so that they contain the specific partition info of my tablet, not the Concord, as the Concord has several partitions that simply don't exist on mine. Code for twrp.fstab and recovery.fstab down below:

twrp.fstab:
/boot emmc /dev/block/by-name/boot
/recovery emmc /dev/block/by-name/recovery
/system ext4 /dev/block/by-name/system
/data ext4 /dev/block/by-name/UDISK flags=encryptable=/dev/block/by-name/metadata
/cache ext4 /dev/block/by-name/cache
/misc emmc /dev/block/by-name/misc
/external_sd vfat /dev/block/mmcblk1p1 flags=removable;storage;display="SDCARD"
/usb-otg auto /dev/block/sda1 flags=removable;storage;display="USB-OTG"

recovery.fstab:
# Android fstab file.
# The filesystem that contains the filesystem checker binary (typically /system) cannot
# specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
#<src> <mnt_point> <type> <mnt_flags and options> <fs_mgr_flags>
/dev/block/by-name/system /system ext4 ro,barrier=1 wait,first_stage_mount,logical,avb=vbmeta,avb_keys=/avb/q-gsi.avbpubkey:/avb/r-gsi.avbpubkey:/avb/s-gsi.avbpubkey
/dev/block/by-name/vendor /vendor ext4 ro,barrier=1 wait,first_stage_mount,logical
#product /product ext4 ro,barrier=1 wait,first_stage_mount,logical
/dev/block/by-name/UDISK /data ext4 noatime,nosuid,nodev,discard wait,check,formattable,fileencryption=adiantum,quota,reservedsize=33554432
/dev/block/by-name/cache /cache ext4 noatime,nosuid,nodev,barrier=1,data=ordered,nomblk_io_submit,noauto_da_alloc,errors=panic wait,check,formattable
/dev/block/by-name/metadata /metadata ext4 nodev,noatime,nosuid,errors=panic wait,first_stage_mount,formattable
/dev/block/by-name/boot /boot emmc defaults defaults
/dev/block/by-name/recovery /recovery emmc defaults defaults
/dev/block/by-name/misc /misc emmc defaults defaults
#/dev/block/by-name/super /super emmc defaults defaults
/dev/block/by-name/frp /persistent emmc defaults defaults
/dev/block/zram0 none swap defaults zramsize=75%
/devices/platform/soc/sdc0/mmc_host/mmc* auto auto defaults voldmanaged=extsd:auto,encryptable=footer
/devices/platform/soc/usbc0/usb* auto auto defaults voldmanaged=usb:auto,encryptable=footer
/devices/platform/soc/5101000.ehci0-controller/usb* auto auto defaults voldmanaged=usb:auto,encryptable=footer
/devices/platform/soc/5200000.ehci1-controller/usb* auto auto defaults voldmanaged=usb:auto,encryptable=footer
/devices/platform/soc/5101000.ohci0-controller/usb* auto auto defaults voldmanaged=usb:auto,encryptable=footer
/devices/platform/soc/5200000.ohci1-controller/usb* auto auto defaults voldmanaged=usb:auto,encryptable=footer
/external_sd vfat /dev/block/mmcblk1p1 flags=removable;storage;display="SDCARD"
/usb-otg auto /dev/block/sda1 flags=removable;storage;display="USB-OTG"
# add for recovery
none /sdcard emmc defaults defaults

Edit: The main reason I really want this to end up working is because there are a ton of cheap allwinner a50 tablets and most of them(at least mine) are bootloader unlockable. Add Magisk to these babies and voila! Ya got a cheap device that you can theme to your hearts content. Toying around with tech has always been my thing haha.

So if anyone has any tips for me to get a sorta head start on this, I would really appreciate it!

Sincerely,

Snow