[E3-hacking] Config / content filesystem
Nick Griffin
span1922 at live.com
Wed Apr 24 11:48:36 BST 2019
This is the code I made for it… so if anyone wants to try it on theres,you can’t damge the E3 doing it,if it don’t work it will not get past the PBL line,lucky they put PBL on the nor flash you can’t brick it..😊 if it don’t work just when using the Pbltool put -n in the line to stop it from “Probbing” and “handshaking” because it will not find PBL V4.9 otherwise.
And say “Probbing” forever.. 😊 and not find anything.
You have to put the script on the USB Stick and run it from it on the E3 for it to work.
so .. cd /media/sda1/
ams-delta-of-install
The code…
-----------------------------------------------------------------------------------------
#!/bin/sh
if (! grep -q /dev/sda1 /proc/mounts); then
echo "No install media mounted; couldn't find /dev/sda in /proc/mounts"
exit 1;
fi
echo
echo "This process will completely restore your E3's NAND."
echo This will try and restore The Amstrad firmware on the device. Are you
echo -n "sure you wish to continue? [y/N]: "
read i
if [ ! "x$i" = "xy" -a ! "x$i" = "xY" ]; then
echo
echo Aborting.
exit 1
fi
echo
echo Starting restore.. This might take a while...
if [ -e /media/sda1/e3-nand.0 ]; then
echo Found e3-nand.0
echo " Erasing /dev/mtd0"
flash_erase /dev/mtd0 0 224
echo " Writing e3-nand.0 4mb to /dev/mtd0"
nandwrite /dev/mtd0 /media/sda1/e3-nand.0
fi
if [ -e /media/sda1/e3-nand.1 ]; then
echo Found e3-nand.1
echo " Erasing /dev/mtd1"
flash_erase /dev/mtd0 0 16
echo " Writing e3-nand-backup.1 264kb to /dev/mtd1"
nandwrite /dev/mtd1 /media/sda1/e3-nand.1
fi
if [ -e /media/sda1/e3-nand.2 ]; then
echo Found e3-nand.2
echo " Erasing /dev/mtd2"
flash_erase /dev/mtd0 0 16
echo " Writing e3-nand-backup.2 264kb to /dev/mtd2"
nandwrite /dev/mtd2 /media/sda1/e3-nand.2
fi
if [ -e /media/sda1/e3-nand.3 ]; then
echo Found e3-nand.3
echo " Erasing /dev/mtd3"
flash_erase /dev/mtd0 0 16
echo " Writing e3-nand-backup.3 264kb to /dev/mtd3"
nandwrite /dev/mtd3 /media/sda1/e3-nand.3
fi
if [ -e /media/sda1/e3-nand.4 ]; then
echo Found e3-nand.4
echo " Erasing /dev/mtd4"
flash_erase /dev/mtd0 0 1728
echo " Writing e3-nand-backup.4 32 mb to /dev/mtd4"
nandwrite /dev/mtd4 /media/sda1/e3-nand.4
fi
if [ -e /media/sda1/e3-nand.5 ]; then
echo Found e3-nand.5
echo " Erasing /dev/mtd5"
flash_erase /dev/mtd0 0 48
echo " Writing e3-nand-backup.5 792kb to /dev/mtd5"
nandwrite /dev/mtd5 /media/sda1/e3-nand.5
fi
echo "Finished restoring the Amstrad E3 Firmware,"
echo "Type Reboot or unplug E3 to see if the Amstrad E3 Splash Screen”
echo "comes up (Fingers Crossed) If not just reinstall E3 Linux with the"
echo "pbltool with the -n in the line to stop Handshaking otherwise it will"
echo "not find PBL V4.9 Build:1311 bootloader."
Spanner..
http://amstrad-e3-hacking.freeforums.net
From: Nick Griffin<mailto:span1922 at live.com>
Sent: Wednesday, 24 April 2019 11:14
To: Discussion of the Amstrad E3 emailer hardware/software<mailto:e3-hacking at earth.li>
Thanks btw Ralph.. 😊
Spanner..
http://amstrad-e3-hacking.freeforums.net
From: David Given<mailto:dg at cowlark.com>
Sent: Wednesday, 24 April 2019 10:50
To: Discussion of the Amstrad E3 emailer hardware/software<mailto:e3-hacking at earth.li>
The E3 is based on an ARM reference design, isn't it? What's the feasibility of emulating one?
On Wed, 24 Apr 2019 at 11:46, Ralph Corderoy <ralph at inputplus.co.uk<mailto:ralph at inputplus.co.uk>> wrote:
Hi Nick,
> > That should be possible as you have the files, now without their 16
> > bytes per 512 bytes overhead. You need to work out how many blocks
> > to erase based on the size of each file you're trying to put back.
> > IIRC I pointed out a block is the unit of erasure and it's 16 KiB.
>
> So e3-nand.0 is 3584 KB so how many blocks go into it…? so how many
> times dose 16KB going in to 3584KB…?? I don’t know..?? I can’t divide.
> Iam a bit ok on Add not brilliant at Times but can’t do Divide.
Having stripped the excess OOB data, I have these sizes for each file in
bytes.
3670016 e3-nand-backup.0
262144 e3-nand-backup.1
262144 e3-nand-backup.2
262144 e3-nand-backup.3
28311552 e3-nand-backup.4
786432 e3-nand-backup.5
You're right, 3,670,016 B is 3,584 KiB because
3,670,016 / 1,024 = 3,584
so 1,024 goes into 3,670,016 exactly 3,584 times.
But the size of the erase block is 16 KiB which is
16 * 1,024 = 16,384
so we want to know how many times 16,384 goes into 3,670,016.
3,670,016 / 16,384 = 224
224 is what you worked out in your other email.
Taking those six sizes above and repeating the same sum gives
3,670,016 / 16,384 = 224
262,144 / 16,384 = 16
262,144 / 16,384 = 16
262,144 / 16,384 = 16
28,311,552 / 16,384 = 1,728
786,432 / 16,384 = 48
Now I haven't been carefully following along how to extract
e3-nand-backup.* in the first place, and how to write them back.
I'm aware there's a script involved and a command where one of the
parameters is the number of 16 KiB blocks to erase. Hopefully, plugging
in those numbers above for each of the matching areas will work, but
it's your responsibility whether to go ahead as you're the one actually
doing all this; I've just been sitting at a keyboard. :-)
--
Cheers, Ralph.
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