DraStic

I managed to set up the virtual filesystem entirely on my phone, so I thought I'd make a tutorial.

Prerequisites: root, busybox, a file explorer that can remount / and /system as rw, and terminal knowledge

1. cd into the DraStic data folder and create a blank file with dd:

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   dd if=/dev/zero of=drastic_dldi.img bs=1048576 count=128

   Replace 128 with how many MB you want your virtual filesystem to be.
2. Create the filesystem with mkfs.vfat. If mkfs.vfat doesn't exist, try mkdosfs or update busybox

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   mkfs.vfat ./drastic_dldi.img

3. Create a block device to mount the image on (only needs to be done once per reboot)

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   mknod /dev/block/loop250 b 7 250

   where 250 is an arbitrary unused device number
4. Link the filesystem to the new block device

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   losetup /dev/block/loop250 drastic_dldi.img

5. Create a blank directory to mount the image on

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   mkdir fatfolder

6. And finally, mount the image

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   mount -t vfat /dev/block/loop250 fatfolder

7. Add data files or whatever you want to the image
8. Unmount the image

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   umount fatfolder

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   losetup -d /dev/block/loop250

To add more files, repeat steps 4-8, or 3-8 after a reboot.


Mount instructions adapted from http://www.techpository.com/?page_id=1201

What is the benefit to this tutorial?

I'm assuming it makes the emulator run faster? My device is rooted and has all the pre-requisites to follow the tutorial.

Feel free to correct me on coding as I don't know much about it.

Kyousuke753 wrote:What is the benefit to this tutorial?

I'm assuming it makes the emulator run faster? My device is rooted and has all the pre-requisites to follow the tutorial.

Feel free to correct me on coding as I don't know much about it.

It's for homebrews that need dldi patching in order to work properly and other stuff like that. Like if you want to run a gb emu on drastic.

JeaneMaggie wrote:

Kyousuke753 wrote:What is the benefit to this tutorial?

I'm assuming it makes the emulator run faster? My device is rooted and has all the pre-requisites to follow the tutorial.

Feel free to correct me on coding as I don't know much about it.

It's for homebrews that need dldi patching in order to work properly and other stuff like that. Like if you want to run a gb emu on drastic.

Hmm all this trouble just to run a GBA emu on DraStic...Lucky I didn't do the tutorial yet.

not a gba game but homebrew. think of it like the psp minis for the ds.

Ahh that explains it thanks Jay-chan <3 I got the gist of it...I was about to follow the tutorial but I was afraid of mucking up and wrecking my smartphone but that is actually cool a universal emulator.

It'd be nice to have some other utility that creates dldi_image files for use with homebrew. I'd add this (and auto-patching the DLDI functions for R4 cards) to DraStic itself but there doesn't seem to be very much demand.

Exophase wrote:It'd be nice to have some other utility that creates dldi_image files for use with homebrew. I'd add this (and auto-patching the DLDI functions for R4 cards) to DraStic itself but there doesn't seem to be very much demand.

Does this mean DraStic is going to become a Universal emulator Exo-chan? if so is it only going to emulate GBA roms?

Kyousuke753 wrote:Does this mean DraStic is going to become a Universal emulator Exo-chan?

No, and what's a universal emulator? Something that emulates everything?

I've PM'd you Exo-chan please read it regarding this "Universal Emulator".