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What I did!
Bunnie visited and gave us 2 chumby ones. one had no working wifi. the other one seemed to be OK. Using the OK one
Activated it. works OK
ssh in as root, and turn off the control panel (to free up some memory and cycles)
Then make the sshd 'permanent'
Download & install silvermoon dev environment. Chmod +x the shell script and run it. This will take a bit
Download the latest SDL tarball (we used 1.2.14)
./configure --enable-video-fbcon --disable-video-x11 --disable-dga --disable-esd --disable-oss --disable-pulseaudio --disable-joystick --disable-cdrom --without-x make mount -oremount,rw / make install
Ran the test programs. Nothing happened. Kinda disappointed. So now going to backtrack
Download chumby_quake to /mnt/storage and uncompress.
Make my own 'bitops.h' file from kludged together stuff
Go into the SDL directory and run
./configure --enable-alsa --enable-static --disable-oss --disable-esd --disable-pulseaudio --disable-video-x11 --enable-video-fbcon --disable-alsa-shared make make install
run tests. Nothing happens on the display but it -says- it found stuff. Disappointed. backtrack some more
Download chumby quake bins and stick on USB key. plug it in and run from command line. Had to use
to stop mouse complaints Audio is fine, pressing the top button makes the 'gun' fire. But no video. Disappointed. backtrack some more
bunnie suggests maybe the framebuffers are swapped (seems there are two) so tried
dd if=/dev/zero of=/dev/fb0
This wipes the screen (yay) so at least we know that the framebuffer is writable and is at /dev/fb0
Now try to run quake again. Notice that the top line is the only thing that displays (easier to see this if you wipe the screen)
Look at old SDL tests - graywin, for example, 'works' but only displays top line. So its not the quake code and is something either in the library/driver/kernel
OK so looking around some more, it looks like this has come up before - and the answer is the kernel is buggy (?)
So try to install new kernel with composite vid support (hey i might need it eventually) by running the script on the forums
Realise a little too late that this is going to cause the chumby to 'brick' due to the wifi driver having incompatibilities. eit.
Follow the USB update instructions to get the kernel back. Hey its a good thing to know anyways!
So finally I use my reading comprehension to realize that really whats broken is just needing to poke the chip to tell it which FB to use. Following this helpful post I run
wget http://files.chumby.com/hacks/switch_output chmod +x switch_output stop_control_panel ./switch_output -l switch_fb.sh 0
It runs! But it looks like some colorspace swappage is going on. I'll fix it later
Also tried the old SDL tests and they're working good now. yay.
The 'easiest' emulator to port by far is SIemu. Its written in straight-up C, well documented and uses SDL as an underpinning.
OK much success. Now to fix it so audio works. SDL doesnt seem to know about audio device - perhaps we need to install ALSA lib first?
Grab the source, try to build
chumby:/mnt/storage/stella/stella-3.0# ./configure Running Stella configure... ./configure: line 341: printf: not found g++ ./configure: line 363: printf: not found 4.3.3, ok ./configure: line 493: printf: not found linux-gnu ./configure: line 504: printf: not found none found!
OK, grab an updated busybox and install it