Arm Akimbo SDLMAME

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Re: Arm Akimbo SDLMAME R. Belmont #57344 12/27/09 03:40 PM
Joined: Jul 2006 Posts: 87 L ldesnogu Member
ldesnogu Member L Joined: Jul 2006 Posts: 87	I got the SDK installed using this page: http://www.niemueller.de/blog/id/234. It seems to work, though I don't know what to do next. What I probably need is some trivial example to compile. More time to spend reading doc I guess The last time I tried to install Maemo on CentOS 5.x, I got a coredump from Xephyr. It looks like this was fixed.

Re: Arm Akimbo SDLMAME ldesnogu #57446 01/01/10 09:24 AM
Joined: Jul 2006 Posts: 87 L ldesnogu Member
ldesnogu Member L Joined: Jul 2006 Posts: 87	I could reproduce Flandry Illegal instruction error. gdb tells me the error happens @0x0072f37c Code (gdb) disassemble 0x72f370 0x72f37f Dump of assembler code from 0x72f370 to 0x72f37f: 0x0072f370 <floor+7473708>: mov r0, r4 0x0072f374 <floor+7473712>: bl 0x6fcaec <floor+7266728> 0x0072f378 <floor+7473716>: vldr s15, [r6, #52] 0x0072f37c <floor+7473720>: vcmp.f32 s15, #0.0 (gdb) info registers r6 r6 0x500b237 83931703 Looks bad, 0x0072f378 is doing an unaligned load... But the kernel is configured to fix that up, and the memory @r6 is accessible. Also as far as I know the vcmp instruction is valid. To sum up I don't know what the issue is I'll rebuild with symbols. EDIT: I forgot to say that the executable runs fine on the QEMU ARM provided with the SDK. No big surprise, QEMU isn't that accurate EDIT 2: I found the issue. Even though the kernel should fixup alignment issues, it fails to recognize the vldr instruction as a load instruction. So MAME will have to be fixed not to generate such loads For info the offending line is 1029 in sdlmame0136/src/emu/video.c. Last edited by ldesnogu; 01/01/10 10:37 AM.

Re: Arm Akimbo SDLMAME

ldesnogu #57450 01/01/10 11:19 AM

Joined: Jul 2006

Posts: 87

ldesnogu

Member

ldesnogu

Member

Joined: Jul 2006

Posts: 87

The problem seems to be solved.

The issue is that the inline_config field of _device_config is starting with a tag which length isn't necessarily a multiple of 4 and hence the data used isn't aligned.

Something like this:

Code

--- src/emu/devintrf.c~	2010-01-01 07:20:48.000000000 +0100
+++ src/emu/devintrf.c	2010-01-01 12:17:08.771259165 +0100
@@ -134,6 +134,7 @@
 	device_config *device, *tempdevice;
 	tagmap_error tmerr;
 	UINT32 configlen;
+	UINT32 additionalalign;
 
 	assert(devlist != NULL);
 	assert(devlist->map != NULL);
@@ -146,8 +147,11 @@
 	/* get the size of the inline config */
 	configlen = (UINT32)devtype_get_info_int(type, DEVINFO_INT_INLINE_CONFIG_BYTES);
 
+	/* add some room to make sure the device structure is aligned to a multiple of 4 */
+	additionalalign = (4 - (strlen(tag) + 1)) & 3;
+
 	/* allocate a new device */
-	device = (device_config *)alloc_array_or_die(UINT8, sizeof(*device) + strlen(tag) + configlen);
+	device = (device_config *)alloc_array_or_die(UINT8, sizeof(*device) + strlen(tag) + configlen + additionalalign);
 
 	/* add to the map */
 	tmerr = tagmap_add_unique_hash(devlist->map, tag, device, FALSE);
@@ -180,7 +184,7 @@
 		device->clock = device->owner->clock * ((device->clock >> 12) & 0xfff) / ((device->clock >> 0) & 0xfff);
 	}
 	device->static_config = NULL;
-	device->inline_config = (configlen == 0) ? NULL : (device->tag + strlen(tag) + 1);
+	device->inline_config = (configlen == 0) ? NULL : (device->tag + strlen(tag) + 1 + additionalalign);
 
 	/* ensure live fields are all cleared */
 	device->machine = NULL;

Now I need to understand why SDL doesn't accept the keyboard return key, but given how lazy^Wbusy I am, I will perhaps leave that to someone else

Re: Arm Akimbo SDLMAME ldesnogu #57473 01/02/10 06:51 AM
Joined: Dec 2009 Posts: 24 F Flandry Member
Flandry Member F Joined: Dec 2009 Posts: 24	Thanks for tracking that down. I haven't used gdb for years and then only briefly and was having trouble getting it working, or rather getting an armel binary with symbols. Anyway plenty more time to play with that ahead i think... The keymap issue was easy to resolve. I get Average speed: 34.46% (84 seconds) in Ghosts and Goblins, autosave worked. Average speed: 26.54% (77 seconds) in SF2 Sound is not really good but it's a start. Unfortunately the Fn key doesn't work as a key map but otherwise the control options seem pretty complete. I'll grab the new version and put up the patched package.

Re: Arm Akimbo SDLMAME Flandry #57686 01/07/10 08:11 PM
Joined: Mar 2001 Posts: 17,258 Likes: 267 USA R R. Belmont Very Senior Member
R. Belmont Very Senior Member R Joined: Mar 2001 Posts: 17,258 Likes: 267 USA	Pandora's just been delayed again, but I'll be looking at ARM SDLMAME either way hopefully soonish since Palm just announced a native C/C++ SDK with SDL (!) and OpenGL for WebOS phones, and I have a Pre. Last edited by R. Belmont; 01/07/10 08:27 PM.

Re: Arm Akimbo SDLMAME R. Belmont #57693 01/07/10 10:27 PM
Joined: Jul 2006 Posts: 87 L ldesnogu Member
ldesnogu Member L Joined: Jul 2006 Posts: 87	OMAP3 has been obsoleted by Tegra2 :-)

Re: Arm Akimbo SDLMAME ldesnogu #57694 01/07/10 10:37 PM
Joined: Mar 2001 Posts: 17,258 Likes: 267 USA R R. Belmont Very Senior Member
R. Belmont Very Senior Member R Joined: Mar 2001 Posts: 17,258 Likes: 267 USA	Sure, if you can figure out some way to get a shell prompt in an Audi ;-)

Re: Arm Akimbo SDLMAME R. Belmont #57749 01/08/10 10:51 PM
Joined: Jul 2006 Posts: 87 L ldesnogu Member
ldesnogu Member L Joined: Jul 2006 Posts: 87	No need for that BTW nVidia T2 dev board is available and costs $400. Last edited by ldesnogu; 01/08/10 10:53 PM.

Re: Arm Akimbo SDLMAME ldesnogu #57750 01/08/10 11:04 PM
Joined: Mar 2001 Posts: 17,258 Likes: 267 USA R R. Belmont Very Senior Member
R. Belmont Very Senior Member R Joined: Mar 2001 Posts: 17,258 Likes: 267 USA	Can random people order it? Otherwise I'll wait for the inevitable OMAP4 version of the BeagleBoard =)

Re: Arm Akimbo SDLMAME R. Belmont #57751 01/08/10 11:23 PM
Joined: Jul 2006 Posts: 87 L ldesnogu Member
ldesnogu Member L Joined: Jul 2006 Posts: 87	As long as you live in the US or Canada you can order now. You need a project too and probably a company name. http://tegradeveloper.nvidia.com/te...-developer-kit-and-how-much-does-it-cost Quote Currently, you must apply for and be accepted as a registered NVIDIA developer. While we cannot guarantee that every application will be accepted, applications that thoroughly answer the questions in the registered developer application have a higher rate of acceptance. Applications with misleading or false information will be removed with no further review. If the questions require that you breach confidentiality, please contact tegradev@nvidia.com and request an NVIDIA representative contact your company as soon as possible. The Tegra developer kits are currently priced at $399 and are currently only available in the US and Canada. We are working on making the developer kits internationally available where export laws allow, but we have no specific date yet. EDIT: BTW the BeagleBoard OMAP4 will exist for sure, as I was told by the guy behind the project. Last edited by ldesnogu; 01/08/10 11:24 PM.

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