Figured it out - it's a bug in nspire_emu The thumb instruction "neg" ought to set the carry and overflow flags, but it doesn't. This messes up gcc's way of implementing the ! operator in thumb:

neg r1, r0 @ r1 = -r0, carry set if r0 == 0
adc r0, r1 @ r0 is now 1 if it was 0 before, 0 otherwise

Here is a patch that hopefully fixes it:

Index: cpu.c
===================================================================
--- cpu.c (revision 58)
+++ cpu.c (working copy)
@@ -861,7 +861,7 @@
  case 0x6: /* SBC */ res = *dst = add(*dst, ~src, arm.cpsr_c, true); break;
  case 0x7: /* ROR */ res = *dst = shift(3, *dst, src & 0xFF, true); break;
  case 0x8: /* TST */ res = *dst & src; break;
- case 0x9: /* NEG */ res = *dst = -src; break;
+ case 0x9: /* NEG */ res = *dst = add(0, ~src, 1, true); break;
  case 0xA: /* CMP */ res = add(*dst, ~src, 1, true); break;
  case 0xB: /* CMN */ res = add(*dst, src, 0, true); break;
  case 0xC: /* ORR */ res = *dst |= src; break;


I have just commited full support for the Touchpad key layout. Thanks bsl for the constants which helped me a lot, and Goplat for the original key map.

Programs need to be rebuilt with this version to handle properly the layout. Some programs which depends on Clickpad-specific keys will need slight changes (such as BlockDude which uses the Home key).

I'm interested to know how it works on real hardware, and if this update fixes the random reboot issue on Touchpad (it probably doesn't). The particles demo and BlockDude are good choices for a test.

Unfortunately gbc4nspire would need some reverse-engineering work to update it...

More details for developers:

Touchpad support is transparent, but makes the program slightly bigger (and slightly slower).
isKeyPressed will always return FALSE when scanning keys which does not exist on a model.
If needed, the variable BOOL is_touchpad can be used to determine the model.

ExtendeD: With a fresh compile, the "swi 80003b" call in crt0.o's cache_keypad_type is getting linked into ndless_resources.tns, and the installer's swi handler doesn't handle that.

apcalc: Does this mean your touchpad is working again? Good to see the problem wasn't permanent.

Wow nice updates guys!

Many of you will be much interested by Goplat's update of nspire_emu, which include compatibility of file transfers with OS 2.x.

willrandship: Not anymore since Ndless v1.7.

Goplat: Thanks, I have just fixed it, I am not sure how I didn't see it during my tests.

arrowkeys still don't work

With which program do you have problems?

Would you have better luck with this build?

Blockdude
and I already use version 348
I compared the "common.h"s they are identical.

Quote from: ExtendeD on December 23, 2010, 06:55:02 am

Would you have better luck with this build?

I couldn't use that build in a touchpad (if that's the same one I used, since the version name is the same)

Ndless as such works fine for me with this version