ldo/ti5x_android — pull request #6 by TurboGit (2014-05-27 16:55:19+00:00)
Title: Implement HIR support.

The HIR instruction are officially undocumented but are well known and
described and used in many programs. The HIR instructions are just dealing
with the 8 stack internal registers.

The operations are:

HIR CN : 82 CN

Where N is in range 0 .. 7 and correspond to the 8 internal registers with
0 being the currently displayed value (X).

And C is:
0 : STO : X -> Stack (N)
1 : RCL : Stack (N) -> X
3 : ADD : Stack (N) += X
4 : MUL : Stack (N) *= X
5 : SUB : Stack (N) -= X
6 : DIV : Stack (N) /= X

This patch plus the previous (printer fix) enable me to play an old game in the emulator.

Let me know if you want me to add a documentation into the help for this.