search

Trinity-11 / FoenixIDE

Development and Debugging Suite for the C256 Foenix Family of Computers
GNU General Public License v3.0
48 stars 14 forks source link

TAX, TAY, TSX and others should set N and Z flags #14

Closed aniou closed 4 years ago

aniou commented 4 years ago

According to manual and available docs: http://www.6502.org/tutorials/65c816opcodes.html#6.10.1 TAX, TAY, TSX, TXA, TXY, TYA and TYX should set NZ flags (depending of X/M flags and direction of transfer).

Lack of that prevents my port of of816 Forth, fresh hex file here from working - after cursory correction of TAY behavior all problems were gone.

Unfortunately, I don't have a production-ready code at this moment, so no patch provided.

dtremblay commented 4 years ago

I'm also surprised to find that the emulator was not setting any of the CPU flags.

I've added a unit test to cover the example provided in the the URL you provided.

This is included in release-0.5.2.2 of the IDE.