To use Comparison instruction and SR memory area- CPM2A

[Hanh 0]

Hi I got troubles with comparison instruction ( >=, CMP). I am using CPM2A, CX-programmer. I read the help but I did'nt master it clearly. Ex: the results will turn on bit in SR. Which SR ? I need some simple examples. Help me Thanks

[Guest anonymous]

Hello Hanh, The bits can be addressed in two ways... By their symbol names P_GT, P_EQ, and P_LT (Greater Than, Equal, and Less Than) - these can be seen within the Global Symbol table. The corresponding addresses (also visible within the Global Symbol table) are - 255.05, 255.06, and 255.07. It is a little misleading, in as much as you do not prefix these addresses with SR! Hope this helps. Edited 23 Jan 2008 by anonymous

[Hanh 0]

Thanks a lot. It s clearer now!!