Trouble with INDEX instruction | Cypress Semiconductor
Trouble with INDEX instruction
I´m having troubles accessing a table with INDEX instruction.
The device i´m using is CY8C29466.
The table is 128 entries long and is feeding a 16 bit timer.
Previously i had a precomputed table divided in MSB and LSB working just fine. Then i decided trying a table computed at compile time,
;period+1 already in A
DW (Main_Freq/256)/x ;128 times
The code above is working partially, when i reach a value of 93 or 0x5D in the table it jumps to nowhere and never get back!
I have some cuestions on this:
1. What is wrong in the code above, of course.
2. Why in the life i need to put "asl A" to acces the table? If i don´t use ASL i get messed values.
Thanks in advance