LONGssss

Hello,
I decide to test 2.50 long variables with sd card application. I wrote my own functions for write and read sectors. I don't use FS, but i do sequenced .bin file with predefined size ( i am reading MBR, FAT, ROOT DIR, etc ) and after writing there ( by sectors) i am cutting the "tail". So far is not essential.
Now.
I am using pure asm interrupts, high and low.
I am using FSRx (POSTINCx) in low_int to fill my buffer.
I am using a flag to wait (in loop) buffer_ready from low_int.
I am using LONG variable in that loop to address the next sector :
Sector_Address = Sector_Address + 1
That line give mistakes sometime !!!!!!
So i am cutting the "tail" till the head ( MBR ) sometimes, you know what that mean ....:frown:

Can someone help me please!
How these LONG variables work, they use FSR or what ?

ps mcu is 26k20 with bootloader for 2620 .....

sorry, the problem is in my code. Had retfie instead bra restore in the middle of the interrupt, which is low, need restore ...
If any is interested in 2 interleaved 512B FIFOs capturing port value, i will post that part.

My favor soft till now is Circuit Maker, Picbasic and Proteus. I will buy Silver this week.
Picbasic is great for small to middle projects. In some cases i write procedure in Picbasic and then translate it to assembler.
Strange, eh? C is more close to mcu hardware, but there are drawbacks because of that too ...
Regards