At 01:29 PM 5/26/01 +1200, Seth Fischer wrote:
>When I compile this program (I cut it from someone elses larger program
>to get me going):
>
>LIST P=16F84, R=DEC
>Start           BSF     STATUS,RP0      ;Select bank 1
>                 CLRF    TRISB           ;Select Output on all PORTB bits
>                 BCF     STATUS,RP0      ;Select bank 0
>                 CLRF    PORTB           ;Turn off all LEDs
>                 BSF     PORTB,0         ;Turn on LED0
>
>                 END
>
>I get this message:
>
>Message[302] C:\SETH\~PICPR~1\LEDRUN~1\LED.ASM 29 : Register in operand
>not in bank 0.  Ensure that bank bits are correct.
>
>What does it mean? And, what is a bank? (anything to do with pages?)


Banks and pages are that which you do not have in the atmel AVR.

In the pic, the registers and memory are carved into two or four banks.
While you are pointing at one bank, you cannot access anything in the other
bank.

Pages are basically the same thing, but in EPROM. (program memory)

They are, IMHO, a giant pain in the ass.

Pic:

bsf status,rp0
bsf trisb,1
bcf status,rp0
btfss portb,0
Total, 16 xtal cycles

(And beware, there are problems with BCF and BSF when used with port
registers.)

The same thing is four cycles on the AVR.

Later, we'll talk about why on the pic, everything has to funnel through
the W register, and in the AVR, you can use almost every register, for
everything.


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