Problem with 16Ff648a

[aerostar]

This program tries to clear the same memory without the clear statement.
It doesn't do banks 0 or 1 because they were already checked with the 628 program loaded in the 648.

DEFINE OSC 20 

Idx     VAR BYTE
B2RAM   VAR BYTE[80] BANK2
COUNTER VAR BYTE

FOR COUNTER = 0 TO 10 ' confirms beginning of program
    LOW PORTA.0
    PAUSE 250
    HIGH PORTA.0
    PAUSE 250
NEXT

TEST:

FOR Idx = 0 TO 79
    B2RAM(Idx) = 0
NEXT Idx

LOW PORTA.0   ' turn LED on to indicated completed
              ' may need HIGH don't know which way the LED is.
STOP

Probably nonsense, but I'm still curious.
<br>

Hi Darrel

Thank you very much for the code, it works with no problem, I then modified it to check that after writing 0 to the location it was read back to see if it had been written correctly, answer is yes. I then made it keep doing, and again no failures.

Something is very strange. I have ordered some more 648As from another supplier, they may arrive tomorrow


I have just been looking through the listing and see that PB shows the following

16 =0020 RAM_START EQU 00020h
17 =01EF RAM_END EQU 001EFh
18 =0003 RAM_BANKS EQU 00003h
19 =0020 BANK0_START EQU 00020h
20 =007F BANK0_END EQU 0007Fh
21 =00A0 BANK1_START EQU 000A0h
22 =00EF BANK1_END EQU 000EFh
23 =0120 BANK2_START EQU 00120h
24 =01EF BANK2_END EQU 001EFh
25 =2100 EEPROM_START EQU 02100h
26 =21FF EEPROM_END EQU 021FFh

page 17 of my data sheet shows that bank 2 ends at 16FH not as it says above, 1EFH , could this be the problem or am I missing the obvious ?

What do you think ?

edit.

I have just changed the bank 2 end location to 16FH from 1EFH in the 648a.bas file and recompiled using the program in post 14, with the clear in position.......it works perfectly... so do you think I have found the problem ?