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not able to do code banking in monitor mode

Aswath Narayana Yellodu Sripuram over 24 years ago

Problem: Unable to execute the program with banking.

The operating system i am using is windows 95,
my target hardware has the following settings
a)common area - 1400 to 7fff (VNM)
b)banked area - 8000 to fdff (vnm)
c)no of banks - 15 (all are vnm)
d)monitor program located at 0000-13ff
in the common area (reading using psen signal)

In the program I have used the following settings in the mon_bank.a51

$NOCOND DEBUGPUBLICS
?B_NBANKS EQU 16
?B_MODE EQU 0
?B_BANKSTART EQU 08000H
?B_BANKEND EQU 0FdFFH
?B_COMMON EQU 0FFH
?B_XRAM EQU 0FFH
?B_MON_DATA_BANK EQU 11
IF ?B_MODE = 0;
?B_PORT EQU P1
?B_FIRSTBIT EQU 0
ENDIF;
And rest of the settings are default.

Whenever I am loading the program to target board (we are using keil monitor 51 in debug settings)using uv2 and watch port p1, it always shows bank11 (?B_MON_DATA_BANK setting)
(if i change the above setting to bank07 P1 shows always bank7)

When I execute the program in the stepinto mode, the program shows as if the program is swithcing the banks, but when I watch the port p1, P1 shows always bank 11

The above program works properly in debug simulator mode and I am able to see the port P1 changing as per the banks selected

I have created the mon51.hex file using
the following command:

install 0 14 0 BANK

i.e., 256 bytes for monitor program is from 1400 to 14ff, our program starts from 3800h (i.e., code start is from 3800h which is set in l51_locate and xdata is set 1500H)

I am setting the l51_bank.a51 with the following settings

$NOMOD51
$NOCOND
;************************ Configuration Section *******************************
?B_NBANKS EQU 16

?B_MODE EQU 0
?B_RTX EQU 0
?B_VAR_BANKING EQU 0
IF ?B_VAR_BANKING <> 0
?B_COMMON_XRAM EQU 0
?B_INTR_ACCESS EQU 0
ENDIF
IF ?B_MODE = 0
P1 DATA 90H
?B_PORT EQU P1
?B_FIRSTBIT EQU 3
ENDIF

And rest of the settings are default.

When I run this program using simulator and when I watch ports under the menu Peripherals it shows 4 ports of 8 bit width and when I run the same program using Monitor51 mode and when I watch ports under the menu Peripherals it shows 8 ports of 8 bit width.

Aswath