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Which bytes of XDATA will be used when switching the code bank?

liao qinglong

I used the file: L51_BANK.A51,
and configurated it as following:

;************************ Configuration Section *******************************
?B_NBANKS       EQU  8    ; Define maximum Number of Banks                    *
;                         ; following values are allowed: 2, 4, 8, 16, 32, 64 *
;                         ; for BL51 the maximum value for ?B_BANKS is 32     *
;                         ; for LX51 the maximum value for ?B_BANKS is 64     *
;                                                                             *
?B_MODE         EQU  1    ; 0 for Bank-Switching via 8051 Port                *
;                         ; 1 for Bank-Switching via XDATA Port               *
;                         ; 4 for user-provided bank switch code              *
;                                                                             *
?B_RTX          EQU  0    ; 0 for applications without real-time OS           *
;                         ; 1 for applications using the RTX-51 real-time OS  *
;                                                                             *
?B_VAR_BANKING  EQU  1    ; Variable Banking via L51_BANK (far memory support)*
;                         ; 0 Variable Banking does not use L51_BANK.A51      *
;                         ; 1 Variable Banking uses this L51_BANK.A51 module  *

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