bms_read_write

Description

read or Write bytes (TR0 and TR1 contains the data copyied from bank)

Input

Accumulator : contains the low ptr to the bms structure
X Register : contains the high ptr byte to the bms structure
Y Register : mode

Example

 ; Store size
 lda #<5
 sta TR2
 lda #>5
 sta TR3
 ldx #>5
 ; Store ptr
 lda #<str
 sta TR0
 lda #>str
 sta TR1
 ldy #BMS_WRITE_MODE
 lda bms_ptr
 ldx bms_ptr + 1
 jsr bms_read_write
 rts
str:
 .asciiz "hello"

Description

compute bank and set depending of the offset (bms_ptr must be set), and set current bank set

Modify

RESB
TR0
libzp
libzp+9