This is based on Manuel's template of a couple weeks ago, but simplified slightly (I couldn't shoehorn Space Instigators into the original because my tables are packed really tight at the top of ROM...).
To change banks, just JMP to the start of the current bank (ie: jmp Start0 or jmp Start1 will switch to the other bank)
Program starts running in Bank0.
processor 6502
include vcs.h
SEG.U vars
ORG $80
;Variables here
SEG Bank0
ORG $1000
RORG $D000
Start0:
BIT $1FF9 ;Switch to other bank
;First ~4k Code Here
;
;
ORG $1FF8
RORG $DFF8
.byte 0,0
ORG $1FFC
RORG $DFFC
.word Start0
.word Start0
SEG.U vars
ORG $80
;Variables here
SEG Bank1
ORG $2000
RORG $F000
Start1:
BIT $1FF8 ;Switch to other bank
;Second ~4k Code Here
;
;
ORG $2FF8
RORG $FFF8
.byte 0,0
ORG $2FFC
RORG $FFFC
.word Start1
.word Start1
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