VDC Game Translation

A quick and dirty memory map of the game.

$02 - $0fff - shared memory
bank 0 - $1000 - $bfff - game kernel aka library and linker and any other code that is shared between the moduals
bank 1 - $1000 - $bfff - the transient code that is loaded in depending on what part of the game we are in.
$c000 - $feff - Kernal rom.

most of the global variables will fit into shared memory with code used to call code between banks.

Extra variable will be under kernal ram if needed space.

Well not sure which of the JSR loads the file, but whatever it is, it should call JSR $FF68 with .A = 1 (load file into bank 1) and .X = 0 (filename in bank 0). I mean the code shown is in Bank 0, but the modules load into Bank 1? Then that should work.

Umm, if you needed to load into to Bank 0 for some reason, you would need to call JSR FF68 again with different parameters.

If it only loads into Bank 1 after core/library/linker is loaded, another option would be to call $FF68 during startup. Then it wouldn't need to be called every LOAD.

Anyway, what assembler are you using? The #region directive I don't understand.

code update
start           lda vari7f11
               bne @skip
               lda vari7f12
               sta vari4bee
               lda #$01
               sta vari7f12
@skip           lda #%00001110 ;custom bank0 with kernal and i/o in
               sta $ff00
               jsr SetIrqNormal
               lda #$00
               sta vari03fc
               lda #$01
               ldx #$00
               jsr $ff68 ;set load bank1 filename in bank0
@loop           ldx vari7f11
               lda lowadd,x
               sta $28
               lda highadd,x
               sta $2a
               lda length,x
               ldx #$00
               ldy #$08
               jsr subr3159 ;load file
               beq @skip1
               jsr subr453b ;error msg
               jmp @loop
@skip1          lda #<progstart
               sta jsradd1+1
               lda #>progstart
               sta jsradd1+2
               jsr jsrbnk1     ;jsr to our program in custbank1
               jmp start

file1 text "GEN"
file2 TEXT "DUNGEON"
file3 TEXT "COMBAT"
file4 TEXT "INIT"
file5 TEXT "COM.PREP"
file6 TEXT "POST.COM"
file7 TEXT "FINAL"
file8 TEXT "CAMP"
length byte $03,$07,$06,$04,$08,$08,$05,$05
lowadd bytes <file1*1,<file2*1,<file3*1,<file4*1
      bytes <file5*1,<file6*1,<file7*1,<file8*1
highadd bytes >file1*1,>file2*1,>file3*1,>file4*1
       bytes >file5*1,>file6*1,>file7*1,>file8*1

cool, it looks like it is coming along

only thing, is with the BASIC init program, I would change line 35 to have "dd = peek(186)" which would set the disk device to the last one used (presumably where the BASIC program came from).

This of course assumes the game doesn't require disk to be unit 8 for some stupid reason.