; Debug Bootblock - Green Screen Loop
    MACHINE 68000
    ORG 0

    dc.b    'D','O','S',0       ; DOS magic
    dc.l    0                   ; Checksum
    dc.l    880                 ; Rootblock

; Boot code
DMACON  EQU $096
COLOR00 EQU $180

boot_start:
    ; Direct hardware access to set color
    lea     $dff000,a6          ; Custom Chips Base
    
    ; Disable DMA to be safe
    move.w  #$7FFF,DMACON(a6)
    
    ; Set Background Color to GREEN
    move.w  #$0F0,COLOR00(a6)
    
.loop:
    ; Infinite loop
    bra.s   .loop

; Pad to 1024 bytes
    dcb.b   1024-(*-0),0