1.1 --- a/src/boot/boot.s	Wed Feb 21 12:00:13 2018 +0200
     1.2 +++ b/src/boot/boot.s	Wed Feb 21 18:00:45 2018 +0200
     1.3 @@ -1,24 +1,20 @@
     1.4  | vi:filetype=gas68k:
     1.5 -
     1.6  	.equ CMD_READ, 2
     1.7  
     1.8  	.equ EXEC_DO_IO, -0x1c8
     1.9  
    1.10  | starting with trackdisk device I/O request pointer in a1
    1.11 -| load the program at 0x100 and return with that value in a0
    1.12 -| program length is patched by mk_adf at start - 4
    1.13 +| load the program at 0x100 and jump there
    1.14 +| program length is patched by mk_adf just before start
    1.15  start:
    1.16 +	move.l -6(%pc), %d0		| get binary size
    1.17 +	move.l %d0, 0x24(%a1)		| I/O length
    1.18  	move.l #0x100, 0x28(%a1)	| I/O data pointer
    1.19 -	move.l start - 4, 0x24(%a1)	| I/O length (1 sector for now)
    1.20  	move.l #512, 0x2c(%a1)		| I/O offset (skip first sector)
    1.21  	move.w #CMD_READ, 0x1c(%a1)	| I/O command
    1.22  	move.l %a1, -(%sp)
    1.23  	jsr EXEC_DO_IO(%a6)
    1.24  	move.l (%sp)+, %a1
    1.25 -	move.b 0x1f(%a1), %d0
    1.26  
    1.27 -	move.l #0x100, %a0
    1.28 -	rts
    1.29 -
    1.30 -	.ascii "bootblock_end"
    1.31 +	bra 0x100
    1.32  	.align 4