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No reason to keep the .prg startup asm code inside the first 512 bytes, this frees up some space for the floppy code. 

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30446 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
François Revol 2009-04-26 21:45:36 +00:00
parent 42da6c963c
commit 901b8dd28a
1 changed files with 78 additions and 79 deletions
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157
src/system/boot/platform/atari_m68k/shell.S
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@ -111,7 +111,7 @@ floppy_start:
//bra floppy_start
// no interrupt
or.w #0x0700,%sr
//or.w #0x0700,%sr
//XXX: check for enough RAM
@ -123,10 +123,7 @@ floppy_start:
//bsr putx
bsr load_sectors
tst.w %d0
beq floppy_done
lea failure_string,%a0
bsr puts
bra spin
bne load_failed
floppy_done:
lea h4,%a0
bsr puts
@ -138,6 +135,11 @@ floppy_done:
//jmp ATARI_ZBEOS_BASE+512
jmp _start
load_failed:
lea failure_string,%a0
bsr puts
spin:
bra spin
//rts
/** Loads %d2 sectors from floppy disk, starting at head XXX %dh, sector %cx.
@ -191,80 +193,6 @@ failure_string:
// .org DOT_STRING
.string "."
/*
* \AUTO\HAIKU.PRG and ARAnyM BOOTSTRAP() support code
*/
prg_start:
//lea h4,%a0
//bsr puts
// .prg:
// we need to switch to supervisor mode anyway
move.l #SUP_SET,-(%sp)
move.w #0x20,-(%sp)
trap #1
addq.l #6,%sp
move.l %d0,saved_super_stack
#if 1
//_membot
move.l #0x432,%a0
move.l (%a0),%d0
bsr putx
//_memtop
move.l #0x436,%a0
move.l (%a0),%d0
bsr putx
//_v_bas_ad
move.l #0x44e,%a0
move.l (%a0),%d0
bsr putx
#endif
// disable interrupts
//or.w #0x0700,%sr
// setup stack
move.l #ATARI_ZBEOS_STACK_END,%sp
lea h5,%a0
bsr puts
lea _bs_entry,%a0
move.l %a0,%d0
bsr putx
// copy the rest of the prg
// load counter
clr.l %d0
move.w sNumSectors,%d0
sub.w #1,%d0
// load addresses
lea _bs_entry,%a0
move.l #ATARI_ZBEOS_BASE,%a1
nextsect:
move.l #512/4-1,%d1
copysect_loop:
move.l (%a0)+,(%a1)+
dbf %d1,copysect_loop
//bsr putx
dbf %d0,nextsect
lea msg_j1,%a0
bsr puts
// all done
spin:
//bra spin
super_done:
// XXX: copy the rest !
move.l #0,%d0
//jmp ATARI_ZBEOS_BASE+512
jmp _start
saved_super_stack:
.long 0
@ -368,3 +296,74 @@ shell_end:
// this block as valid boot block for the BIOS
// XXX: actually TOS wants a real checksum here so sum is 0x1234!
/*
* \AUTO\HAIKU.PRG and ARAnyM BOOTSTRAP() support code
*/
prg_start:
//lea h4,%a0
//bsr puts
// .prg:
// we need to switch to supervisor mode anyway
move.l #SUP_SET,-(%sp)
move.w #0x20,-(%sp)
trap #1
addq.l #6,%sp
move.l %d0,saved_super_stack
#if 1
//_membot
move.l #0x432,%a0
move.l (%a0),%d0
bsr putx
//_memtop
move.l #0x436,%a0
move.l (%a0),%d0
bsr putx
//_v_bas_ad
move.l #0x44e,%a0
move.l (%a0),%d0
bsr putx
#endif
// disable interrupts
//or.w #0x0700,%sr
// setup stack
move.l #ATARI_ZBEOS_STACK_END,%sp
lea h5,%a0
bsr puts
lea _bs_entry,%a0
move.l %a0,%d0
bsr putx
// copy the rest of the prg
// load counter
clr.l %d0
move.w sNumSectors,%d0
sub.w #1,%d0
// load addresses
lea _bs_entry,%a0
move.l #ATARI_ZBEOS_BASE,%a1
nextsect:
move.l #512/4-1,%d1
copysect_loop:
move.l (%a0)+,(%a1)+
dbf %d1,copysect_loop
//bsr putx
dbf %d0,nextsect
lea msg_j1,%a0
bsr puts
// all done
super_done:
// XXX: copy the rest !
move.l #0,%d0
//jmp ATARI_ZBEOS_BASE+512
jmp _start