romtool (0.4.0, also tried git): v33/v34 split -> build (straight from split) -> no boot (grey screen)

[rvalles]

I split a rom that's in the database (A500's 34.5, possibly most common rom ever).
Then I do rebuild it.
Then I try to boot it with an emulated A500. It ends up stuck in grey screen. The original rom I splitted from does of course work.
Same issue with rebuilt 33.180.
But rebuilt 37.175 does work.

Commands and outputs for 34.5 below.

34.5(A500-A200-A1000)]$ romtool build -o ../my.rom -t kick -s 256 index.txt
Header 11114ef9 256
34.5(A500-A200-A1000)]$ romtool info ../my.rom
Header 11114ef9 256
Header 11114ef9 256
size ok
header ok
footer ok
size_field ok
chk_sum ok
kickety_split NOK
magic_reset ok
is_kick ok
check_sum 2fe69ad4
base_addr 00f80000
boot_pc 00f800d2
rom_rev 34.5
exec_rev 34.2
34.5(A500-A200-A1000)]$ romtool scan ../my.rom
@000000b6 +00003276 NT_LIBRARY +120 exec.library exec 34.2 (28 Oct 1987)
@00003276 +00003290 NT_UNKNOWN +5 alert.hook alert.hook
@00003508 +0000445c NT_DEVICE +40 audio.device audio 34.1 (18 Aug 1987)
@00004574 +000047f8 NT_RESOURCE +80 cia.resource cia 34.1 (18 Aug 1987)
@000047fc +00004b5c NT_RESOURCE +70 disk.resource disk 34.1 (18 Aug 1987)
@00004b64 +000051d8 NT_LIBRARY +110 expansion.library expansion 34.1 (18 Aug 1987)
@000053e4 +000108b8 NT_LIBRARY +65 graphics.library graphics 34.1 (18 Aug 1987)
@00013d8c +0001ff94 NT_LIBRARY +10 intuition.library intuition 34.3 (16 Nov 1987)
@000209a4 +00020a0c NT_LIBRARY +31 layers.library layers 34.1 (18 Aug 1987)
@00023da4 +00024288 NT_LIBRARY +0 mathffp.library mathffp 34.1 (18 Aug 1987)
@000242d0 +000243d8 NT_RESOURCE +70 misc.resource misc 34.1 (18 Aug 1987)
@000243dc +00024524 NT_RESOURCE +100 potgo.resource potgo 34.1 (18 Aug 1987)
@00024528 +00024ac8 NT_LIBRARY +70 ramlib.library ramlib 34.1 (18 Aug 1987)
@00024b44 +00024b8e NT_RESOURCE +100 keymap.resource keymap ri 34.1 (18 Aug 1987)
@00024b8e +00024bda NT_DEVICE +60 keyboard.device keyboard ri 34.1 (18 Aug 1987)
@00024bda +00024c26 NT_DEVICE +60 gameport.device gameport ri 34.1 (18 Aug 1987)
@00024c26 +00024c6c NT_DEVICE +40 input.device input ri 34.1 (18 Aug 1987)
@00024c6c +00026234 NT_DEVICE +20 console.device console ri 34.1 (18 Aug 1987)
@000283e0 +0002841a NT_UNKNOWN -60 strap strap 34.4 (9 Dec 1987)
@00028d6c +00029558 NT_DEVICE +50 timer.device timer 34.1 (18 Aug 1987)
@00029564 +0002b05c NT_DEVICE +20 trackdisk.device trackdisk 34.1 (18 Aug 1987)
@0002b060 +0002b380 NT_LIBRARY -40 romboot.library romboot 34.1 (18 Aug 1987)
@0002b47c +0003310c NT_TASK +0 workbench.task wb 34.1 (18 Aug 1987)
@00033e62 +00033e94 NT_LIBRARY +0 dos.library dos 34.3 (9 Dec 1987)

[cnvogelg]

To be honest... never tried splitting/building old ROMS...
A quick test of splitting and rebuilding showed and (almost) identical ROM:

> romtool build -a 0xfc0000 -s 256 -o test.rom -f index.txt
> romtool diff amiga-os-130.rom test.rom
0003ffe8: 15 0b -- b3 -- -- -- --  .. .     | 14 b3 -- b4 -- -- -- --  .. .
0003fff0: ff c0 -- -- -- -- -- --  ..       | 00 18 -- -- -- -- -- --  ..

So the footer seems to get mixed up...

When building custom ROMs from the old Kickststarts one thing remains: BCPL-based DOS code in the dos.library might need relocations. The BCPL relocations are available in the split files but currently not implemented in amitools...

[rvalles]

Perhaps it'd be best to add a note in the documentation about it only working on kick 36+ or 37+, for now.