MAMEWorld >> EmuChat
Previous thread Previous  View all threads Index   Next thread Next   Flat Mode Flat  

gregf
Ramtek's Trivia promoter
Reged: 09/20/03
Posts: 7711
Loc: southern CA, US
Send PM
skyarmy and rom FIXED BITS curiosity
03/18/20 03:09 AM


I am curious about the method of how the bad bits were dealt with between different games. OG did a fix for Skyarmy, but not indicating bits were adjusted to get Sky Army working.

Whereas the questionable gratiaa rom was noted as having ' // FIXED BITS (xxxxxxxx11111111)' until another rom from another pcb was dumped and compared and verified.


I thought skyarmy rom file had to be treated similar to gratiaa with // FIXED BITS
description being shown until a different Sky Army pcb can be found and the rom in question can be verified and compared with a different Sky Army pcb. iirc it may have been off by a couple bits. I thought any simple rom adjustment even required having the
' // FIXED BITS (xxxxxxxx11111111)' disclaimer notice until a rom from a different pcb is used for comparing and maybe fixing the bug issue.


Wasn't the ' // FIXED BITS (xxxxxxxx11111111)' disclaimer being used until a working rom image could replace old bad rom image a mandatory thing? I thought it was even though that was many years ago and since then a lot has changed over the years.


-
Mar 7, 2020

https://github.com/mamedev/mame/commit/87cab5bf6a62c63056edeb207aceef748096dee8

skyarmy: Fix bitrot, makes the game fully playable [O. Galibert]

ROM_LOAD( "a1h.bin", 0x0000, 0x2000, CRC(e3fb9d70) SHA1(b8e3a6d7d6ef30c1397f9b741132c5257c16be2d) )
ROM_LOAD( "a1h.bin", 0x0000, 0x2000, CRC(46507488) SHA1(a9a43caa6f3eab48c3fd9e2f34fe2b4aacfd4641) )


-
Mar 18, 2020

https://github.com/mamedev/mame/commit/d0d0c1018b6a1044fd8fb3beba173e86a5d300b4

ms32.cpp: Verified the background graphics ROM from gratiaa is correct. [Apocalypse]

-// ROM_LOAD( "mr94019-07.10", 0x000000, 0x200000, BAD_DUMP CRC(acb75824) SHA1(3b43e00a2d240761565042c8feead25a83ef0eb1) ) // FIXED BITS (xxxxxxxx11111111)
- ROM_LOAD( "mr94019-07.10", 0x000000, 0x200000, BAD_DUMP CRC(561a786b) SHA1(23df08d50801bd6e4a2f12dd3bb50632ff77f0f2) ) /* HAND CRAFTED: decrypted & re-encrypted 94019_2.07 - marked BAD_DUMP until proper ROM redump */
+ ROM_LOAD( "mr94019-07.10", 0x000000, 0x200000, CRC(561a786b) SHA1(23df08d50801bd6e4a2f12dd3bb50632ff77f0f2) )
-







Entire thread
Subject Posted by Posted on
* skyarmy and rom FIXED BITS curiosity gregf 03/18/20 03:09 AM
. * Re: skyarmy and rom FIXED BITS curiosity smf  03/18/20 08:54 PM
. * Re: skyarmy and rom FIXED BITS curiosity Olivier Galibert  03/21/20 05:51 AM
. * Re: skyarmy and rom FIXED BITS curiosity gregf  03/20/20 01:06 AM
. * Re: skyarmy and rom FIXED BITS curiosity smf  03/20/20 08:36 AM
. * Re: skyarmy and rom FIXED BITS curiosity gregf  03/20/20 04:49 PM
. * Re: skyarmy and rom FIXED BITS curiosity AJR Hacker  03/18/20 11:21 AM
. * Re: skyarmy and rom FIXED BITS curiosity gregf  03/20/20 01:30 AM
. * Re: skyarmy and rom FIXED BITS curiosity Haze  03/18/20 11:33 AM
. * Re: skyarmy and rom FIXED BITS curiosity StilettoAdministrator  03/18/20 07:46 PM

Extra information Permissions
Moderator:  redk9258, URherenow, Tafoid 
0 registered and 8 anonymous users are browsing this forum.
You cannot start new topics
You cannot reply to topics
HTML is enabled
UBBCode is enabled
Thread views: 280