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Author Topic: Roll-chan 4 (Japanese) Patching Error  (Read 1431 times)

Kharon Alpua

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Roll-chan 4 (Japanese) Patching Error
« on: September 27, 2018, 05:52:23 pm »
I don't know if this is a known issue and I have an incorrect version of Rockman 4 - Aratanaru Yabou!!, but when patching the file with the ROLLCHAN4-JP patches, I was notified that the the patch seemed to not be made for this rom. On review, I noticed that the Rockman 4 version expects a 7 Mb ROM rather than the 4 Mb file size of the original releases in both Japan and the USA -- the patch appears to apply (to a preliminary review) properly, but if the Rockman 4 patch is looking for a different ROM, I don't know what version it's looking for.

Here is the information on what files the Roll-chan 4 patches are designed for:

File:   Rockman 4 - Aratanaru Yabou!! (J).nes
Length: 1042584 Bytes (7 Mbit)
CRC32:  88AB8AE7
MD5:    9D4F838F 48C04C11 6F42DE30 724D9244
SHA1:   987E9765 BDA58D08 51E65810 B6F11BC1 FD70AB4B

And here is my file:

File:    Rockman 4 - Aratanaru Yabou!! (Japan).nes
Length: 524304 Bytes (4 Mbit)
CRC32: 87D674E6
MD5: 8B4B65D6 8DEDC70A 537505BD A430DAE9
SHA1: C33C6FA5 B0A5B010 AF6B38CB D22252A5 95500A5A

=====

Here's another example of a Rockman 4 ROM with different values, but still only a 4 Mbit size:

Rockman 4 - Aratanaru Yabou!! (Japan).nes - NOINTRO
CRC32: 771A9138
MD5: 8B4B65D6 8DEDC70A 537505BD A430DAE9
SHA1: C33C6FA5 B0A5B010 AF6B38CB D22252A5 95500A5A

This data is from the Rockman 4 Endless page, and while my CRC32 doesn't match the value for this version, my MD5 and SHA1 are both identical. It seems that the Roll-chan 4 JP patches are designed for a non-standard version of Rockman 4, and I'm not sure if that's due to a hack being used as the base, or some other error.

If anybody is familiar with this problem, Zynk Oxhyde or anybody else, I'd appreciate some help understanding what the problem is with this.

KingMike

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Re: Roll-chan 4 (Japanese) Patching Error
« Reply #1 on: September 27, 2018, 09:46:54 pm »
I don't know what size that is but 1042584 Bytes is not 7 megabits. It is about 6KB short of 8 megabit.
(or $FE898. What a VERY weird ROM size. :P )
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Kharon Alpua

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Re: Roll-chan 4 (Japanese) Patching Error
« Reply #2 on: October 04, 2018, 09:36:21 pm »
I have played through most of the game so far and there are no apparent glitches in patching my copy of Rockman 4 with this patch. I have yet to complete the Wily Castle and see the end sequence, but at least through Wily 2, there are no errors or misbehaviors within the patched version of the ROM. I intend to finish the Wily stages tomorrow to verify if any errors appear, but as a primarily graphical hack, it seems that the patch works perfectly so far.

UPDATE: I completed the game and there are no graphical errors in the Japanese version despite the mismatched filesize.
« Last Edit: October 06, 2018, 05:53:52 pm by Kharon Alpua »

Zynk

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Re: Roll-chan 4 (Japanese) Patching Error
« Reply #3 on: November 07, 2018, 08:30:17 am »
Thanks for the report. The patch is recreated with the correct ROM. Good thing that the modified ROM matches the size of the original. The US version is still the same.