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Jul - The Cutting Room Floor - Found Developer's Tool in "Generations Lost" New poll - New thread - New reply
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Tony H
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Posted on 11-02-12 03:07:24 AM (last edited by Tony H at 11-03-12 02:01:04 AM) Link | Quote
Generations Lost (Genesis)

While looking in the ROM, I found some previously undocumented passwords. One of them that caught my eye was: AAAC. When you enter that password, it restarted the game (unlike other passwords).

After digging around some, I found that the only thing that password did was set RAM address FFF4B8 to FFFF. The only time that RAM address was being read was in the pause menu. It activates a developer's tool. It shows your co-ordinates in the upper left corner. I have a complete assembly trace of it, so will check to see if it does anything else.

Here's what the ASM looks like when the AAAC password is used (entering the pause menu):

00:7030 4A 78 TST.W ($F4B8) = Checking RAM address FFF4B8 to see if it's equal to zero.
00:7034 67 48 BEQ #$48 [00:707E] = If it's equal to zero, branch to ROM address $00707E.

Since the password set that RAM address to FFFF, it won't branch to $00707E. It will run the "developer's" routine instead.

Here's a ROM patch that changes the conditional branch so it will always run the "developer's" routine: At ROM address $007034, change the 6748 to 4E71. Game Genie code = RF2A-A6VY

I'll add this info to the site as soon as I figure out how to do it (shouldn't take too long).

~~~~

EDIT: Added new page to site.
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Jul - The Cutting Room Floor - Found Developer's Tool in "Generations Lost" New poll - New thread - New reply


Rusted Logic
Acmlmboard - commit 47be4dc [2021-08-23]
©2000-2022 Acmlm, Xkeeper, Kaito Sinclaire, et al.

29 database queries.
Query execution time:  0.085219 seconds
Script execution time:  0.003847 seconds
Total render time:  0.089066 seconds


TidyHTML vomit below
line 1 column 1 - Warning: missing <!DOCTYPE> declaration
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line 148 column 37 - Warning: unescaped & or unknown entity "&id"
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line 156 column 9 - Warning: <div> isn't allowed in <table> elements
line 152 column 17 - Info: <table> previously mentioned
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line 203 column 17 - Warning: discarding unexpected <table>
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line 148 column 44 - Warning: <img> proprietary attribute value "absmiddle"
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Info: Document content looks like HTML5
Info: No system identifier in emitted doctype
Tidy found 66 warnings and 0 errors!


The alt attribute should be used to give a short description
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You are recommended to use CSS to specify the font and
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the size of HTML files and make them easier to maintain
compared with using <FONT> elements.

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Use "white-space: nowrap" to inhibit wrapping in place
of inserting <NOBR>...</NOBR> into the markup.

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