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Kale |
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Il Sindaco
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Reged: 09/26/03
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Posts: 155
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Loc: Naples, Italy
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Re: toggling roms.
06/29/09 03:04 PM
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From your description it looks like a normal ROM bankswitch. If so, you should see what I/O port the OE is connected and use the bankswitch system on it (maybe with external region(s) with ROMREGION_ERASEFF and a region size multiplied by 2, if that will simplify your life). For an example, check the bank instances in the sfbonus.c driver. When the ROM is enabled, you call a bankswitch with length = 0, when it's disabled, you call the bankswitch with length = size of the ROM. If done correctly, the latter case will call that region with everything filled with 0xff.
Edited by Kale (06/29/09 03:14 PM)
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Re: toggling roms.
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