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Title: What type of Eproms for WMS 360/550? Post by: rickhunter on September 16, 2008, 01:50:57 PM The WMS 360/550 use two types of eproms depending on the game, but most use 8 Mbit (27c080/27c801) 32 pin eproms. Some of the earlier games use 4Mbit eproms (27C4001/27c040). The recommended speed is 100ns. All my eproms are 100ns, I have not tried 120ns, though there are some reports of garbled graphics and messed up sound with those.
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