This eprom contains the standard, factory rom file for the BIOS of sinclair zx spectrum computer.
Use this chip to replace a faulty ROM chip (IC5) of the zx spectrum computer.
(Notice: This eprom chip requires minor changes of the motherboard. To replace the factory ROM with this EPROM, you need to do a small modification to the motherboard, please refer to this link: http://blog.retroleum.co.uk/electronics-articles/how-to-replace-the-rom-of-a-zx-spectrum-with-an-eprom/)
(replaces chips: NEC/ HITACHI D23128C, HN613128P etc. labeled "IC5" on the motherboard)
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