Need help in identify EEPROM chip

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Marcin



Joined: 02 Jan 2005
Posts: 8519
Location: Poland

PostPosted: Thu May 03, 2007 4:17 am    Post subject: Need help in identify EEPROM chip Reply with quote

I can't find info what exactly is that. I would like to flash NES ROM file in this eeprom. I suspect that is NS and 8 bit chip. Only that I know Sad
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Unzlbunzl



Joined: 30 Jan 2007
Posts: 468
Location: Graz, Austria

PostPosted: Thu May 03, 2007 8:44 am    Post subject: Reply with quote

I compared this to cpushacks chips, http://www.cpushack.net/chippics/EPROM/27512/NationalSemiNM27C512Q-200.html
andhttp://www.cpushack.net/chippics/EPROM/27512/NatSemiNM27C512Q-150.html
are the only ones looking very similiar (silicon)
regards
Christian
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CPUShack



Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA

PostPosted: Thu May 03, 2007 11:41 am    Post subject: Reply with quote

its a national 27512, no clue of the speed though Smile
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Marcin



Joined: 02 Jan 2005
Posts: 8519
Location: Poland

PostPosted: Thu May 03, 2007 11:46 am    Post subject: Reply with quote

many thanks for help Smile
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Marcin



Joined: 02 Jan 2005
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PostPosted: Thu May 10, 2007 2:03 pm    Post subject: Reply with quote

what capacity was maximum for 28 pin eeproms ?
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CPUShack



Joined: 16 Jun 2003
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PostPosted: Thu May 10, 2007 2:10 pm    Post subject: Reply with quote

512k standard, some companies made 1024k
http://www.cpushack.com/EPROM.html

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