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Vatintman1
Joined: 08 Mar 2020
Posts: 62
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 Posted: Sat Sep 11, 2021 8:48 pm Post subject: Motorola Prototype? |
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| Unknown, any help? Thank you |
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Sat Sep 11, 2021 10:36 pm Post subject: |
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That's a 68705G2L1, a 68705 variant in CMOS, part of the 6805 family of microcontrollers with a 3776 byte EPROM. I don't know more than that.
CPUShack sold some here
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Debs |
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Vatintman1
Joined: 08 Mar 2020
Posts: 62
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| Posted: Sun Sep 12, 2021 12:07 pm Post subject: |
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yy2013
Joined: 12 Sep 2009
Posts: 739
Location: Nagoya, Japan
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| Posted: Wed Sep 15, 2021 8:37 pm Post subject: |
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It has a unique feature of "self-programming".
It has an internal boot-strap ROM, and when it is connected to an external EPROM, it reads its contents and writes them into the internal EPROM by itself.
Some of other 68704/68705 chips also have this ability. |
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