From kpetrov@berkeley.edu Sun Oct 01 10:50:11 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!kpetrov
From: kpetrov@berkeley.edu (Kenji Petrov)
Newsgroups: comp.sys.m68k
Subject: Observation: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Oct01.105011.4472@berkeley.edu>
Date: Sun, 01 Oct 1995 10:50:11 GMT
Organization: UC Berkeley Department of EECS
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Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.

Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF.
The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle.

Did Marcus take the decryption EPROM with him when he left the lab?

-- 
Kenji Petrov -- UC Berkeley Department of EECS
"They will send a copy in my place."

From fsato@purdue.edu Mon Oct 02 09:34:11 1995
Path: ashpoly!cascade!brgate!saturno!purdue!fsato
From: fsato@purdue.edu (Fiona Sato)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Oct02.093411.9884@purdue.edu>
Date: Mon, 02 Oct 1995 09:34:11 GMT
References: <1995Oct01.105011.4472@berkeley.edu>
Organization: Purdue University Engineering Computer Network
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In article <1995Oct01.105011.4472@berkeley.edu>, kpetrov@berkeley.edu (Kenji Petrov) writes:
> Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.

That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys.

-- 
Fiona Sato -- Purdue University Engineering Computer Network
"In theory there is no difference between theory and practice."