From nnovak@hanse.de Sat Aug 17 11:39:40 1996
Path: ashpoly!cascade!brgate!saturno!hanse!nnovak
From: nnovak@hanse.de (Nadine Novak)
Newsgroups: comp.sys.m68k
Subject: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Aug17.113940.3744@hanse.de>
Date: Sat, 17 Aug 1996 11:39:40 GMT
Organization: Hanse-Netzwerk Hamburg
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Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.

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

Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'?

-- 
Nadine Novak -- Hanse-Netzwerk Hamburg
"The hatch is open. Is anyone listening?"

From hhughes@clari.net Sun Aug 18 18:49:40 1996
Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!hhughes
From: hhughes@clari.net (Hugo Hughes)
Newsgroups: comp.sys.m68k
Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Aug18.184940.9607@clari.net>
Date: Sun, 18 Aug 1996 18:49:40 GMT
References: <1996Aug17.113940.3744@hanse.de>
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In article <1996Aug17.113940.3744@hanse.de>, nnovak@hanse.de (Nadine Novak) writes:
> Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.
> The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle.

Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him.

-- 
Hugo Hughes
Tape trading list upon request. SASE required for international mail.