From jmoreau@kiae.su Tue Feb 08 02:39:38 1994 Path: ashpoly!cascade!bigsur!kiae!jmoreau From: jmoreau@kiae.su (Julien Moreau) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb08.023938.6366@kiae.su> Date: Tue, 08 Feb 1994 02:39:38 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- === Julien Moreau === Dept of Electrical Engineering, Kurchatov Institute of Atomic Energy, Moscow "Hardware is temporary. The signal survives." From tperez@inria.fr Wed Feb 09 00:42:38 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!tperez From: tperez@inria.fr (Tyler Pérez) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb09.004238.3225@inria.fr> Date: Wed, 09 Feb 1994 00:42:38 GMT References: <1994Feb08.023938.6366@kiae.su> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Feb08.023938.6366@kiae.su>, jmoreau@kiae.su (Julien Moreau) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Tyler Pérez | tperez@inria.fr PGP Key fingerprint: 3A98 E7FD 3B00 E7CB "Keep the channels open." From etakahashi@tum.de Thu Feb 10 22:33:38 1994 Path: ashpoly!cascade!transat!ukc!fennimore!tum!etakahashi From: etakahashi@tum.de (Élodie Takahashi) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb10.223338.7821@tum.de> Date: Thu, 10 Feb 1994 22:33:38 GMT References: <1994Feb08.023938.6366@kiae.su> <1994Feb09.004238.3225@inria.fr> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Feb09.004238.3225@inria.fr>, tperez@inria.fr (Tyler Pérez) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. -- Élodie Takahashi Practical Peripherals 14.4 @ 19,200 bps "When every node is whole, the channel opens."