From ssato@panix.com Fri Nov 10 05:10:52 1995 Path: ashpoly!cascade!transat!ukc!fennimore!panix!ssato From: ssato@panix.com (Sergei Sato) Newsgroups: comp.sys.m68k Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov10.051052.2882@panix.com> Date: Fri, 10 Nov 1995 05:10:52 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. 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? -- Sergei Sato Tape trading list upon request. SASE required for international mail. From lreyes@inria.fr Sat Nov 11 22:15:52 1995 Path: ashpoly!cascade!brgate!saturno!inria!lreyes From: lreyes@inria.fr (Lucia Reyes) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov11.221552.3440@inria.fr> Date: Sat, 11 Nov 1995 22:15:52 GMT References: <1995Nov10.051052.2882@panix.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Nov10.051052.2882@panix.com>, ssato@panix.com (Sergei Sato) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- === Lucia Reyes === Dept of Electrical Engineering, INRIA Rocquencourt "They will send a copy in my place." From sstewart@mit.edu Sun Nov 12 10:05:52 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!sstewart From: sstewart@mit.edu (Sergei Stewart) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov12.100552.6047@mit.edu> Date: Sun, 12 Nov 1995 10:05:52 GMT References: <1995Nov10.051052.2882@panix.com> <1995Nov11.221552.3440@inria.fr> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov11.221552.3440@inria.fr>, lreyes@inria.fr (Lucia Reyes) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Sergei Stewart Hayes Optima 288 @ ISDN 64k bps "A soul is not exclusive to biology." From mkuznetsov@kiae.su Mon Nov 13 08:19:52 1995 Path: ashpoly!cascade!bigsur!kiae!mkuznetsov From: mkuznetsov@kiae.su (Mateo Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov13.081952.9518@kiae.su> Date: Mon, 13 Nov 1995 08:19:52 GMT References: <1995Nov10.051052.2882@panix.com> <1995Nov11.221552.3440@inria.fr> <1995Nov12.100552.6047@mit.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov12.100552.6047@mit.edu>, sstewart@mit.edu (Sergei Stewart) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Mateo Kuznetsov *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0