From rrobertson@inria.fr Fri Jun 10 04:04:12 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!rrobertson From: rrobertson@inria.fr (Rodrigo Robertson) Newsgroups: comp.sys.m68k Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun10.040412.5083@inria.fr> Date: Fri, 10 Jun 1994 04:04:12 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Rodrigo Robertson "Measuring a record you own is listening, not piracy." 486DX4/100 (FreeBSD 2.0.5) / System 7.5.1 From mlarsson@cern.ch Fri Jun 10 23:18:12 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!mlarsson From: mlarsson@cern.ch (Morag Larsson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun10.231812.5932@cern.ch> Date: Fri, 10 Jun 1994 23:18:12 GMT References: <1994Jun10.040412.5083@inria.fr> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1994Jun10.040412.5083@inria.fr>, rrobertson@inria.fr (Rodrigo Robertson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Morag Larsson Tape trading list upon request. SASE required for international mail. From inilsson@netcom.com Sun Jun 12 04:16:12 1994 Path: ashpoly!cascade!bigsur!netcom!inilsson From: inilsson@netcom.com (Ines Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun12.041612.1489@netcom.com> Date: Sun, 12 Jun 1994 04:16:12 GMT References: <1994Jun10.040412.5083@inria.fr> <1994Jun10.231812.5932@cern.ch> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Jun10.231812.5932@cern.ch>, mlarsson@cern.ch (Morag Larsson) writes: > The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Ines Nilsson -- NETCOM On-Line Communication Services "Do not worship the copy." From gschneider@berkeley.edu Sun Jun 12 13:12:12 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!berkeley!gschneider From: gschneider@berkeley.edu (Graham Schneider) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun12.131212.9938@berkeley.edu> Date: Sun, 12 Jun 1994 13:12:12 GMT References: <1994Jun10.040412.5083@inria.fr> <1994Jun10.231812.5932@cern.ch> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jun10.231812.5932@cern.ch>, mlarsson@cern.ch (Morag Larsson) writes: > The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Graham Schneider "They will send a copy in my place." Amiga 3000T / Linux 1.2.13 From snovak@clari.net Mon Jun 13 07:05:12 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!clari!snovak From: snovak@clari.net (Steve Novak) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun13.070512.1679@clari.net> Date: Mon, 13 Jun 1994 07:05:12 GMT References: <1994Jun10.040412.5083@inria.fr> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jun10.040412.5083@inria.fr>, rrobertson@inria.fr (Rodrigo Robertson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. 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. -- Steve Novak *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0