From vtanaka@netcom.com Mon Feb 27 05:56:05 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!vtanaka From: vtanaka@netcom.com (Valeria Tanaka) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb27.055605.6382@netcom.com> Date: Mon, 27 Feb 1995 05:56:05 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Valeria Tanaka Hayes Optima 288 @ 28,800 bps "There are 14 nodes and only 10 countries. Count again." From gweber@delphi.com Mon Feb 27 15:11:05 1995 Path: ashpoly!cascade!brgate!saturno!delphi!gweber From: gweber@delphi.com (Graham Weber) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb27.151105.9851@delphi.com> Date: Mon, 27 Feb 1995 15:11:05 GMT References: <1995Feb27.055605.6382@netcom.com> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Feb27.055605.6382@netcom.com>, vtanaka@netcom.com (Valeria Tanaka) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Graham Weber Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------ From dmuller@mit.edu Tue Feb 28 19:57:05 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!mit!dmuller From: dmuller@mit.edu (Dave Müller) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb28.195705.1769@mit.edu> Date: Tue, 28 Feb 1995 19:57:05 GMT References: <1995Feb27.055605.6382@netcom.com> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Feb27.055605.6382@netcom.com>, vtanaka@netcom.com (Valeria Tanaka) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Dave Müller *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From msantos@purdue.edu Tue Feb 28 23:59:05 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!purdue!msantos From: msantos@purdue.edu (Mikhail Santos) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb28.235905.7008@purdue.edu> Date: Tue, 28 Feb 1995 23:59:05 GMT References: <1995Feb27.055605.6382@netcom.com> <1995Feb28.195705.1769@mit.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Feb28.195705.1769@mit.edu>, dmuller@mit.edu (Dave Müller) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Mikhail Santos | msantos@purdue.edu PGP Key fingerprint: 6F9B C497 070F 2252 "Keep the channels open."