From nlarsson@clari.net Fri Feb 25 23:12:04 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!clari!nlarsson From: nlarsson@clari.net (Nadia Larsson) Newsgroups: comp.sys.m68k Subject: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb25.231204.8268@clari.net> Date: Fri, 25 Feb 1994 23:12:04 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Nadia Larsson Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------ From gpopov@uni-hamburg.de Sat Feb 26 05:18:04 1994 Path: ashpoly!cascade!brgate!saturno!uni-hamburg!gpopov From: gpopov@uni-hamburg.de (Göran Popov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb26.051804.5756@uni-hamburg.de> Date: Sat, 26 Feb 1994 05:18:04 GMT References: <1994Feb25.231204.8268@clari.net> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Feb25.231204.8268@clari.net>, nlarsson@clari.net (Nadia Larsson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Göran Popov "The carrier frequency does not drift by accident." Acorn RiscPC 600 / SunOS 4.1.4 From dfischer@hanse.de Sun Feb 27 02:22:04 1994 Path: ashpoly!cascade!mxgate!coyoacan!hanse!dfischer From: dfischer@hanse.de (Diego Fischer) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb27.022204.3550@hanse.de> Date: Sun, 27 Feb 1994 02:22:04 GMT References: <1994Feb25.231204.8268@clari.net> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Feb25.231204.8268@clari.net>, nlarsson@clari.net (Nadia Larsson) 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. -- Diego Fischer SupraFAXModem 28.8 @ 9600 Telebit bps "A soul is not exclusive to biology." From sreyes@earthlink.net Mon Feb 28 22:55:04 1994 Path: ashpoly!cascade!brgate!saturno!earthlink!sreyes From: sreyes@earthlink.net (Sun-mi Reyes) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb28.225504.3021@earthlink.net> Date: Mon, 28 Feb 1994 22:55:04 GMT References: <1994Feb25.231204.8268@clari.net> <1994Feb27.022204.3550@hanse.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Feb27.022204.3550@hanse.de>, dfischer@hanse.de (Diego Fischer) writes: > 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. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Sun-mi Reyes -- EarthLink Network "5 sigma is a discovery. 7 is a question." From tsmirnov@kiae.su Tue Mar 01 15:42:04 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!kiae!tsmirnov From: tsmirnov@kiae.su (Thiago Smirnov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Mar01.154204.3796@kiae.su> Date: Tue, 01 Mar 1994 15:42:04 GMT References: <1994Feb25.231204.8268@clari.net> <1994Feb27.022204.3550@hanse.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Feb27.022204.3550@hanse.de>, dfischer@hanse.de (Diego Fischer) writes: > 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. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- === Thiago Smirnov === Dept of Electrical Engineering, Kurchatov Institute of Atomic Energy, Moscow "5 sigma is a discovery. 7 is a question."