From rlee@illinois.edu Tue Dec 27 09:22:58 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!rlee From: rlee@illinois.edu (Renata Lee) Newsgroups: comp.sys.m68k Subject: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Dec27.092258.3445@illinois.edu> Date: Tue, 27 Dec 1994 09:22:58 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Renata Lee *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From kpetrov@kth.se Thu Dec 29 09:47:58 1994 Path: ashpoly!cascade!transat!ukc!fennimore!kth!kpetrov From: kpetrov@kth.se (Kenji Petrov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Dec29.094758.4437@kth.se> Date: Thu, 29 Dec 1994 09:47:58 GMT References: <1994Dec27.092258.3445@illinois.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1994Dec27.092258.3445@illinois.edu>, rlee@illinois.edu (Renata Lee) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Kenji Petrov Zyxel U-1496E @ 33,600 bps "The carrier frequency does not drift by accident." From tduarte@mindspring.com Fri Dec 30 12:27:58 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!mindspring!tduarte From: tduarte@mindspring.com (Takeshi Duarte) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Dec30.122758.7489@mindspring.com> Date: Fri, 30 Dec 1994 12:27:58 GMT References: <1994Dec27.092258.3445@illinois.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Dec27.092258.3445@illinois.edu>, rlee@illinois.edu (Renata Lee) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Takeshi Duarte "A soul is not exclusive to biology." 486DX4/100 (FreeBSD 2.0.5) / AmigaOS 3.1 From tkarlsson@rwth-aachen.de Sun Jan 01 13:53:58 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!rwth-aachen!tkarlsson From: tkarlsson@rwth-aachen.de (Takeshi Karlsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan01.135358.6162@rwth-aachen.de> Date: Sun, 01 Jan 1995 13:53:58 GMT References: <1994Dec27.092258.3445@illinois.edu> <1994Dec29.094758.4437@kth.se> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1994Dec29.094758.4437@kth.se>, kpetrov@kth.se (Kenji Petrov) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Takeshi Karlsson "5 sigma is a discovery. 7 is a question." Macintosh IIfx / NEXTSTEP 3.3 From dgonzalez@berkeley.edu Tue Jan 03 15:12:58 1995 Path: ashpoly!cascade!brgate!saturno!berkeley!dgonzalez From: dgonzalez@berkeley.edu (Diego González) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan03.151258.4146@berkeley.edu> Date: Tue, 03 Jan 1995 15:12:58 GMT References: <1994Dec27.092258.3445@illinois.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Dec27.092258.3445@illinois.edu>, rlee@illinois.edu (Renata Lee) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Diego González Zyxel U-1496E @ 33,600 bps "Extraordinary claims require extraordinary spectra."