From emartinez@cam.ac.uk Tue Feb 01 21:14:21 1994 Path: ashpoly!cascade!mxgate!coyoacan!cam!emartinez From: emartinez@cam.ac.uk (Emi Martínez) Newsgroups: comp.sys.m68k Subject: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb01.211421.5953@cam.ac.uk> Date: Tue, 01 Feb 1994 21:14:21 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk 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. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Emi Martínez Tape trading list upon request. SASE required for international mail. From kwatanabe@pacbell.net Wed Feb 02 16:02:21 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!kwatanabe From: kwatanabe@pacbell.net (Kenji Watanabe) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb02.160221.7714@pacbell.net> Date: Wed, 02 Feb 1994 16:02:21 GMT References: <1994Feb01.211421.5953@cam.ac.uk> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Feb01.211421.5953@cam.ac.uk>, emartinez@cam.ac.uk (Emi Martínez) writes: > 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. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Kenji Watanabe SupraFAXModem 28.8 @ 14,400 bps "We don't sign stars. We build them." From mduarte@netcom.com Fri Feb 04 03:39:21 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!mduarte From: mduarte@netcom.com (Mike Duarte) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb04.033921.6575@netcom.com> Date: Fri, 04 Feb 1994 03:39:21 GMT References: <1994Feb01.211421.5953@cam.ac.uk> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Feb01.211421.5953@cam.ac.uk>, emartinez@cam.ac.uk (Emi Martínez) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. 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. -- Mike Duarte Opinions expressed are solely my own and not those of NETCOM On-Line Communication Services. ------------------------------------------------------------ From rsantos@purdue.edu Sat Feb 05 20:50:21 1994 Path: ashpoly!cascade!bigsur!purdue!rsantos From: rsantos@purdue.edu (Renata Santos) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb05.205021.1232@purdue.edu> Date: Sat, 05 Feb 1994 20:50:21 GMT References: <1994Feb01.211421.5953@cam.ac.uk> <1994Feb02.160221.7714@pacbell.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Feb02.160221.7714@pacbell.net>, kwatanabe@pacbell.net (Kenji Watanabe) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Renata Santos *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From krodriguez@pipeline.com Sun Feb 06 19:58:21 1994 Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!krodriguez From: krodriguez@pipeline.com (Katrin Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb06.195821.7519@pipeline.com> Date: Sun, 06 Feb 1994 19:58:21 GMT References: <1994Feb01.211421.5953@cam.ac.uk> <1994Feb04.033921.6575@netcom.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Feb04.033921.6575@netcom.com>, mduarte@netcom.com (Mike Duarte) 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. 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. -- Katrin Rodríguez "The hatch is open. Is anyone listening?" Pentium 90 (OS/2 Warp) / TOS 4.04