From smoreau@purdue.edu Mon Feb 20 14:34:40 1995 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!smoreau From: smoreau@purdue.edu (Sun-mi Moreau) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb20.143440.3784@purdue.edu> Date: Mon, 20 Feb 1995 14:34:40 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Sun-mi Moreau | smoreau@purdue.edu PGP Key fingerprint: 4FB7 CF47 DA0B 1064 "Keep the channels open." From rtakahashi@panix.com Wed Feb 22 13:34:40 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!rtakahashi From: rtakahashi@panix.com (Renata Takahashi) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb22.133440.4050@panix.com> Date: Wed, 22 Feb 1995 13:34:40 GMT References: <1995Feb20.143440.3784@purdue.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Feb20.143440.3784@purdue.edu>, smoreau@purdue.edu (Sun-mi Moreau) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Renata Takahashi Hayes Optima 288 @ 33,600 bps "The carrier frequency does not drift by accident." From rlarsson@cmu.edu Fri Feb 24 09:35:40 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cmu!rlarsson From: rlarsson@cmu.edu (Renata Larsson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb24.093540.1377@cmu.edu> Date: Fri, 24 Feb 1995 09:35:40 GMT References: <1995Feb20.143440.3784@purdue.edu> <1995Feb22.133440.4050@panix.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Feb22.133440.4050@panix.com>, rtakahashi@panix.com (Renata Takahashi) 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. -- Renata Larsson Tape trading list upon request. SASE required for international mail. From ajohansson@pipeline.com Fri Feb 24 10:37:40 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!ajohansson From: ajohansson@pipeline.com (Andrei Johansson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb24.103740.7370@pipeline.com> Date: Fri, 24 Feb 1995 10:37:40 GMT References: <1995Feb20.143440.3784@purdue.edu> <1995Feb22.133440.4050@panix.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Feb22.133440.4050@panix.com>, rtakahashi@panix.com (Renata Takahashi) 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. -- Andrei Johansson Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------ From kperez@pipeline.com Sun Feb 26 04:56:40 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!kperez From: kperez@pipeline.com (Katrin Pérez) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb26.045640.1169@pipeline.com> Date: Sun, 26 Feb 1995 04:56:40 GMT References: <1995Feb20.143440.3784@purdue.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Feb20.143440.3784@purdue.edu>, smoreau@purdue.edu (Sun-mi Moreau) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > 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. -- Katrin Pérez "We don't sign stars. We build them." Mac IIci / 68882 FPU / System 7.5.1