From jlee@delphi.com Thu Nov 16 04:38:06 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!delphi!jlee From: jlee@delphi.com (Julien Lee) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov16.043806.2761@delphi.com> Date: Thu, 16 Nov 1995 04:38:06 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 10 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'. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Julien Lee -- Delphi Internet Services "Extraordinary claims require extraordinary spectra." From emoreau@unam.mx Thu Nov 16 15:15:06 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!emoreau From: emoreau@unam.mx (Élodie Moreau) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov16.151506.2644@unam.mx> Date: Thu, 16 Nov 1995 15:15:06 GMT References: <1995Nov16.043806.2761@delphi.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov16.043806.2761@delphi.com>, jlee@delphi.com (Julien Lee) 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. -- Élodie Moreau Tape trading list upon request. SASE required for international mail. From tschneider@berkeley.edu Sat Nov 18 03:12:06 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!tschneider From: tschneider@berkeley.edu (Tyler Schneider) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov18.031206.2515@berkeley.edu> Date: Sat, 18 Nov 1995 03:12:06 GMT References: <1995Nov16.043806.2761@delphi.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov16.043806.2761@delphi.com>, jlee@delphi.com (Julien Lee) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Tyler Schneider "We don't sign stars. We build them." PC-9821Ap2 (NEC) / System 7.5.1 From jsato@delphi.com Sun Nov 19 03:56:06 1995 Path: ashpoly!cascade!brgate!saturno!delphi!jsato From: jsato@delphi.com (Ji-woo Sato) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov19.035606.6940@delphi.com> Date: Sun, 19 Nov 1995 03:56:06 GMT References: <1995Nov16.043806.2761@delphi.com> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Nov16.043806.2761@delphi.com>, jlee@delphi.com (Julien Lee) 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. -- Ji-woo Sato US Robotics Courier V.34 @ 14,400 bps "The carrier frequency does not drift by accident."