From mgarcia@kth.se Thu Jun 22 07:15:01 1995 Path: ashpoly!cascade!mxgate!coyoacan!kth!mgarcia From: mgarcia@kth.se (Mei García) Newsgroups: comp.sys.m68k Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun22.071501.7050@kth.se> Date: Thu, 22 Jun 1995 07:15:01 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N 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. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Mei García | mgarcia@kth.se PGP Key fingerprint: 6DFF BBCD FF46 1E23 "Keep the channels open." From jnovak@unam.mx Fri Jun 23 13:05:01 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!unam!jnovak From: jnovak@unam.mx (Jens Novak) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun23.130501.6695@unam.mx> Date: Fri, 23 Jun 1995 13:05:01 GMT References: <1995Jun22.071501.7050@kth.se> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jun22.071501.7050@kth.se>, mgarcia@kth.se (Mei García) 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. -- Jens Novak "Extraordinary claims require extraordinary spectra." Sun 3/60 (SunOS 4.1.1) / Linux 1.2.13 From yokonkwo@panix.com Fri Jun 23 16:01:01 1995 Path: ashpoly!cascade!mxgate!coyoacan!panix!yokonkwo From: yokonkwo@panix.com (Yuki Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun23.160101.8717@panix.com> Date: Fri, 23 Jun 1995 16:01:01 GMT References: <1995Jun22.071501.7050@kth.se> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jun22.071501.7050@kth.se>, mgarcia@kth.se (Mei García) 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. -- Yuki Okonkwo | yokonkwo@panix.com PGP Key fingerprint: DB59 0552 B6BC F75F "Keep the channels open."