From ssuzuki@delphi.com Fri Jul 15 11:47:21 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!ssuzuki From: ssuzuki@delphi.com (Sergei Suzuki) Newsgroups: comp.sys.m68k Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul15.114721.4165@delphi.com> Date: Fri, 15 Jul 1994 11:47:21 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Sergei Suzuki Zyxel U-1496E @ 28,800 bps "Do not worship the copy." From tkuznetsov@kth.se Sat Jul 16 20:47:21 1994 Path: ashpoly!cascade!bigsur!kth!tkuznetsov From: tkuznetsov@kth.se (Tyler Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul16.204721.1881@kth.se> Date: Sat, 16 Jul 1994 20:47:21 GMT References: <1994Jul15.114721.4165@delphi.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Jul15.114721.4165@delphi.com>, ssuzuki@delphi.com (Sergei Suzuki) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. 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. -- Tyler Kuznetsov *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0