From jgirard@kth.se Sun May 14 09:59:20 1995 Path: ashpoly!cascade!transat!ukc!fennimore!kth!jgirard From: jgirard@kth.se (Jen Girard) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995May14.095920.7555@kth.se> Date: Sun, 14 May 1995 09:59:20 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se 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. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. 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. -- Jen Girard US Robotics Courier V.34 @ 14,400 bps "When every node is whole, the channel opens." From lvasiliev@delphi.com Mon May 15 00:30:20 1995 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!lvasiliev From: lvasiliev@delphi.com (Lars Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995May15.003020.1309@delphi.com> Date: Mon, 15 May 1995 00:30:20 GMT References: <1995May14.095920.7555@kth.se> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995May14.095920.7555@kth.se>, jgirard@kth.se (Jen Girard) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Lars Vasiliev Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------