From nduarte@purdue.edu Tue Apr 04 14:41:45 1995 Path: ashpoly!cascade!bigsur!purdue!nduarte From: nduarte@purdue.edu (Natalia Duarte) Newsgroups: comp.sys.m68k Subject: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr04.144145.5962@purdue.edu> Date: Tue, 04 Apr 1995 14:41:45 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. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Natalia Duarte | nduarte@purdue.edu PGP Key fingerprint: C2D5 ED5A EEB0 9E72 "Keep the channels open." From lpopov@pipeline.com Thu Apr 06 18:00:45 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!pipeline!lpopov From: lpopov@pipeline.com (Liam Popov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr06.180045.9475@pipeline.com> Date: Thu, 06 Apr 1995 18:00:45 GMT References: <1995Apr04.144145.5962@purdue.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Apr04.144145.5962@purdue.edu>, nduarte@purdue.edu (Natalia Duarte) writes: > 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. 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. -- === Liam Popov === Dept of Electrical Engineering, The Pipeline Internet Network "Hold for relay." From dreyes@mindspring.com Sat Apr 08 15:34:45 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!mindspring!dreyes From: dreyes@mindspring.com (Diego Reyes) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr08.153445.1771@mindspring.com> Date: Sat, 08 Apr 1995 15:34:45 GMT References: <1995Apr04.144145.5962@purdue.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Apr04.144145.5962@purdue.edu>, nduarte@purdue.edu (Natalia Duarte) 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). -- Diego Reyes Hayes Optima 288 @ 19,200 bps "Hold for relay."