From mpetrov@pacbell.net Wed Jan 10 00:43:29 1996 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!mpetrov From: mpetrov@pacbell.net (Mike Petrov) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan10.004329.8558@pacbell.net> Date: Wed, 10 Jan 1996 00:43:29 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net 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. 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. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Mike Petrov | mpetrov@pacbell.net PGP Key fingerprint: 3FE8 CD4A B104 F171 "Keep the channels open." From stanaka@ox.ac.uk Wed Jan 10 23:11:29 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!ox!stanaka From: stanaka@ox.ac.uk (Sven Tanaka) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan10.231129.5783@ox.ac.uk> Date: Wed, 10 Jan 1996 23:11:29 GMT References: <1996Jan10.004329.8558@pacbell.net> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jan10.004329.8558@pacbell.net>, mpetrov@pacbell.net (Mike Petrov) 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. -- Sven Tanaka "There are 14 nodes and only 10 countries. Count again." Commodore Amiga 500 (1MB OCS) / Linux 1.2.13