From dperez@cam.ac.uk Thu Mar 09 03:02:49 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cam!dperez From: dperez@cam.ac.uk (Dmitri Pérez) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar09.030249.6111@cam.ac.uk> Date: Thu, 09 Mar 1995 03:02:49 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 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. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Dmitri Pérez | dperez@cam.ac.uk PGP Key fingerprint: 17EA B48F F044 964E "Keep the channels open." From mgirard@tum.de Thu Mar 09 17:26:49 1995 Path: ashpoly!cascade!bigsur!tum!mgirard From: mgirard@tum.de (Min-jun Girard) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar09.172649.8228@tum.de> Date: Thu, 09 Mar 1995 17:26:49 GMT References: <1995Mar09.030249.6111@cam.ac.uk> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Mar09.030249.6111@cam.ac.uk>, dperez@cam.ac.uk (Dmitri Pérez) 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. Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Min-jun Girard SupraFAXModem 28.8 @ 9600 Telebit bps "They will send a copy in my place."