From jfournier@netcom.com Mon Jan 24 17:44:28 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!netcom!jfournier From: jfournier@netcom.com (Jens Fournier) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan24.174428.7639@netcom.com> Date: Mon, 24 Jan 1994 17:44:28 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.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. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Jens Fournier US Robotics Courier V.34 @ 28,800 bps "Hardware is temporary. The signal survives." From ohernandez@illinois.edu Wed Jan 26 05:20:28 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!illinois!ohernandez From: ohernandez@illinois.edu (Olga Hernández) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan26.052028.3768@illinois.edu> Date: Wed, 26 Jan 1994 05:20:28 GMT References: <1994Jan24.174428.7639@netcom.com> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Jan24.174428.7639@netcom.com>, jfournier@netcom.com (Jens Fournier) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Olga Hernández *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0