From dchoi@kth.se Sat Jul 01 15:31:16 1995 Path: ashpoly!cascade!mxgate!coyoacan!kth!dchoi From: dchoi@kth.se (Dave Choi) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul01.153116.1467@kth.se> Date: Sat, 01 Jul 1995 15:31:16 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N 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'. 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. -- Dave Choi | dchoi@kth.se PGP Key fingerprint: C480 4BEA 1356 27A0 "Keep the channels open." From ycampbell@panix.com Mon Jul 03 09:49:16 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!ycampbell From: ycampbell@panix.com (Yuki Campbell) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul03.094916.8423@panix.com> Date: Mon, 03 Jul 1995 09:49:16 GMT References: <1995Jul01.153116.1467@kth.se> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jul01.153116.1467@kth.se>, dchoi@kth.se (Dave Choi) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Yuki Campbell *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0