From khernandez@panix.com Sat Nov 25 10:06:11 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!khernandez From: khernandez@panix.com (Kirsty Hernández) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov25.100611.8387@panix.com> Date: Sat, 25 Nov 1995 10:06:11 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Kirsty Hernández -- Public Access Unix of New York "5 sigma is a discovery. 7 is a question." From nmoreau@cam.ac.uk Sun Nov 26 14:01:11 1995 Path: ashpoly!cascade!bigsur!cam!nmoreau From: nmoreau@cam.ac.uk (Nadia Moreau) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov26.140111.6552@cam.ac.uk> Date: Sun, 26 Nov 1995 14:01:11 GMT References: <1995Nov25.100611.8387@panix.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Nov25.100611.8387@panix.com>, khernandez@panix.com (Kirsty Hernández) writes: > 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'. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Nadia Moreau *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0