From tfischer@kth.se Wed Aug 24 20:24:46 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!tfischer From: tfischer@kth.se (Tomas Fischer) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug24.202446.8179@kth.se> Date: Wed, 24 Aug 1994 20:24:46 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 10 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. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Tomas Fischer Tape trading list upon request. SASE required for international mail. From jnakamura@earthlink.net Fri Aug 26 10:58:46 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!earthlink!jnakamura From: jnakamura@earthlink.net (Jens Nakamura) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug26.105846.2350@earthlink.net> Date: Fri, 26 Aug 1994 10:58:46 GMT References: <1994Aug24.202446.8179@kth.se> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Aug24.202446.8179@kth.se>, tfischer@kth.se (Tomas Fischer) 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. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Jens Nakamura SupraFAXModem 28.8 @ 14,400 bps "The hatch is open. Is anyone listening?"