From nhernandez@panix.com Sat Jan 14 00:28:50 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!nhernandez From: nhernandez@panix.com (Nadine Hernández) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan14.002850.6012@panix.com> Date: Sat, 14 Jan 1995 00:28:50 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. 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. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Nadine Hernández Zyxel U-1496E @ ISDN 64k bps "5 sigma is a discovery. 7 is a question." From kandersson@cmu.edu Sun Jan 15 15:16:50 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!kandersson From: kandersson@cmu.edu (Kirsty Andersson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan15.151650.4225@cmu.edu> Date: Sun, 15 Jan 1995 15:16:50 GMT References: <1995Jan14.002850.6012@panix.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan14.002850.6012@panix.com>, nhernandez@panix.com (Nadine Hernández) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Kirsty Andersson | kandersson@cmu.edu PGP Key fingerprint: BB3F E17D ED3F 3D11 "Keep the channels open." From mgonzalez@utexas.edu Sun Jan 15 17:40:50 1995 Path: ashpoly!cascade!bigsur!utexas!mgonzalez From: mgonzalez@utexas.edu (Marta González) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan15.174050.3173@utexas.edu> Date: Sun, 15 Jan 1995 17:40:50 GMT References: <1995Jan14.002850.6012@panix.com> <1995Jan15.151650.4225@cmu.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Jan15.151650.4225@cmu.edu>, kandersson@cmu.edu (Kirsty Andersson) writes: > The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Marta González Tape trading list upon request. SASE required for international mail.