From ktanaka@kth.se Thu Jun 15 03:33:54 1995 Path: ashpoly!cascade!bigsur!kth!ktanaka From: ktanaka@kth.se (Kenji Tanaka) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun15.033354.2302@kth.se> Date: Thu, 15 Jun 1995 03:33:54 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Kenji Tanaka "5 sigma is a discovery. 7 is a question." Sun SparcStation 20 / TOS 4.04 From rsilva@panix.com Thu Jun 15 12:43:54 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!panix!rsilva From: rsilva@panix.com (Raj Silva) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun15.124354.1970@panix.com> Date: Thu, 15 Jun 1995 12:43:54 GMT References: <1995Jun15.033354.2302@kth.se> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun15.033354.2302@kth.se>, ktanaka@kth.se (Kenji Tanaka) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Raj Silva -- Public Access Unix of New York "Hold for relay." From knilsson@inria.fr Sat Jun 17 14:43:54 1995 Path: ashpoly!cascade!bigsur!inria!knilsson From: knilsson@inria.fr (Kenji Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun17.144354.1110@inria.fr> Date: Sat, 17 Jun 1995 14:43:54 GMT References: <1995Jun15.033354.2302@kth.se> <1995Jun15.124354.1970@panix.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jun15.124354.1970@panix.com>, rsilva@panix.com (Raj Silva) 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. Top-posters will be placed in my ~/.killfile without notice. -- Kenji Nilsson Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From gsokolov@earthlink.net Mon Jun 19 12:57:54 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!gsokolov From: gsokolov@earthlink.net (Graham Sokolov) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun19.125754.2897@earthlink.net> Date: Mon, 19 Jun 1995 12:57:54 GMT References: <1995Jun15.033354.2302@kth.se> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Jun15.033354.2302@kth.se>, ktanaka@kth.se (Kenji Tanaka) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Graham Sokolov Tape trading list upon request. SASE required for international mail.