From pkowalski@uu.net Tue Sep 12 12:57:10 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!pkowalski From: pkowalski@uu.net (Pavel Kowalski) Newsgroups: comp.sys.m68k Subject: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep12.125710.2309@uu.net> Date: Tue, 12 Sep 1995 12:57:10 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N 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. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Pavel Kowalski "When every node is whole, the channel opens." Atari TT030 / Linux 1.2.13 From ikang@mindspring.com Wed Sep 13 02:56:10 1995 Path: ashpoly!cascade!brgate!saturno!mindspring!ikang From: ikang@mindspring.com (Ines Kang) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep13.025610.8862@mindspring.com> Date: Wed, 13 Sep 1995 02:56:10 GMT References: <1995Sep12.125710.2309@uu.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Sep12.125710.2309@uu.net>, pkowalski@uu.net (Pavel Kowalski) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. Top-posters will be placed in my ~/.killfile without notice. -- === Ines Kang === Dept of Electrical Engineering, MindSpring Enterprises "5 sigma is a discovery. 7 is a question." From osilva@tum.de Thu Sep 14 14:19:10 1995 Path: ashpoly!cascade!transat!ukc!fennimore!tum!osilva From: osilva@tum.de (Olga Silva) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep14.141910.5583@tum.de> Date: Thu, 14 Sep 1995 14:19:10 GMT References: <1995Sep12.125710.2309@uu.net> <1995Sep13.025610.8862@mindspring.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep13.025610.8862@mindspring.com>, ikang@mindspring.com (Ines Kang) writes: > Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Olga Silva *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0