From jtakahashi@mindspring.com Fri Sep 01 16:51:33 1995 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!jtakahashi From: jtakahashi@mindspring.com (Jen Takahashi) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep01.165133.1291@mindspring.com> Date: Fri, 01 Sep 1995 16:51:33 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Jen Takahashi "Hardware is temporary. The signal survives." Decstation 5000/200 / FreeBSD 2.1 From jhernandez@netcom.com Sun Sep 03 10:50:33 1995 Path: ashpoly!cascade!brgate!saturno!netcom!jhernandez From: jhernandez@netcom.com (Jen Hernández) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep03.105033.6474@netcom.com> Date: Sun, 03 Sep 1995 10:50:33 GMT References: <1995Sep01.165133.1291@mindspring.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Sep01.165133.1291@mindspring.com>, jtakahashi@mindspring.com (Jen Takahashi) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Jen Hernández *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From hstewart@inria.fr Tue Sep 05 03:07:33 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!hstewart From: hstewart@inria.fr (Hugo Stewart) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep05.030733.2565@inria.fr> Date: Tue, 05 Sep 1995 03:07:33 GMT References: <1995Sep01.165133.1291@mindspring.com> <1995Sep03.105033.6474@netcom.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Sep03.105033.6474@netcom.com>, jhernandez@netcom.com (Jen Hernández) writes: > Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Hugo Stewart -- INRIA Rocquencourt "The hatch is open. Is anyone listening?" From arodriguez@cmu.edu Tue Sep 05 12:17:33 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!arodriguez From: arodriguez@cmu.edu (Astrid Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep05.121733.4499@cmu.edu> Date: Tue, 05 Sep 1995 12:17:33 GMT References: <1995Sep01.165133.1291@mindspring.com> <1995Sep03.105033.6474@netcom.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Sep03.105033.6474@netcom.com>, jhernandez@netcom.com (Jen Hernández) writes: > Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Astrid Rodríguez | arodriguez@cmu.edu PGP Key fingerprint: B250 C3F5 A114 C99C "Keep the channels open."