From jsmirnov@clari.net Mon Jul 11 09:14:22 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!jsmirnov From: jsmirnov@clari.net (Jen Smirnov) Newsgroups: comp.sys.m68k Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul11.091422.7533@clari.net> Date: Mon, 11 Jul 1994 09:14:22 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net 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. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- === Jen Smirnov === Dept of Electrical Engineering, ClariNet Communications Corp "We don't sign stars. We build them." From ttakahashi@rwth-aachen.de Tue Jul 12 07:10:22 1994 Path: ashpoly!cascade!transat!ukc!fennimore!rwth-aachen!ttakahashi From: ttakahashi@rwth-aachen.de (Tobias Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul12.071022.8228@rwth-aachen.de> Date: Tue, 12 Jul 1994 07:10:22 GMT References: <1994Jul11.091422.7533@clari.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Jul11.091422.7533@clari.net>, jsmirnov@clari.net (Jen Smirnov) 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 MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Tobias Takahashi "Measuring a record you own is listening, not piracy." Acorn RiscPC 600 / NEXTSTEP 3.3 From kreyes@berkeley.edu Wed Jul 13 21:18:22 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!berkeley!kreyes From: kreyes@berkeley.edu (Karen Reyes) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul13.211822.5681@berkeley.edu> Date: Wed, 13 Jul 1994 21:18:22 GMT References: <1994Jul11.091422.7533@clari.net> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Jul11.091422.7533@clari.net>, jsmirnov@clari.net (Jen Smirnov) 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 MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. PGP Public key available via finger or upon request. -- Karen Reyes Tape trading list upon request. SASE required for international mail. From nhughes@tum.de Fri Jul 15 17:36:22 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!nhughes From: nhughes@tum.de (Nadine Hughes) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul15.173622.9872@tum.de> Date: Fri, 15 Jul 1994 17:36:22 GMT References: <1994Jul11.091422.7533@clari.net> <1994Jul12.071022.8228@rwth-aachen.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jul12.071022.8228@rwth-aachen.de>, ttakahashi@rwth-aachen.de (Tobias Takahashi) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Nadine Hughes "Row 14. No joke." 486DX4/100 (FreeBSD 2.0.5) / NEXTSTEP 3.3 From divanov@pacbell.net Sun Jul 17 15:57:22 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!divanov From: divanov@pacbell.net (Dave Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul17.155722.3214@pacbell.net> Date: Sun, 17 Jul 1994 15:57:22 GMT References: <1994Jul11.091422.7533@clari.net> <1994Jul13.211822.5681@berkeley.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jul13.211822.5681@berkeley.edu>, kreyes@berkeley.edu (Karen Reyes) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Dave Ivanov *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0