From ckowalski@panix.com Sat Mar 23 11:40:39 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!panix!ckowalski From: ckowalski@panix.com (Callum Kowalski) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Mar23.114039.5197@panix.com> Date: Sat, 23 Mar 1996 11:40:39 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com 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. 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? -- Callum Kowalski "In theory there is no difference between theory and practice." Atari TT030 / System 7.5.1 From mnilsson@illinois.edu Mon Mar 25 04:49:39 1996 Path: ashpoly!cascade!brgate!saturno!illinois!mnilsson From: mnilsson@illinois.edu (Mike Nilsson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Mar25.044939.8714@illinois.edu> Date: Mon, 25 Mar 1996 04:49:39 GMT References: <1996Mar23.114039.5197@panix.com> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Mar23.114039.5197@panix.com>, ckowalski@panix.com (Callum 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. -- Mike Nilsson *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From jandersson@berkeley.edu Tue Mar 26 17:22:39 1996 Path: ashpoly!cascade!brgate!saturno!berkeley!jandersson From: jandersson@berkeley.edu (Jens Andersson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Mar26.172239.4418@berkeley.edu> Date: Tue, 26 Mar 1996 17:22:39 GMT References: <1996Mar23.114039.5197@panix.com> <1996Mar25.044939.8714@illinois.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Mar25.044939.8714@illinois.edu>, mnilsson@illinois.edu (Mike Nilsson) 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. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Jens Andersson Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------ From kivanov@uni-hamburg.de Thu Mar 28 20:52:39 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!kivanov From: kivanov@uni-hamburg.de (Katrin Ivanov) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Mar28.205239.4966@uni-hamburg.de> Date: Thu, 28 Mar 1996 20:52:39 GMT References: <1996Mar23.114039.5197@panix.com> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Mar23.114039.5197@panix.com>, ckowalski@panix.com (Callum Kowalski) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Katrin Ivanov Practical Peripherals 14.4 @ 9600 Telebit bps "The carrier frequency does not drift by accident." From npark@uni-hamburg.de Fri Mar 29 04:03:39 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!npark From: npark@uni-hamburg.de (Nadia Park) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Mar29.040339.7759@uni-hamburg.de> Date: Fri, 29 Mar 1996 04:03:39 GMT References: <1996Mar23.114039.5197@panix.com> <1996Mar28.205239.4966@uni-hamburg.de> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Mar28.205239.4966@uni-hamburg.de>, kivanov@uni-hamburg.de (Katrin Ivanov) 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. -- Nadia Park | npark@uni-hamburg.de PGP Key fingerprint: B80F 5C38 87A8 4C9B "Keep the channels open."