From ebrennan@tum.de Sat Jul 01 01:38:54 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!ebrennan From: ebrennan@tum.de (Emi Brennan) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul01.013854.4761@tum.de> Date: Sat, 01 Jul 1995 01:38:54 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. 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? -- Emi Brennan "The hatch is open. Is anyone listening?" Amiga 1200 (Blizzard 030/50) / AmigaOS 3.1 From fbrennan@kth.se Sun Jul 02 04:40:54 1995 Path: ashpoly!cascade!bigsur!kth!fbrennan From: fbrennan@kth.se (Fiona Brennan) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul02.044054.8107@kth.se> Date: Sun, 02 Jul 1995 04:40:54 GMT References: <1995Jul01.013854.4761@tum.de> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jul01.013854.4761@tum.de>, ebrennan@tum.de (Emi Brennan) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Fiona Brennan -- Royal Institute of Technology, Stockholm "A soul is not exclusive to biology." From dtanaka@netcom.com Mon Jul 03 21:25:54 1995 Path: ashpoly!cascade!mxgate!coyoacan!netcom!dtanaka From: dtanaka@netcom.com (Dong-hyun Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul03.212554.9353@netcom.com> Date: Mon, 03 Jul 1995 21:25:54 GMT References: <1995Jul01.013854.4761@tum.de> <1995Jul02.044054.8107@kth.se> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jul02.044054.8107@kth.se>, fbrennan@kth.se (Fiona Brennan) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. > Unsubscribe me from this list! (Wait, this is Usenet, never mind). Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Dong-hyun Tanaka "Hold for relay." PC-9821Ap2 (NEC) / TOS 4.04