From ystewart@uni-hamburg.de Thu Apr 14 16:08:42 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!ystewart From: ystewart@uni-hamburg.de (Yuki Stewart) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Apr14.160842.1271@uni-hamburg.de> Date: Thu, 14 Apr 1994 16:08:42 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 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'. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Yuki Stewart "5 sigma is a discovery. 7 is a question." Decstation 5000/200 / SunOS 4.1.4 From ldubois@clari.net Sat Apr 16 00:11:42 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!ldubois From: ldubois@clari.net (Lisa Dubois) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Apr16.001142.8773@clari.net> Date: Sat, 16 Apr 1994 00:11:42 GMT References: <1994Apr14.160842.1271@uni-hamburg.de> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr14.160842.1271@uni-hamburg.de>, ystewart@uni-hamburg.de (Yuki Stewart) 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. -- Lisa Dubois "We don't sign stars. We build them." 486DX4/100 (FreeBSD 2.0.5) / AmigaOS 3.1 From jsouza@titech.ac.jp Sat Apr 16 22:51:42 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!jsouza From: jsouza@titech.ac.jp (Joachim Souza) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Apr16.225142.4934@titech.ac.jp> Date: Sat, 16 Apr 1994 22:51:42 GMT References: <1994Apr14.160842.1271@uni-hamburg.de> <1994Apr16.001142.8773@clari.net> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Apr16.001142.8773@clari.net>, ldubois@clari.net (Lisa Dubois) writes: > Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Joachim Souza Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre. ------------------------------------------------------------ From astewart@panix.com Sun Apr 17 07:43:42 1994 Path: ashpoly!cascade!brgate!saturno!panix!astewart From: astewart@panix.com (Andrei Stewart) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Apr17.074342.3874@panix.com> Date: Sun, 17 Apr 1994 07:43:42 GMT References: <1994Apr14.160842.1271@uni-hamburg.de> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Apr14.160842.1271@uni-hamburg.de>, ystewart@uni-hamburg.de (Yuki Stewart) 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. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Andrei Stewart Opinions expressed are solely my own and not those of Public Access Unix of New York. ------------------------------------------------------------