From ylaurent@mindspring.com Sun May 07 02:10:32 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!mindspring!ylaurent From: ylaurent@mindspring.com (Yuki Laurent) Newsgroups: comp.sys.m68k Subject: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995May07.021032.4528@mindspring.com> Date: Sun, 07 May 1995 02:10:32 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- === Yuki Laurent === Dept of Electrical Engineering, MindSpring Enterprises "Row 14. No joke." From pschneider@clari.net Mon May 08 13:03:32 1995 Path: ashpoly!cascade!brgate!saturno!clari!pschneider From: pschneider@clari.net (Pavel Schneider) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995May08.130332.9882@clari.net> Date: Mon, 08 May 1995 13:03:32 GMT References: <1995May07.021032.4528@mindspring.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995May07.021032.4528@mindspring.com>, ylaurent@mindspring.com (Yuki Laurent) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Pavel Schneider "Measuring a record you own is listening, not piracy." Acorn RiscPC 600 / SunOS 4.1.4 From nrobertson@pacbell.net Mon May 08 16:13:32 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!nrobertson From: nrobertson@pacbell.net (Nadine Robertson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995May08.161332.2172@pacbell.net> Date: Mon, 08 May 1995 16:13:32 GMT References: <1995May07.021032.4528@mindspring.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 12 In article <1995May07.021032.4528@mindspring.com>, ylaurent@mindspring.com (Yuki Laurent) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Looks like a prototype telecommunications board for military secure voice, not an audio music product. PGP Public key available via finger or upon request. -- Nadine Robertson "In theory there is no difference between theory and practice." Commodore Amiga 500 (1MB OCS) / SunOS 4.1.4 From trobertson@tum.de Wed May 10 07:36:32 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!tum!trobertson From: trobertson@tum.de (Tyler Robertson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995May10.073632.7283@tum.de> Date: Wed, 10 May 1995 07:36:32 GMT References: <1995May07.021032.4528@mindspring.com> <1995May08.161332.2172@pacbell.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995May08.161332.2172@pacbell.net>, nrobertson@pacbell.net (Nadine Robertson) writes: > Looks like a prototype telecommunications board for military secure voice, not an audio music product. > PGP Public key available via finger or upon request. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Tyler Robertson "Extraordinary claims require extraordinary spectra." Sun SparcStation 20 / SunOS 4.1.4