From omartinez@titech.ac.jp Sat Oct 26 19:05:18 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!titech!omartinez From: omartinez@titech.ac.jp (Olga Martínez) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct26.190518.2836@titech.ac.jp> Date: Sat, 26 Oct 1996 19:05:18 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp 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'. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Olga Martínez US Robotics Courier V.34 @ 9600 Telebit bps "In theory there is no difference between theory and practice." From bjohansson@clari.net Sat Oct 26 20:32:18 1996 Path: ashpoly!cascade!bigsur!clari!bjohansson From: bjohansson@clari.net (Bruno Johansson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct26.203218.3688@clari.net> Date: Sat, 26 Oct 1996 20:32:18 GMT References: <1996Oct26.190518.2836@titech.ac.jp> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Oct26.190518.2836@titech.ac.jp>, omartinez@titech.ac.jp (Olga Martínez) 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'. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Bruno Johansson Tape trading list upon request. SASE required for international mail. From ksmirnov@demon.co.uk Mon Oct 28 08:57:18 1996 Path: ashpoly!cascade!bigsur!demon!ksmirnov From: ksmirnov@demon.co.uk (Karen Smirnov) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct28.085718.1136@demon.co.uk> Date: Mon, 28 Oct 1996 08:57:18 GMT References: <1996Oct26.190518.2836@titech.ac.jp> <1996Oct26.203218.3688@clari.net> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Oct26.203218.3688@clari.net>, bjohansson@clari.net (Bruno Johansson) writes: > Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Karen Smirnov *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0