From kkuznetsov@rwth-aachen.de Thu Mar 09 04:53:48 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!kkuznetsov From: kkuznetsov@rwth-aachen.de (Kenji Kuznetsov) Newsgroups: comp.sys.m68k Subject: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar09.045348.5986@rwth-aachen.de> Date: Thu, 09 Mar 1995 04:53:48 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 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. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Kenji Kuznetsov "In theory there is no difference between theory and practice." 486DX4/100 (FreeBSD 2.0.5) / FreeBSD 2.1 From rnilsson@kth.se Thu Mar 09 21:44:48 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!kth!rnilsson From: rnilsson@kth.se (Raj Nilsson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar09.214448.2222@kth.se> Date: Thu, 09 Mar 1995 21:44:48 GMT References: <1995Mar09.045348.5986@rwth-aachen.de> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Mar09.045348.5986@rwth-aachen.de>, kkuznetsov@rwth-aachen.de (Kenji Kuznetsov) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Raj Nilsson "The carrier frequency does not drift by accident." Acorn RiscPC 600 / SunOS 4.1.4 From dsuzuki@illinois.edu Fri Mar 10 13:22:48 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!dsuzuki From: dsuzuki@illinois.edu (Dong-hyun Suzuki) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar10.132248.9877@illinois.edu> Date: Fri, 10 Mar 1995 13:22:48 GMT References: <1995Mar09.045348.5986@rwth-aachen.de> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Mar09.045348.5986@rwth-aachen.de>, kkuznetsov@rwth-aachen.de (Kenji Kuznetsov) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Dong-hyun Suzuki "Do not worship the copy." Amiga 3000T / TOS 4.04 From jmuller@titech.ac.jp Sat Mar 11 17:25:48 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!jmuller From: jmuller@titech.ac.jp (Ji-woo Müller) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar11.172548.6211@titech.ac.jp> Date: Sat, 11 Mar 1995 17:25:48 GMT References: <1995Mar09.045348.5986@rwth-aachen.de> <1995Mar09.214448.2222@kth.se> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Mar09.214448.2222@kth.se>, rnilsson@kth.se (Raj Nilsson) writes: > Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- === Ji-woo Müller === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "The hatch is open. Is anyone listening?"