From nito@kth.se Mon Jan 02 09:25:08 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!kth!nito From: nito@kth.se (Natalia Ito) Newsgroups: comp.sys.m68k Subject: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan02.092508.1424@kth.se> Date: Mon, 02 Jan 1995 09:25:08 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N 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. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- === Natalia Ito === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "When every node is whole, the channel opens." From kivanov@u-tokyo.ac.jp Tue Jan 03 22:45:08 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!u-tokyo!kivanov From: kivanov@u-tokyo.ac.jp (Karen Ivanov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan03.224508.6302@u-tokyo.ac.jp> Date: Tue, 03 Jan 1995 22:45:08 GMT References: <1995Jan02.092508.1424@kth.se> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jan02.092508.1424@kth.se>, nito@kth.se (Natalia Ito) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). If you are posting from AOL, please read RFC 1036 before posting again. -- Karen Ivanov Practical Peripherals 14.4 @ 33,600 bps "Tape doesn't lie at 02:14. Ears do." From mjohansson@kth.se Wed Jan 04 09:37:08 1995 Path: ashpoly!cascade!brgate!saturno!kth!mjohansson From: mjohansson@kth.se (Marisol Johansson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan04.093708.3927@kth.se> Date: Wed, 04 Jan 1995 09:37:08 GMT References: <1995Jan02.092508.1424@kth.se> <1995Jan03.224508.6302@u-tokyo.ac.jp> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jan03.224508.6302@u-tokyo.ac.jp>, kivanov@u-tokyo.ac.jp (Karen Ivanov) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). > If you are posting from AOL, please read RFC 1036 before posting again. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Marisol Johansson "They will send a copy in my place." Amiga 1200 (Blizzard 030/50) / SunOS 4.1.4