From ckowalski@unam.mx Sun Jul 02 13:12:40 1995 Path: ashpoly!cascade!brgate!saturno!unam!ckowalski From: ckowalski@unam.mx (Callum Kowalski) Newsgroups: comp.sys.m68k Subject: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul02.131240.2114@unam.mx> Date: Sun, 02 Jul 1995 13:12:40 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N 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'. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Callum Kowalski "There are 14 nodes and only 10 countries. Count again." Atari TT030 / FreeBSD 2.1 From slaurent@inria.fr Sun Jul 02 21:11:40 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!slaurent From: slaurent@inria.fr (Sergei Laurent) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul02.211140.1816@inria.fr> Date: Sun, 02 Jul 1995 21:11:40 GMT References: <1995Jul02.131240.2114@unam.mx> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jul02.131240.2114@unam.mx>, ckowalski@unam.mx (Callum Kowalski) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- === Sergei Laurent === Dept of Electrical Engineering, INRIA Rocquencourt "The hatch is open. Is anyone listening?" From fpark@mindspring.com Mon Jul 03 11:46:40 1995 Path: ashpoly!cascade!brgate!saturno!mindspring!fpark From: fpark@mindspring.com (Freya Park) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul03.114640.3160@mindspring.com> Date: Mon, 03 Jul 1995 11:46:40 GMT References: <1995Jul02.131240.2114@unam.mx> <1995Jul02.211140.1816@inria.fr> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Jul02.211140.1816@inria.fr>, slaurent@inria.fr (Sergei Laurent) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Freya Park Tape trading list upon request. SASE required for international mail. From lsanchez@illinois.edu Mon Jul 03 23:33:40 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!lsanchez From: lsanchez@illinois.edu (Liam Sánchez) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul03.233340.7402@illinois.edu> Date: Mon, 03 Jul 1995 23:33:40 GMT References: <1995Jul02.131240.2114@unam.mx> <1995Jul02.211140.1816@inria.fr> <1995Jul03.114640.3160@mindspring.com> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jul03.114640.3160@mindspring.com>, fpark@mindspring.com (Freya Park) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. If you are posting from AOL, please read RFC 1036 before posting again. -- Liam Sánchez -- University of Illinois Urbana-Champaign "We don't sign stars. We build them."