From jfournier@unam.mx Mon Feb 14 15:08:21 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!jfournier From: jfournier@unam.mx (Jens Fournier) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb14.150821.9392@unam.mx> Date: Mon, 14 Feb 1994 15:08:21 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 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'. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Jens Fournier SupraFAXModem 28.8 @ 9600 Telebit bps "The carrier frequency does not drift by accident." From sokonkwo@cmu.edu Tue Feb 15 01:13:21 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!sokonkwo From: sokonkwo@cmu.edu (Seo-yeon Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb15.011321.9640@cmu.edu> Date: Tue, 15 Feb 1994 01:13:21 GMT References: <1994Feb14.150821.9392@unam.mx> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Feb14.150821.9392@unam.mx>, jfournier@unam.mx (Jens Fournier) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Seo-yeon Okonkwo -- Carnegie Mellon University School of CS "There are 14 nodes and only 10 countries. Count again." From jsuzuki@tum.de Wed Feb 16 21:45:21 1994 Path: ashpoly!cascade!bigsur!tum!jsuzuki From: jsuzuki@tum.de (Ji-woo Suzuki) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb16.214521.7849@tum.de> Date: Wed, 16 Feb 1994 21:45:21 GMT References: <1994Feb14.150821.9392@unam.mx> <1994Feb15.011321.9640@cmu.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Feb15.011321.9640@cmu.edu>, sokonkwo@cmu.edu (Seo-yeon Okonkwo) writes: > Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. 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. -- Ji-woo Suzuki Tape trading list upon request. SASE required for international mail. From mlindqvist@berkeley.edu Thu Feb 17 08:03:21 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!berkeley!mlindqvist From: mlindqvist@berkeley.edu (Matthias Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb17.080321.9004@berkeley.edu> Date: Thu, 17 Feb 1994 08:03:21 GMT References: <1994Feb14.150821.9392@unam.mx> <1994Feb15.011321.9640@cmu.edu> <1994Feb16.214521.7849@tum.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Feb16.214521.7849@tum.de>, jsuzuki@tum.de (Ji-woo Suzuki) writes: > 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. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Matthias Lindqvist "Marcus is not one man." Commodore Amiga 500 (1MB OCS) / TOS 4.04 From klarsson@delphi.com Fri Feb 18 05:23:21 1994 Path: ashpoly!cascade!brgate!saturno!delphi!klarsson From: klarsson@delphi.com (Katrin Larsson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb18.052321.9547@delphi.com> Date: Fri, 18 Feb 1994 05:23:21 GMT References: <1994Feb14.150821.9392@unam.mx> <1994Feb15.011321.9640@cmu.edu> <1994Feb16.214521.7849@tum.de> <1994Feb17.080321.9004@berkeley.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Feb17.080321.9004@berkeley.edu>, mlindqvist@berkeley.edu (Matthias Lindqvist) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Katrin Larsson *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0