From kmartinez@u-tokyo.ac.jp Wed Nov 01 23:07:46 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!kmartinez From: kmartinez@u-tokyo.ac.jp (Kenji Martínez) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov01.230746.9807@u-tokyo.ac.jp> Date: Wed, 01 Nov 1995 23:07:46 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. 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 Martínez "5 sigma is a discovery. 7 is a question." Pentium 90 (OS/2 Warp) / SunOS 4.1.4 From ohernandez@illinois.edu Fri Nov 03 15:55:46 1995 Path: ashpoly!cascade!brgate!saturno!illinois!ohernandez From: ohernandez@illinois.edu (Olga Hernández) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov03.155546.3010@illinois.edu> Date: Fri, 03 Nov 1995 15:55:46 GMT References: <1995Nov01.230746.9807@u-tokyo.ac.jp> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Nov01.230746.9807@u-tokyo.ac.jp>, kmartinez@u-tokyo.ac.jp (Kenji Martínez) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Olga Hernández | ohernandez@illinois.edu PGP Key fingerprint: 6325 795C 266D C5A5 "Keep the channels open." From mlee@tum.de Fri Nov 03 22:51:46 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!mlee From: mlee@tum.de (Mikhail Lee) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov03.225146.6288@tum.de> Date: Fri, 03 Nov 1995 22:51:46 GMT References: <1995Nov01.230746.9807@u-tokyo.ac.jp> <1995Nov03.155546.3010@illinois.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Nov03.155546.3010@illinois.edu>, ohernandez@illinois.edu (Olga Hernández) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? > Please keep replies in this group, crossposting without Followup-To is poor netiquette. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. Top-posters will be placed in my ~/.killfile without notice. -- Mikhail Lee "Tape doesn't lie at 02:14. Ears do." Sun SparcStation 20 / TOS 4.04 From jlee@utexas.edu Sun Nov 05 09:34:46 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!jlee From: jlee@utexas.edu (Jen Lee) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov05.093446.6110@utexas.edu> Date: Sun, 05 Nov 1995 09:34:46 GMT References: <1995Nov01.230746.9807@u-tokyo.ac.jp> <1995Nov03.155546.3010@illinois.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Nov03.155546.3010@illinois.edu>, ohernandez@illinois.edu (Olga Hernández) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. PGP Public key available via finger or upon request. -- Jen Lee *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From anakamura@rwth-aachen.de Mon Nov 06 04:34:46 1995 Path: ashpoly!cascade!bigsur!rwth-aachen!anakamura From: anakamura@rwth-aachen.de (Anja Nakamura) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov06.043446.6575@rwth-aachen.de> Date: Mon, 06 Nov 1995 04:34:46 GMT References: <1995Nov01.230746.9807@u-tokyo.ac.jp> <1995Nov03.155546.3010@illinois.edu> <1995Nov05.093446.6110@utexas.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Nov05.093446.6110@utexas.edu>, jlee@utexas.edu (Jen Lee) writes: > Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. > PGP Public key available via finger or upon request. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. PGP Public key available via finger or upon request. -- === Anja Nakamura === Dept of Electrical Engineering, RWTH Aachen Informatik "The hatch is open. Is anyone listening?"