From tramirez@cern.ch Sat Aug 13 00:15:15 1994 Path: ashpoly!cascade!transat!ukc!fennimore!cern!tramirez From: tramirez@cern.ch (Tobias Ramírez) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug13.001515.2533@cern.ch> Date: Sat, 13 Aug 1994 00:15:15 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 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. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- === Tobias Ramírez === Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva "In theory there is no difference between theory and practice." From ilindqvist@cern.ch Sat Aug 13 17:19:15 1994 Path: ashpoly!cascade!brgate!saturno!cern!ilindqvist From: ilindqvist@cern.ch (Ines Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug13.171915.8343@cern.ch> Date: Sat, 13 Aug 1994 17:19:15 GMT References: <1994Aug13.001515.2533@cern.ch> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Aug13.001515.2533@cern.ch>, tramirez@cern.ch (Tobias Ramírez) writes: > 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. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Ines Lindqvist *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From mhernandez@purdue.edu Sun Aug 14 04:39:15 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!purdue!mhernandez From: mhernandez@purdue.edu (Min-jun Hernández) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug14.043915.9873@purdue.edu> Date: Sun, 14 Aug 1994 04:39:15 GMT References: <1994Aug13.001515.2533@cern.ch> <1994Aug13.171915.8343@cern.ch> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Aug13.171915.8343@cern.ch>, ilindqvist@cern.ch (Ines Lindqvist) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Min-jun Hernández | mhernandez@purdue.edu PGP Key fingerprint: 3B62 44D7 9F32 A54E "Keep the channels open." From mnilsson@mindspring.com Sun Aug 14 06:51:15 1994 Path: ashpoly!cascade!bigsur!mindspring!mnilsson From: mnilsson@mindspring.com (Morag Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug14.065115.7578@mindspring.com> Date: Sun, 14 Aug 1994 06:51:15 GMT References: <1994Aug13.001515.2533@cern.ch> <1994Aug13.171915.8343@cern.ch> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Aug13.171915.8343@cern.ch>, ilindqvist@cern.ch (Ines Lindqvist) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Morag Nilsson "Marcus is not one man." 486DX4/100 (FreeBSD 2.0.5) / System 7.5.1 From lpopov@delphi.com Sun Aug 14 09:56:15 1994 Path: ashpoly!cascade!bigsur!delphi!lpopov From: lpopov@delphi.com (Lars Popov) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug14.095615.9279@delphi.com> Date: Sun, 14 Aug 1994 09:56:15 GMT References: <1994Aug13.001515.2533@cern.ch> <1994Aug13.171915.8343@cern.ch> <1994Aug14.043915.9873@purdue.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Aug14.043915.9873@purdue.edu>, mhernandez@purdue.edu (Min-jun Hernández) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Lars Popov US Robotics Courier V.34 @ ISDN 64k bps "Extraordinary claims require extraordinary spectra."