From mbrennan@cmu.edu Fri Feb 10 02:29:48 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!mbrennan From: mbrennan@cmu.edu (Marta Brennan) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb10.022948.5456@cmu.edu> Date: Fri, 10 Feb 1995 02:29:48 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu 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. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- === Marta Brennan === Dept of Electrical Engineering, Carnegie Mellon University School of CS "There are 14 nodes and only 10 countries. Count again." From tpark@cmu.edu Fri Feb 10 19:21:48 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!tpark From: tpark@cmu.edu (Takeshi Park) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb10.192148.5331@cmu.edu> Date: Fri, 10 Feb 1995 19:21:48 GMT References: <1995Feb10.022948.5456@cmu.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Feb10.022948.5456@cmu.edu>, mbrennan@cmu.edu (Marta Brennan) 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? -- Takeshi Park "Hold for relay." NeXTstation Turbo Color / NEXTSTEP 3.3 From lhernandez@tum.de Sun Feb 12 04:15:48 1995 Path: ashpoly!cascade!transat!ukc!fennimore!tum!lhernandez From: lhernandez@tum.de (Lucia Hernández) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb12.041548.8296@tum.de> Date: Sun, 12 Feb 1995 04:15:48 GMT References: <1995Feb10.022948.5456@cmu.edu> <1995Feb10.192148.5331@cmu.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Feb10.192148.5331@cmu.edu>, tpark@cmu.edu (Takeshi Park) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Lucia Hernández -- Technische Universität München "Hardware is temporary. The signal survives." From flarsson@tum.de Sun Feb 12 19:17:48 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!tum!flarsson From: flarsson@tum.de (Fiona Larsson) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb12.191748.9686@tum.de> Date: Sun, 12 Feb 1995 19:17:48 GMT References: <1995Feb10.022948.5456@cmu.edu> <1995Feb10.192148.5331@cmu.edu> <1995Feb12.041548.8296@tum.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Feb12.041548.8296@tum.de>, lhernandez@tum.de (Lucia Hernández) writes: > The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Fiona Larsson Tape trading list upon request. SASE required for international mail.