From btanaka@utexas.edu Sun May 15 12:19:37 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!utexas!btanaka From: btanaka@utexas.edu (Brian Tanaka) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994May15.121937.4176@utexas.edu> Date: Sun, 15 May 1994 12:19:37 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu 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. -- Brian Tanaka "Marcus is not one man." Macintosh IIfx / NEXTSTEP 3.3 From shernandez@rwth-aachen.de Mon May 16 18:53:37 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!rwth-aachen!shernandez From: shernandez@rwth-aachen.de (Seo-yeon Hernández) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994May16.185337.4050@rwth-aachen.de> Date: Mon, 16 May 1994 18:53:37 GMT References: <1994May15.121937.4176@utexas.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994May15.121937.4176@utexas.edu>, btanaka@utexas.edu (Brian Tanaka) 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? -- Seo-yeon Hernández Opinions expressed are solely my own and not those of RWTH Aachen Informatik. ------------------------------------------------------------ From pfournier@titech.ac.jp Wed May 18 15:46:37 1994 Path: ashpoly!cascade!brgate!saturno!titech!pfournier From: pfournier@titech.ac.jp (Pavel Fournier) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994May18.154637.1515@titech.ac.jp> Date: Wed, 18 May 1994 15:46:37 GMT References: <1994May15.121937.4176@utexas.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994May15.121937.4176@utexas.edu>, btanaka@utexas.edu (Brian Tanaka) writes: > 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'. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Pavel Fournier Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre. ------------------------------------------------------------