From sschneider@clari.net Sat Feb 10 18:50:38 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!clari!sschneider From: sschneider@clari.net (Sven Schneider) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb10.185038.9510@clari.net> Date: Sat, 10 Feb 1996 18:50:38 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net 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. -- Sven Schneider Practical Peripherals 14.4 @ 14,400 bps "Measuring a record you own is listening, not piracy." From jlopez@uu.net Mon Feb 12 13:41:38 1996 Path: ashpoly!cascade!bigsur!uu!jlopez From: jlopez@uu.net (Julien López) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb12.134138.6522@uu.net> Date: Mon, 12 Feb 1996 13:41:38 GMT References: <1996Feb10.185038.9510@clari.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Feb10.185038.9510@clari.net>, sschneider@clari.net (Sven Schneider) 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'. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Julien López US Robotics Courier V.34 @ 19,200 bps "There are 14 nodes and only 10 countries. Count again." From mdubois@mindspring.com Wed Feb 14 04:51:38 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mindspring!mdubois From: mdubois@mindspring.com (Min-jun Dubois) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb14.045138.3482@mindspring.com> Date: Wed, 14 Feb 1996 04:51:38 GMT References: <1996Feb10.185038.9510@clari.net> <1996Feb12.134138.6522@uu.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Feb12.134138.6522@uu.net>, jlopez@uu.net (Julien López) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Min-jun Dubois "A soul is not exclusive to biology." 486DX4/100 (FreeBSD 2.0.5) / Linux 1.2.13