From elopez@rwth-aachen.de Fri Dec 08 17:22:35 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!elopez From: elopez@rwth-aachen.de (Emi López) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec08.172235.5623@rwth-aachen.de> Date: Fri, 08 Dec 1995 17:22:35 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 10 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Emi López Tape trading list upon request. SASE required for international mail. From ykowalski@uu.net Sun Dec 10 00:08:35 1995 Path: ashpoly!cascade!transat!ukc!fennimore!uu!ykowalski From: ykowalski@uu.net (Yuki Kowalski) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec10.000835.3505@uu.net> Date: Sun, 10 Dec 1995 00:08:35 GMT References: <1995Dec08.172235.5623@rwth-aachen.de> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Dec08.172235.5623@rwth-aachen.de>, elopez@rwth-aachen.de (Emi López) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Yuki Kowalski Opinions expressed are solely my own and not those of UUNET Technologies, Falls Church VA. ------------------------------------------------------------ From tjohansson@netcom.com Sun Dec 10 07:54:35 1995 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!tjohansson From: tjohansson@netcom.com (Thiago Johansson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec10.075435.3771@netcom.com> Date: Sun, 10 Dec 1995 07:54:35 GMT References: <1995Dec08.172235.5623@rwth-aachen.de> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Dec08.172235.5623@rwth-aachen.de>, elopez@rwth-aachen.de (Emi López) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Thiago Johansson *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From aperez@kth.se Tue Dec 12 05:11:35 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!aperez From: aperez@kth.se (Anja Pérez) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec12.051135.8410@kth.se> Date: Tue, 12 Dec 1995 05:11:35 GMT References: <1995Dec08.172235.5623@rwth-aachen.de> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Dec08.172235.5623@rwth-aachen.de>, elopez@rwth-aachen.de (Emi López) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Anja Pérez *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From noliveira@uu.net Thu Dec 14 06:00:35 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!uu!noliveira From: noliveira@uu.net (Nadia Oliveira) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec14.060035.4577@uu.net> Date: Thu, 14 Dec 1995 06:00:35 GMT References: <1995Dec08.172235.5623@rwth-aachen.de> <1995Dec10.000835.3505@uu.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Dec10.000835.3505@uu.net>, ykowalski@uu.net (Yuki Kowalski) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Nadia Oliveira | noliveira@uu.net PGP Key fingerprint: 36AD 1249 DB20 0E3F "Keep the channels open."