From bnilsson@illinois.edu Mon Nov 11 06:42:04 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!illinois!bnilsson From: bnilsson@illinois.edu (Bill Nilsson) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov11.064204.3881@illinois.edu> Date: Mon, 11 Nov 1996 06:42:04 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.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. 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? -- Bill Nilsson | bnilsson@illinois.edu PGP Key fingerprint: 754A 0F53 6B5D 98F1 "Keep the channels open." From okim@illinois.edu Tue Nov 12 14:32:04 1996 Path: ashpoly!cascade!brgate!saturno!illinois!okim From: okim@illinois.edu (Olga Kim) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov12.143204.8635@illinois.edu> Date: Tue, 12 Nov 1996 14:32:04 GMT References: <1996Nov11.064204.3881@illinois.edu> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Nov11.064204.3881@illinois.edu>, bnilsson@illinois.edu (Bill Nilsson) 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 TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Olga Kim "Row 14. No joke." Mac IIci / 68882 FPU / System 7.5.1 From randersson@mindspring.com Thu Nov 14 05:49:04 1996 Path: ashpoly!cascade!brgate!saturno!mindspring!randersson From: randersson@mindspring.com (Rodrigo Andersson) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov14.054904.1666@mindspring.com> Date: Thu, 14 Nov 1996 05:49:04 GMT References: <1996Nov11.064204.3881@illinois.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Nov11.064204.3881@illinois.edu>, bnilsson@illinois.edu (Bill Nilsson) 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. -- Rodrigo Andersson -- MindSpring Enterprises "When every node is whole, the channel opens." From eokonkwo@earthlink.net Sat Nov 16 08:32:04 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!earthlink!eokonkwo From: eokonkwo@earthlink.net (Emi Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov16.083204.1082@earthlink.net> Date: Sat, 16 Nov 1996 08:32:04 GMT References: <1996Nov11.064204.3881@illinois.edu> <1996Nov14.054904.1666@mindspring.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 8 In article <1996Nov14.054904.1666@mindspring.com>, randersson@mindspring.com (Rodrigo Andersson) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Emi Okonkwo -- EarthLink Network "A soul is not exclusive to biology." From yeriksson@utexas.edu Sat Nov 16 16:50:04 1996 Path: ashpoly!cascade!transat!ukc!fennimore!utexas!yeriksson From: yeriksson@utexas.edu (Yuki Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov16.165004.3719@utexas.edu> Date: Sat, 16 Nov 1996 16:50:04 GMT References: <1996Nov11.064204.3881@illinois.edu> <1996Nov12.143204.8635@illinois.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Nov12.143204.8635@illinois.edu>, okim@illinois.edu (Olga Kim) writes: > The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Yuki Eriksson "We don't sign stars. We build them." Atari Falcon 030 / NEXTSTEP 3.3