From seriksson@purdue.edu Sat Mar 09 10:28:19 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!seriksson From: seriksson@purdue.edu (Seo-yeon Eriksson) Newsgroups: comp.sys.m68k Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Mar09.102819.6159@purdue.edu> Date: Sat, 09 Mar 1996 10:28:19 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Seo-yeon Eriksson Tape trading list upon request. SASE required for international mail. From lgonzalez@clari.net Mon Mar 11 11:16:19 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!clari!lgonzalez From: lgonzalez@clari.net (Liam González) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Mar11.111619.9357@clari.net> Date: Mon, 11 Mar 1996 11:16:19 GMT References: <1996Mar09.102819.6159@purdue.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Mar09.102819.6159@purdue.edu>, seriksson@purdue.edu (Seo-yeon Eriksson) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- === Liam González === Dept of Electrical Engineering, ClariNet Communications Corp "We don't sign stars. We build them." From pgonzalez@kth.se Tue Mar 12 04:14:19 1996 Path: ashpoly!cascade!mxgate!coyoacan!kth!pgonzalez From: pgonzalez@kth.se (Pavel González) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Mar12.041419.6941@kth.se> Date: Tue, 12 Mar 1996 04:14:19 GMT References: <1996Mar09.102819.6159@purdue.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1996Mar09.102819.6159@purdue.edu>, seriksson@purdue.edu (Seo-yeon Eriksson) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. If you are posting from AOL, please read RFC 1036 before posting again. -- Pavel González *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0