From kandersson@unam.mx Fri Jun 02 04:17:06 1995 Path: ashpoly!cascade!transat!ukc!fennimore!unam!kandersson From: kandersson@unam.mx (Kenji Andersson) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun02.041706.8233@unam.mx> Date: Fri, 02 Jun 1995 04:17:06 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx 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. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Kenji Andersson Hayes Optima 288 @ 33,600 bps "Hardware is temporary. The signal survives." From skarlsson@u-tokyo.ac.jp Fri Jun 02 05:58:06 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!u-tokyo!skarlsson From: skarlsson@u-tokyo.ac.jp (Sven Karlsson) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun02.055806.3360@u-tokyo.ac.jp> Date: Fri, 02 Jun 1995 05:58:06 GMT References: <1995Jun02.041706.8233@unam.mx> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Jun02.041706.8233@unam.mx>, kandersson@unam.mx (Kenji Andersson) 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. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Sven Karlsson "A soul is not exclusive to biology." Sun SparcStation 20 / FreeBSD 2.1