From vito@clari.net Tue Nov 05 08:21:02 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!clari!vito From: vito@clari.net (Valeria Ito) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov05.082102.1035@clari.net> Date: Tue, 05 Nov 1996 08:21:02 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 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? -- Valeria Ito "A soul is not exclusive to biology." Atari TT030 / NEXTSTEP 3.3 From mduarte@stanford.edu Wed Nov 06 16:34:02 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!mduarte From: mduarte@stanford.edu (Marisol Duarte) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov06.163402.4732@stanford.edu> Date: Wed, 06 Nov 1996 16:34:02 GMT References: <1996Nov05.082102.1035@clari.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Nov05.082102.1035@clari.net>, vito@clari.net (Valeria Ito) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. If you are posting from AOL, please read RFC 1036 before posting again. -- Marisol Duarte Practical Peripherals 14.4 @ 19,200 bps "Extraordinary claims require extraordinary spectra."