From fsanchez@hanse.de Sat Sep 23 21:39:20 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!fsanchez From: fsanchez@hanse.de (Fiona Sánchez) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep23.213920.4553@hanse.de> Date: Sat, 23 Sep 1995 21:39:20 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 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. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Fiona Sánchez SupraFAXModem 28.8 @ 33,600 bps "Marcus is not one man." From nlindqvist@unam.mx Sun Sep 24 00:20:20 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!unam!nlindqvist From: nlindqvist@unam.mx (Nadine Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep24.002020.5169@unam.mx> Date: Sun, 24 Sep 1995 00:20:20 GMT References: <1995Sep23.213920.4553@hanse.de> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Sep23.213920.4553@hanse.de>, fsanchez@hanse.de (Fiona Sánchez) 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. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Nadine Lindqvist "Extraordinary claims require extraordinary spectra." Amiga 1200 (Blizzard 030/50) / AmigaOS 3.1 From veriksson@illinois.edu Sun Sep 24 13:08:20 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!illinois!veriksson From: veriksson@illinois.edu (Valeria Eriksson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep24.130820.7185@illinois.edu> Date: Sun, 24 Sep 1995 13:08:20 GMT References: <1995Sep23.213920.4553@hanse.de> <1995Sep24.002020.5169@unam.mx> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Sep24.002020.5169@unam.mx>, nlindqvist@unam.mx (Nadine Lindqvist) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Valeria Eriksson -- University of Illinois Urbana-Champaign "5 sigma is a discovery. 7 is a question." From tkarlsson@purdue.edu Tue Sep 26 01:30:20 1995 Path: ashpoly!cascade!mxgate!coyoacan!purdue!tkarlsson From: tkarlsson@purdue.edu (Tobias Karlsson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep26.013020.7338@purdue.edu> Date: Tue, 26 Sep 1995 01:30:20 GMT References: <1995Sep23.213920.4553@hanse.de> <1995Sep24.002020.5169@unam.mx> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep24.002020.5169@unam.mx>, nlindqvist@unam.mx (Nadine Lindqvist) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Tobias Karlsson *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0