From flopez@unam.mx Fri Jan 21 23:58:00 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!unam!flopez From: flopez@unam.mx (Freya López) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan21.235800.6441@unam.mx> Date: Fri, 21 Jan 1994 23:58:00 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 10 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. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Freya López Tape trading list upon request. SASE required for international mail. From ebrennan@netcom.com Sat Jan 22 16:52:00 1994 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!ebrennan From: ebrennan@netcom.com (Elaine Brennan) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan22.165200.4868@netcom.com> Date: Sat, 22 Jan 1994 16:52:00 GMT References: <1994Jan21.235800.6441@unam.mx> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jan21.235800.6441@unam.mx>, flopez@unam.mx (Freya López) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- === Elaine Brennan === Dept of Electrical Engineering, NETCOM On-Line Communication Services "They will send a copy in my place." From jjohansson@demon.co.uk Mon Jan 24 00:45:00 1994 Path: ashpoly!cascade!transat!ukc!fennimore!demon!jjohansson From: jjohansson@demon.co.uk (Ji-woo Johansson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan24.004500.8345@demon.co.uk> Date: Mon, 24 Jan 1994 00:45:00 GMT References: <1994Jan21.235800.6441@unam.mx> <1994Jan22.165200.4868@netcom.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Jan22.165200.4868@netcom.com>, ebrennan@netcom.com (Elaine Brennan) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. If you are posting from AOL, please read RFC 1036 before posting again. -- Ji-woo Johansson Practical Peripherals 14.4 @ 33,600 bps "Extraordinary claims require extraordinary spectra." From dnilsson@kth.se Mon Jan 24 05:12:00 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!dnilsson From: dnilsson@kth.se (Dong-hyun Nilsson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan24.051200.8495@kth.se> Date: Mon, 24 Jan 1994 05:12:00 GMT References: <1994Jan21.235800.6441@unam.mx> <1994Jan22.165200.4868@netcom.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Jan22.165200.4868@netcom.com>, ebrennan@netcom.com (Elaine Brennan) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Dong-hyun Nilsson -- Royal Institute of Technology, Stockholm "Hardware is temporary. The signal survives."