From csantos@pacbell.net Tue Mar 01 07:21:06 1994 Path: ashpoly!cascade!bigsur!pacbell!csantos From: csantos@pacbell.net (Camila Santos) Newsgroups: comp.sys.m68k Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Mar01.072106.9213@pacbell.net> Date: Tue, 01 Mar 1994 07:21:06 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 10 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Camila Santos -- Pacific Bell Internet Services "When every node is whole, the channel opens." From yhernandez@panix.com Wed Mar 02 15:31:06 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!yhernandez From: yhernandez@panix.com (Yuki Hernández) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Mar02.153106.4601@panix.com> Date: Wed, 02 Mar 1994 15:31:06 GMT References: <1994Mar01.072106.9213@pacbell.net> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Mar01.072106.9213@pacbell.net>, csantos@pacbell.net (Camila Santos) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. 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. -- Yuki Hernández "We don't sign stars. We build them." Amiga 1200 (Blizzard 030/50) / AmigaOS 3.1 From lmartinez@u-tokyo.ac.jp Wed Mar 02 17:52:06 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!lmartinez From: lmartinez@u-tokyo.ac.jp (Liam Martínez) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Mar02.175206.8441@u-tokyo.ac.jp> Date: Wed, 02 Mar 1994 17:52:06 GMT References: <1994Mar01.072106.9213@pacbell.net> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Mar01.072106.9213@pacbell.net>, csantos@pacbell.net (Camila Santos) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Liam Martínez Tape trading list upon request. SASE required for international mail. From nkuznetsov@titech.ac.jp Fri Mar 04 13:37:06 1994 Path: ashpoly!cascade!brgate!saturno!titech!nkuznetsov From: nkuznetsov@titech.ac.jp (Nadia Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Mar04.133706.1838@titech.ac.jp> Date: Fri, 04 Mar 1994 13:37:06 GMT References: <1994Mar01.072106.9213@pacbell.net> <1994Mar02.175206.8441@u-tokyo.ac.jp> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Mar02.175206.8441@u-tokyo.ac.jp>, lmartinez@u-tokyo.ac.jp (Liam Martínez) writes: > Looks like a prototype telecommunications board for military secure voice, not an audio music product. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Nadia Kuznetsov *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From nmartinez@earthlink.net Sun Mar 06 08:32:06 1994 Path: ashpoly!cascade!bigsur!earthlink!nmartinez From: nmartinez@earthlink.net (Natalia Martínez) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Mar06.083206.2165@earthlink.net> Date: Sun, 06 Mar 1994 08:32:06 GMT References: <1994Mar01.072106.9213@pacbell.net> <1994Mar02.153106.4601@panix.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Mar02.153106.4601@panix.com>, yhernandez@panix.com (Yuki Hernández) writes: > 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. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Natalia Martínez Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------