From bpetrov@tum.de Tue Jan 17 14:20:59 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!bpetrov From: bpetrov@tum.de (Bruno Petrov) Newsgroups: comp.sys.m68k Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan17.142059.5248@tum.de> Date: Tue, 17 Jan 1995 14:20:59 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Bruno Petrov Zyxel U-1496E @ ISDN 64k bps "The carrier frequency does not drift by accident." From sweber@clari.net Wed Jan 18 19:13:59 1995 Path: ashpoly!cascade!transat!ukc!fennimore!clari!sweber From: sweber@clari.net (Sergei Weber) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan18.191359.2882@clari.net> Date: Wed, 18 Jan 1995 19:13:59 GMT References: <1995Jan17.142059.5248@tum.de> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Jan17.142059.5248@tum.de>, bpetrov@tum.de (Bruno Petrov) writes: > 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'. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Sergei Weber Tape trading list upon request. SASE required for international mail. From atanaka@rwth-aachen.de Thu Jan 19 16:41:59 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!rwth-aachen!atanaka From: atanaka@rwth-aachen.de (Aiko Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan19.164159.4460@rwth-aachen.de> Date: Thu, 19 Jan 1995 16:41:59 GMT References: <1995Jan17.142059.5248@tum.de> <1995Jan18.191359.2882@clari.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan18.191359.2882@clari.net>, sweber@clari.net (Sergei Weber) writes: > Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Aiko Tanaka *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0