From cgirard@pipeline.com Sat Nov 23 19:17:40 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!cgirard From: cgirard@pipeline.com (Camila Girard) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov23.191740.7510@pipeline.com> Date: Sat, 23 Nov 1996 19:17:40 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. 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? -- Camila Girard "The hatch is open. Is anyone listening?" Commodore Amiga 500 (1MB OCS) / TOS 4.04 From hnakamura@ox.ac.uk Sun Nov 24 10:58:40 1996 Path: ashpoly!cascade!transat!ukc!fennimore!ox!hnakamura From: hnakamura@ox.ac.uk (Hana Nakamura) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov24.105840.1998@ox.ac.uk> Date: Sun, 24 Nov 1996 10:58:40 GMT References: <1996Nov23.191740.7510@pipeline.com> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Nov23.191740.7510@pipeline.com>, cgirard@pipeline.com (Camila Girard) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Hana Nakamura "They will send a copy in my place." Atari TT030 / SunOS 4.1.4 From tstewart@demon.co.uk Mon Nov 25 14:58:40 1996 Path: ashpoly!cascade!bigsur!demon!tstewart From: tstewart@demon.co.uk (Tobias Stewart) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov25.145840.8180@demon.co.uk> Date: Mon, 25 Nov 1996 14:58:40 GMT References: <1996Nov23.191740.7510@pipeline.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Nov23.191740.7510@pipeline.com>, cgirard@pipeline.com (Camila Girard) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- === Tobias Stewart === Dept of Electrical Engineering, Demon Internet Services UK "Hardware is temporary. The signal survives." From smartinez@delphi.com Tue Nov 26 12:35:40 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!delphi!smartinez From: smartinez@delphi.com (Seo-yeon Martínez) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov26.123540.1826@delphi.com> Date: Tue, 26 Nov 1996 12:35:40 GMT References: <1996Nov23.191740.7510@pipeline.com> <1996Nov24.105840.1998@ox.ac.uk> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Nov24.105840.1998@ox.ac.uk>, hnakamura@ox.ac.uk (Hana Nakamura) writes: > Looks like a prototype telecommunications board for military secure voice, not an audio music product. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. PGP Public key available via finger or upon request. -- === Seo-yeon Martínez === Dept of Electrical Engineering, Delphi Internet Services "Row 14. No joke." From bsanchez@tum.de Tue Nov 26 19:44:40 1996 Path: ashpoly!cascade!brgate!saturno!tum!bsanchez From: bsanchez@tum.de (Bill Sánchez) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov26.194440.4729@tum.de> Date: Tue, 26 Nov 1996 19:44:40 GMT References: <1996Nov23.191740.7510@pipeline.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Nov23.191740.7510@pipeline.com>, cgirard@pipeline.com (Camila Girard) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Bill Sánchez SupraFAXModem 28.8 @ 28,800 bps "Tape doesn't lie at 02:14. Ears do."