From mchoi@mindspring.com Tue Sep 27 22:59:08 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!mindspring!mchoi From: mchoi@mindspring.com (Marisol Choi) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep27.225908.2706@mindspring.com> Date: Tue, 27 Sep 1994 22:59:08 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. 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? -- Marisol Choi | mchoi@mindspring.com PGP Key fingerprint: B2C3 D3C9 9173 418C "Keep the channels open." From dstewart@netcom.com Wed Sep 28 03:36:08 1994 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!dstewart From: dstewart@netcom.com (Diego Stewart) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep28.033608.9404@netcom.com> Date: Wed, 28 Sep 1994 03:36:08 GMT References: <1994Sep27.225908.2706@mindspring.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Sep27.225908.2706@mindspring.com>, mchoi@mindspring.com (Marisol Choi) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Diego Stewart "They will send a copy in my place." 486DX2/66 (Linux 1.2.13) / Linux 1.2.13 From hnilsson@tum.de Wed Sep 28 07:25:08 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!hnilsson From: hnilsson@tum.de (Hugo Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep28.072508.1038@tum.de> Date: Wed, 28 Sep 1994 07:25:08 GMT References: <1994Sep27.225908.2706@mindspring.com> <1994Sep28.033608.9404@netcom.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Sep28.033608.9404@netcom.com>, dstewart@netcom.com (Diego Stewart) writes: > Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- === Hugo Nilsson === Dept of Electrical Engineering, Technische Universität München "A soul is not exclusive to biology." From ymartinez@demon.co.uk Fri Sep 30 03:31:08 1994 Path: ashpoly!cascade!mxgate!coyoacan!demon!ymartinez From: ymartinez@demon.co.uk (Yuki Martínez) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep30.033108.2359@demon.co.uk> Date: Fri, 30 Sep 1994 03:31:08 GMT References: <1994Sep27.225908.2706@mindspring.com> <1994Sep28.033608.9404@netcom.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Sep28.033608.9404@netcom.com>, dstewart@netcom.com (Diego Stewart) writes: > Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Yuki Martínez -- Demon Internet Services UK "In theory there is no difference between theory and practice." From aandersson@panix.com Sat Oct 01 23:08:08 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!aandersson From: aandersson@panix.com (Anja Andersson) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Oct01.230808.2578@panix.com> Date: Sat, 01 Oct 1994 23:08:08 GMT References: <1994Sep27.225908.2706@mindspring.com> <1994Sep28.033608.9404@netcom.com> <1994Sep30.033108.2359@demon.co.uk> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Sep30.033108.2359@demon.co.uk>, ymartinez@demon.co.uk (Yuki Martínez) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Anja Andersson "Hardware is temporary. The signal survives." NeXTstation Turbo Color / AmigaOS 3.1