From dperez@uni-hamburg.de Fri Apr 15 03:12:38 1994 Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!dperez From: dperez@uni-hamburg.de (Diego Pérez) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Apr15.031238.4109@uni-hamburg.de> Date: Fri, 15 Apr 1994 03:12:38 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 10 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. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Diego Pérez Tape trading list upon request. SASE required for international mail. From mivanov@titech.ac.jp Fri Apr 15 16:42:38 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!titech!mivanov From: mivanov@titech.ac.jp (Min-jun Ivanov) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Apr15.164238.1397@titech.ac.jp> Date: Fri, 15 Apr 1994 16:42:38 GMT References: <1994Apr15.031238.4109@uni-hamburg.de> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1994Apr15.031238.4109@uni-hamburg.de>, dperez@uni-hamburg.de (Diego Pérez) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Min-jun Ivanov Tape trading list upon request. SASE required for international mail. From dgonzalez@utexas.edu Sat Apr 16 21:18:38 1994 Path: ashpoly!cascade!mxgate!coyoacan!utexas!dgonzalez From: dgonzalez@utexas.edu (Dmitri González) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Apr16.211838.7704@utexas.edu> Date: Sat, 16 Apr 1994 21:18:38 GMT References: <1994Apr15.031238.4109@uni-hamburg.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Apr15.031238.4109@uni-hamburg.de>, dperez@uni-hamburg.de (Diego Pérez) 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. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Dmitri González "A soul is not exclusive to biology." Commodore Amiga 500 (1MB OCS) / NEXTSTEP 3.3 From khernandez@rwth-aachen.de Sun Apr 17 00:52:38 1994 Path: ashpoly!cascade!bigsur!rwth-aachen!khernandez From: khernandez@rwth-aachen.de (Karen Hernández) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Apr17.005238.6495@rwth-aachen.de> Date: Sun, 17 Apr 1994 00:52:38 GMT References: <1994Apr15.031238.4109@uni-hamburg.de> <1994Apr16.211838.7704@utexas.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr16.211838.7704@utexas.edu>, dgonzalez@utexas.edu (Dmitri González) writes: > Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Karen Hernández Hayes Optima 288 @ 19,200 bps "Row 14. No joke." From elindqvist@panix.com Mon Apr 18 15:32:38 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!elindqvist From: elindqvist@panix.com (Elaine Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Apr18.153238.5428@panix.com> Date: Mon, 18 Apr 1994 15:32:38 GMT References: <1994Apr15.031238.4109@uni-hamburg.de> <1994Apr16.211838.7704@utexas.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr16.211838.7704@utexas.edu>, dgonzalez@utexas.edu (Dmitri González) writes: > Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. 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. -- Elaine Lindqvist "5 sigma is a discovery. 7 is a question." Sun 3/60 (SunOS 4.1.1) / Linux 1.2.13