From tnovak@mindspring.com Mon Mar 13 04:21:13 1995 Path: ashpoly!cascade!brgate!saturno!mindspring!tnovak From: tnovak@mindspring.com (Thiago Novak) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar13.042113.9600@mindspring.com> Date: Mon, 13 Mar 1995 04:21:13 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Thiago Novak *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From elee@mindspring.com Tue Mar 14 18:04:13 1995 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!elee From: elee@mindspring.com (Élodie Lee) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar14.180413.8074@mindspring.com> Date: Tue, 14 Mar 1995 18:04:13 GMT References: <1995Mar13.042113.9600@mindspring.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Mar13.042113.9600@mindspring.com>, tnovak@mindspring.com (Thiago Novak) 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. -- Élodie Lee | elee@mindspring.com PGP Key fingerprint: 9228 3B52 370E 04B7 "Keep the channels open." From lsanchez@utexas.edu Wed Mar 15 09:38:13 1995 Path: ashpoly!cascade!mxgate!coyoacan!utexas!lsanchez From: lsanchez@utexas.edu (Lars Sánchez) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar15.093813.8770@utexas.edu> Date: Wed, 15 Mar 1995 09:38:13 GMT References: <1995Mar13.042113.9600@mindspring.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Mar13.042113.9600@mindspring.com>, tnovak@mindspring.com (Thiago Novak) 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. -- Lars Sánchez -- University of Texas at Austin "There are 14 nodes and only 10 countries. Count again." From ocampbell@hanse.de Thu Mar 16 12:26:13 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!hanse!ocampbell From: ocampbell@hanse.de (Olga Campbell) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar16.122613.1691@hanse.de> Date: Thu, 16 Mar 1995 12:26:13 GMT References: <1995Mar13.042113.9600@mindspring.com> <1995Mar14.180413.8074@mindspring.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Mar14.180413.8074@mindspring.com>, elee@mindspring.com (Élodie Lee) writes: > Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Olga Campbell | ocampbell@hanse.de PGP Key fingerprint: 4485 31B3 5DE0 517C "Keep the channels open."