From dandersson@hanse.de Thu Aug 03 06:22:27 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!dandersson From: dandersson@hanse.de (Dong-hyun Andersson) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Aug03.062227.1597@hanse.de> Date: Thu, 03 Aug 1995 06:22:27 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Dong-hyun Andersson *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From nlarsson@panix.com Thu Aug 03 20:16:27 1995 Path: ashpoly!cascade!brgate!saturno!panix!nlarsson From: nlarsson@panix.com (Nadine Larsson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Aug03.201627.2830@panix.com> Date: Thu, 03 Aug 1995 20:16:27 GMT References: <1995Aug03.062227.1597@hanse.de> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Aug03.062227.1597@hanse.de>, dandersson@hanse.de (Dong-hyun Andersson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > 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. -- Nadine Larsson | nlarsson@panix.com PGP Key fingerprint: 037A 3E17 DC02 F7BA "Keep the channels open." From tlindqvist@purdue.edu Sat Aug 05 05:48:27 1995 Path: ashpoly!cascade!mxgate!coyoacan!purdue!tlindqvist From: tlindqvist@purdue.edu (Tyler Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Aug05.054827.8290@purdue.edu> Date: Sat, 05 Aug 1995 05:48:27 GMT References: <1995Aug03.062227.1597@hanse.de> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Aug03.062227.1597@hanse.de>, dandersson@hanse.de (Dong-hyun Andersson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Tyler Lindqvist "Measuring a record you own is listening, not piracy." Sun SparcStation 20 / Linux 1.2.13 From jreyes@kiae.su Sat Aug 05 19:23:27 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kiae!jreyes From: jreyes@kiae.su (Ji-woo Reyes) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Aug05.192327.3766@kiae.su> Date: Sat, 05 Aug 1995 19:23:27 GMT References: <1995Aug03.062227.1597@hanse.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Aug03.062227.1597@hanse.de>, dandersson@hanse.de (Dong-hyun Andersson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Ji-woo Reyes *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0