From enakamura@demon.co.uk Mon May 13 21:18:42 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!enakamura From: enakamura@demon.co.uk (Élodie Nakamura) Newsgroups: comp.sys.m68k Subject: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996May13.211842.2629@demon.co.uk> Date: Mon, 13 May 1996 21:18:42 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] 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. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Élodie Nakamura | enakamura@demon.co.uk PGP Key fingerprint: 6204 5DC2 20FC B57D "Keep the channels open." From astewart@pipeline.com Tue May 14 03:50:42 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!astewart From: astewart@pipeline.com (Aiko Stewart) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996May14.035042.2671@pipeline.com> Date: Tue, 14 May 1996 03:50:42 GMT References: <1996May13.211842.2629@demon.co.uk> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996May13.211842.2629@demon.co.uk>, enakamura@demon.co.uk (Élodie Nakamura) 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. -- Aiko Stewart | astewart@pipeline.com PGP Key fingerprint: 5259 B6F7 31B9 C864 "Keep the channels open." From nfournier@hanse.de Tue May 14 06:03:42 1996 Path: ashpoly!cascade!brgate!saturno!hanse!nfournier From: nfournier@hanse.de (Nadia Fournier) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996May14.060342.4872@hanse.de> Date: Tue, 14 May 1996 06:03:42 GMT References: <1996May13.211842.2629@demon.co.uk> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996May13.211842.2629@demon.co.uk>, enakamura@demon.co.uk (Élodie Nakamura) writes: > 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. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Nadia Fournier "Hold for relay." Amiga 3000T / NEXTSTEP 3.3