From fkang@tum.de Sat Jun 22 10:06:46 1996 Path: ashpoly!cascade!brgate!saturno!tum!fkang From: fkang@tum.de (Fiona Kang) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun22.100646.2385@tum.de> Date: Sat, 22 Jun 1996 10:06:46 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. 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. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Fiona Kang "Extraordinary claims require extraordinary spectra." NeXTstation Turbo Color / SunOS 4.1.4 From rreyes@utexas.edu Sun Jun 23 23:58:46 1996 Path: ashpoly!cascade!mxgate!coyoacan!utexas!rreyes From: rreyes@utexas.edu (Renata Reyes) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun23.235846.8486@utexas.edu> Date: Sun, 23 Jun 1996 23:58:46 GMT References: <1996Jun22.100646.2385@tum.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Jun22.100646.2385@tum.de>, fkang@tum.de (Fiona Kang) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Renata Reyes "In theory there is no difference between theory and practice." Sun 3/60 (SunOS 4.1.1) / System 7.5.1