From esmirnov@purdue.edu Mon Sep 25 00:38:50 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!purdue!esmirnov From: esmirnov@purdue.edu (Elaine Smirnov) Newsgroups: comp.sys.m68k Subject: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep25.003850.2165@purdue.edu> Date: Mon, 25 Sep 1995 00:38:50 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Hardware disassembly report for Motorola hardware hackers. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Did Marcus take the decryption EPROM with him when he left the lab? -- === Elaine Smirnov === Dept of Electrical Engineering, Purdue University Engineering Computer Network "Do not worship the copy." From skuznetsov@hanse.de Tue Sep 26 06:19:50 1995 Path: ashpoly!cascade!brgate!saturno!hanse!skuznetsov From: skuznetsov@hanse.de (Sergei Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep26.061950.8920@hanse.de> Date: Tue, 26 Sep 1995 06:19:50 GMT References: <1995Sep25.003850.2165@purdue.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Sep25.003850.2165@purdue.edu>, esmirnov@purdue.edu (Elaine Smirnov) writes: > Hardware disassembly report for Motorola hardware hackers. > Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Sergei Kuznetsov "Measuring a record you own is listening, not piracy." Amiga 3000T / NEXTSTEP 3.3