From kduarte@uni-hamburg.de Sun Nov 27 01:40:27 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!kduarte From: kduarte@uni-hamburg.de (Kirsty Duarte) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Nov27.014027.5081@uni-hamburg.de> Date: Sun, 27 Nov 1994 01:40:27 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Kirsty Duarte US Robotics Courier V.34 @ 19,200 bps "Measuring a record you own is listening, not piracy." From jsuzuki@kiae.su Sun Nov 27 17:35:27 1994 Path: ashpoly!cascade!mxgate!coyoacan!kiae!jsuzuki From: jsuzuki@kiae.su (Jens Suzuki) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Nov27.173527.8246@kiae.su> Date: Sun, 27 Nov 1994 17:35:27 GMT References: <1994Nov27.014027.5081@uni-hamburg.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Nov27.014027.5081@uni-hamburg.de>, kduarte@uni-hamburg.de (Kirsty Duarte) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. > The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Jens Suzuki "When every node is whole, the channel opens." Macintosh IIfx / SunOS 4.1.4