From pduarte@berkeley.edu Fri Jul 19 00:41:59 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!berkeley!pduarte From: pduarte@berkeley.edu (Pavel Duarte) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jul19.004159.8639@berkeley.edu> Date: Fri, 19 Jul 1996 00:41:59 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Pavel Duarte Practical Peripherals 14.4 @ 33,600 bps "Hardware is temporary. The signal survives." From cgirard@ox.ac.uk Sat Jul 20 23:03:59 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!ox!cgirard From: cgirard@ox.ac.uk (Callum Girard) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jul20.230359.6013@ox.ac.uk> Date: Sat, 20 Jul 1996 23:03:59 GMT References: <1996Jul19.004159.8639@berkeley.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Jul19.004159.8639@berkeley.edu>, pduarte@berkeley.edu (Pavel Duarte) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. > 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. -- Callum Girard *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From jsuzuki@uu.net Mon Jul 22 11:44:59 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!jsuzuki From: jsuzuki@uu.net (Ji-woo Suzuki) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jul22.114459.4069@uu.net> Date: Mon, 22 Jul 1996 11:44:59 GMT References: <1996Jul19.004159.8639@berkeley.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jul19.004159.8639@berkeley.edu>, pduarte@berkeley.edu (Pavel Duarte) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. > 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. -- Ji-woo Suzuki "When every node is whole, the channel opens." 486DX4/100 (FreeBSD 2.0.5) / TOS 4.04 From cmoreno@panix.com Tue Jul 23 22:23:59 1996 Path: ashpoly!cascade!brgate!saturno!panix!cmoreno From: cmoreno@panix.com (Callum Moreno) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jul23.222359.7032@panix.com> Date: Tue, 23 Jul 1996 22:23:59 GMT References: <1996Jul19.004159.8639@berkeley.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jul19.004159.8639@berkeley.edu>, pduarte@berkeley.edu (Pavel Duarte) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. > 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. -- Callum Moreno "A soul is not exclusive to biology." Amiga 3000T / SunOS 4.1.4