From ehernandez@kth.se Sat Aug 10 03:43:11 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kth!ehernandez From: ehernandez@kth.se (Elaine Hernández) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug10.034311.2021@kth.se> Date: Sat, 10 Aug 1996 03:43:11 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. 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. -- === Elaine Hernández === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "Row 14. No joke." From bmuller@pipeline.com Sat Aug 10 23:21:11 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!bmuller From: bmuller@pipeline.com (Bill Müller) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug10.232111.3980@pipeline.com> Date: Sat, 10 Aug 1996 23:21:11 GMT References: <1996Aug10.034311.2021@kth.se> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Aug10.034311.2021@kth.se>, ehernandez@kth.se (Elaine Hernández) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. > Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Bill Müller *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0