Telephone wiring Telephone connectors and adapters RJ45/RJ12/RJ11 For the most part I follow the CuTEL wiring standards. On the RJ side, these are wired as follows: RJ45 pin RJ12 pin RJ11 pin Function 1 Unused, optional Line 3
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Blocking internet abuse by ASN Sometimes an internet provider cares so little about dealing with ne er-do-well customers, you just have to block their entire IP range. IP ranges change over time, but something which changes much less often is the AS (
A universal serial cable I ve been playing around with RS232-interface peripherals a lot recently, and keep finding that I never have the right cables on hand. There are DTE and DCE variants, 9-pin and 25-pin, and even some weird combinations (notably
ACM hardware Photos Hardware description The ACM is a relatively simple board with only four major components: * NCR-manufactured custom ASIC * General Instrument part number 72523-2 F840590 A9023 * “Team Banzai” marking on the die.
Datatrak reverse-engineering Datatrak was a land-based radio navigation system which used the phase difference between several long-wave radio signals to pinpoint the location of a receiver. I acquired a few of Datatrak location-only “Trakbak” receivers from eBay, and have been slowly reverse-engineering them.
DDS/DAT notes These are some general notes on DAT and DDS drives. I fell into this rabbit-hole after someone gave me a HP DAT72 drive, and I picked up a Tascam DAT deck and a couple of Archive DAT-capable drives. DAT has since become my go-to for data interchange between older and newer systems, especially under UNIX or where I have a SCSI card available in the origin machine. (generally I use LTO…
Ghidra cheat sheet These are a few notes to remind myself about some features of the Ghidra SRE framework, which I keep forgetting! Left-click label highlighting The default assignment for label highlighting in IDA is a left-click on the name of the label. Ghidra also has this feature, but the default binding is the