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tamiwiki:projects:kvm

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KVM

hi this is kvm all about kvm only kvm

what im trying to get is seemless switching between sources. this calls for a unified EDID “fingerprint” from all sources.

                     ┌─► HDMI Dummy plug
GPU ──► 1x2 splitter │
                     └─► KVM

dummy hdmi

has circuitry to store and transmit EDID (Extended Display Identification Data) emulation information to the GPU. by using an EEPROM (Electrically Erasable Programmable Read-Only Memory) chip programmed with the EDID data of a typical monitor. a.k.a hdmi emulator plug

there are such dummys that have a passthru female socket. i have not find a nice one yet

generic HDMI splitter 1x2

i got the following in my weekly meeting with aliexpress packges at the mailroom.

MS9332 IC

The MS9332 is a one-to-two active splitter that supports a signaling rate up to 3.0Gbps. With 3.0Gbps capability, the MS9332 can support the new 4K@30Hz video format. The MS9332 equalizes incoming TMDS data with optimal quality regardless of the incoming signal quality. The highly acclaimed equalization technology provides for support of long or low-quality HDMI cables at even the highest speeds. Input terminations of the TMDS inputs and output current levels are both programmable. The chip also supports on-chip HDCP Keys RAM and EDID Memory. mirror Function Block Diagram

Features

  • Compliant with HDMI 1.4b
  • Support One Port input,2 Port output
  • Support HDMI 4K@30Hz
  • Adaptive input equalization
  • Output Pre-emphasis
  • Support 10/12/16 bit Deep Color input/output
  • Automatically monitor HDMI input signal
  • Automatically monitor the status of HDMI output devices
  • Support 5V TTL DDC
  • Integrated pre-programmed HDCP keys
  • Embedded EDID RAM saves external EDID ROM costs
  • No external crystal oscillations are required
  • LQFP64 (10mm×10mm)

teardown

pxl_20240129_202515495.jpg pxl_20240129_202419111.jpg

EDID

parts

tamiwiki/projects/kvm.1706629822.txt.gz · Last modified: 2024/01/30 17:50 by yair