Repórter Retro 106

https://retropolis.com.br/2024/08/28/reporter-retro-106/

#ReprterRetro #6502 #6800 #6847 #ActionRetro #AdrianBlack #Arcade #Asianometry #AugustoBaffa #Baffa3 #CP500 #Cray #CRT #ctrlaltrees #CultOfTheDeadCow #CulturaHacker #DavesGarage #DigitalEquipmentCorporation #EPROM #fliperama #Fofoca #Intel80286 #LaCoCoStrangiato #Lemmings #Macintosh #MC6847 #PDP11 #PicoMEM #PLM #Prottipo #RaspberryPi #RetroRio #RMC #SeymourCray #SPLM #Tatung #Terminal #The6502Show #ValdemarGomes #v

A little more fun with the #MC6847, hooking the lower part of the address bus to the device's data bus, instead of hardcoding a single value on it, so that it cycles through all the characters.

#HomebrewComputer #Electronics

Time to hook the stages up... And it works! 😅​

Going for broke, I didn't bother to impedance match or AC couple, hooking the small TV's composite port directly to the output of the amplifier stage, hooked up to the Y output of the #MC6847 I received from @ometeer

This awesome monochrome 32x16 screenful of @ signs is the first milestone of adding video to my SBC#0 project. 🤓​

#HomebrewComputer #Electronics

Need to fiddle a little with the output signal level (plus I should load it with 75Ω like a TV would) to be on spec, but something like this should be good enough for a #MC6847 test video driver.

(It's a common emitter amplifier, inverting the signal from the VDG, followed by an emitter follower for buffering.)

#electronics

Testing the #MC6847 received from @ometeer

Just reviewing the expected signal outputs at this stage. Need to do a little inverting signal amplifier before being able to drive an actual composite video input. That'll be the next step if all is good.

Second attempt to source some #MC6847 ICs for my #homebrewcomputer.

Previous ones didn't behave as expected in the test rig, maybe these will...

#electronics

Oh yeah, and what are you gonna *do* about it?

#homebrewcomputer #mc6847 #electronics