Baglio Tabifata

- #developer 💻
- #book collector 📖
- #fleamarket enthusiast 🕰️
- #electronic #retro junk hoarder 🕹️
- lazy #hamradio operator 🎙️

[Baglio Tabifata @tabifata]

The more I play around with #STM32 MCUs the more I think I should switch to them for my next projects. I think I'll star playing around with #libopencm3

[Baglio Tabifata @tabifata]

Also modded my second #GBS8200 to support gbs-control. You never know when you might need a spare! #retrogaming

[Baglio Tabifata @tabifata]

I set the repository of ROsiM, my ROM emulator, to public. The Loader client repository will follow once I implemented #xmodem (big improvement using it, btw) on there too. Enjoy. #eprom #retrocomputing
https://t.co/CF7Mr1RS5d

[Baglio Tabifata @tabifata]

First real test for the #ROsiM ROM simulator: replace the 29C040 ROM on this #N8VEM #sbc . Worked wonderfully! I need to rewrite the upload code though: it's too slow for large dumps.

[Baglio Tabifata @tabifata]

Excuse my enthusiasm while I watch this carpet of ugly colored blocks on my TV, but this means I successfully got color on my european #appleii after replacing the crystal! Woohoo!!! #retrogaming

[Baglio Tabifata @tabifata]

Started initial testing on my new project. I will announce it once I found out there are no showstopping mistakes I made, but couldn't resist giving a #sneakpeek of it. #avr #retrocomputing

[Baglio Tabifata @tabifata]

Testing my prototype adapter board for the #GBS8200 scaler. It includes a csync stripper, a TTL to analog converter (for CGA), a H/Vsync combiner and an audio attenuation circuit. I already found things I need to fix/change, but it's an encouraging start. #retrogaming #scaler

[Baglio Tabifata @tabifata]

Installed the PCB for my Apple IIe speaker decoder replacement, now this #appleii regained it's voice. The IOU chip on this has the SPKR pin dead. #repair #retrocomputing

[Baglio Tabifata @tabifata]

Built and tested the SMD variant of my #pontag device! It's an active adapter from PS/2 to serial mice (Supports #Microsoft protocol, including wheel) for IBM compatible #retrocomputing pleasure! https://t.co/fTxNkX6qvk​
#hardware #avr #pcb

[Baglio Tabifata @tabifata]

I released the first version of the DuPAL Peeper tool. https://t.co/wofNDFIvbo
Hopefully one day it'll be useful to someone looking to study some Programmable Array Logic devices. #reverseengineering #electronics

[Baglio Tabifata @tabifata]

This board is from a project I put on hold in march in a pretty advanced state: need to validate the design and release, firmware already done & tested. A mouse converter from PS/2 to serial protocols, mousewheel supported too! I'm using the prototype on #msdos #retrocomputers

[Baglio Tabifata @tabifata]

Getting ready to release the Peeper, a tool to manually test the behaviour of a PAL by toggling the PINs graphically. Works connected to my DuPAL board OR it can simulate the device by using a raw state graph generated by my analyzer. #reverseengineering #electronic #repair

[Baglio Tabifata @tabifata]

Connected the external frequency synth to the #GBS8200 scaler. Now I'll go on designing my input board. Ideally it should feature a SCART in, a sync stripper, and circuitry to convert TTL CGA signals. #retrogaming

[Baglio Tabifata @tabifata]

Step 1 of modding my #GBS8200 is done: firmware and basic hardware mods. Next is new clock generator, then design add-on PCB with a sync stripper and optional TTL sync inverter, plus SCART and DB9 inputs. #retrogaming #modding

[Baglio Tabifata @tabifata]

So, this Apple IIe had a fried speaker output pin on the IOU, a custom unobtanium chip. I reimplemented part of the decoding circuitry using a GAL and a '373. It beeps now! #appleii #repair #retrocomputer

[Baglio Tabifata @tabifata]

Well, the previous owner of this #macintosh Classic II liked to play some #flightsimulator I see! Impressive how good it can look with just 1-bit graphics. #retrogaming

[Baglio Tabifata @tabifata]

Wot! I repaired the corroded #macintosh Classic board! A bit of an hackjob: 5 repaired traces, all caps replaced and a voltage regulator adapted. Yet, it starts! (Photo taken without hd connected and in Classic II case). #retrocomputing #repair

[Baglio Tabifata @tabifata]

It's alive! The #macintosh Classic II turned on for the first time after capacitor replacement! #repair #retrocomputer

[Baglio Tabifata @tabifata]

While clearing up my old storage room I found a box with an Apple II motherboard. Caps not yet replaced, probably never even
tested. Putting this in my pile of #retrocomputers to check. Wonder if I could fit this into a case... #appleii

[Baglio Tabifata @tabifata]

Will take this slowly and replace just a few caps a day (just replaced the cluster on the left). #macintosh classic II #retrocomputer #repair