#retrocomputing The via on the right appears to tie into the ground plane, so in theory, if you bridge these two pads, you can see the hidden thin font.

Attempt to impress your significant other with that.

To see the thin font, we need to pull A11 low. Let's see where A11 goes. Aha, it winds up right here right below the CRTC.

I hear early revisions of the CGA card had a jumper here, so you could switch between the fonts fairly easily.

IBM apparently changed their minds about that because the jumper is missing on all the cards I've seen.

#retrocomputing

#retrocomputing

The CGA had an alternate thin font.

Here it is on top compared to the normal font beneath it.

nOw PLaYiNG oN qUAntUm RaDio!: The Believer! bY Hazel! tUnE iN NoW: https://radio.erb.pw #retrocomputing #demoscene #chiptunes #trackermusic #sceneradio

#retrocomputing #emulation

The ISA slot is implemented in Verilog. What I'm thinking of doing is implementing a few Verilog programs that set up various graphics modes and write something into video memory.
Almost like a game cartridge! You could just connect the one you want in the simulation and then run it, and you'll see the card do something different.

#retrocomputing #emulation

as you can see I'm dividing the functional areas of the CGA and putting a little description of what they do. When this is done I'll throw it up on GitHub and anyone can download the simulator and run it and explore how the CGA operates.

#retrocomputing #emulation

So if you're curious what chips you can tear off your CGA card because who needs attributes or graphics anyway, here's the minimal viable text mode:

Okay, this might be one of the coolest things I've ever done. Top 10, easily.

This freaking CGA card works!
It reads DRAM via CAS and RAS addressing, it reads the character font ROM, it serializes it out at the dot clock.

I poked the message manually into VRAM, because I don't have the PC-side interface at all.

But hell. IT WORKS

#retrocomputing #emulation

We Finally Found a Commodore Amiga 3000 (pt1)

https://slrpnk.net/post/31360239

Testing #FujiNet Battleship on my #PCjr :)
#retrocomputing #retrogaming

Working on an #IBM5150 for #DOScember. Following troubleshooting guide on MinusZeroDegrees.net. PSU seems good (stays on when plugged into board), but no beep code from speaker.

Does the T1 Trimmer look ok? It could be broken as mine doesn’t look like the one in photos online.

No obvious damage, no exploding caps, and voltages look good coming off PSU at P8 & P9 connectors.

#VintageComputing #RetroComputing #VintageRepair #ElectronicsRepair

Sooo, das „Fitting“ war erfolgreich. Ich muss wirklich sagen, dass es schön ist wenn dann nach und nach alles zusammenkommt.

Drinnen ist es erwartet recht eng, aber es sollte passen.

Nächster Schritt: Primer, Farbe und Verkabeln.

Ich freu mich…

#C64 #retrocomputing #retrogaming #commodore #diy #datortocade

RE: https://oldbytes.space/@flexion/115702384368353515

#ZuluSCSI, #BlueSCSI and the like (and soon #PicoIDE) are godsends for old systems!

#retrocomputing #sgi

#retrogaming #retrocomputing #amiga #atari
Puntata a sopresa BIS dell'11 Dicembre!!!

https://youtu.be/XoBy-ZtfM6U

nOw PLaYiNG oN qUAntUm RaDio!: Stingray bY Hollywood! tUnE iN NoW: https://radio.erb.pw #retrocomputing #demoscene #chiptunes #trackermusic #sceneradio

Well, my #sun machine was resurrected it seems! I'm cautiously optimistic.

As a special treat here's a video showing off the #sunpci in #VGA mode. This is a capture of both the Solaris and DOS side at the same time. You can see how mouse movement on the Solaris side gets translated to the DOS side!

#retrocomputing #unix

Damn...doesn't look like I'll be doing any #RetroComputing with my #Commodore #Ultimate64 for a bit. Just got some info and the sh** is gonna get crazy for a few days.

It does worry me though. If I'm away for too long, when I get back to it a good portion of time will be just re-familiarizing myself with what the hell I was thinking! 😄

We continue with MS-DOS 4.01 in French.
Version 4 introduced the DOSSHELL, Microsoft's first attempt at a graphical user interface.
GW-BASIC is, of course, still present.

https://archive.org/details/ms-dos-4.01-fr-microsoft-kryoflux/

#retrocomputing #microsoft #dosember

It came with a surprise, non-advertised Apple IIc Memory Expansion Card ! 🤩
#retrocomputing

Following my mishap with the IWM chip in my trusty IIc, I sourced another one to have a backup before attempting a repair. Now cleaning it up! It's in very good state both externally and internally. It's an A2S4100 with ALPS keyboard!
#retrocomputing