#Commmodore

Peter Kreftingnafmo@vivaldi.net
2026-01-08
Dear Mr. or Mrs. Peter Krefting,

You have made the Nice List. Peri Fractic checked it twice – and now your order is on the way.

Commodore has shipped your order with PostNL Parcels non-EU. Your tracking code is <redacted>.
Peter Kreftingnafmo@vivaldi.net
2026-01-02

Sometimes it shows garbage on start, sometimes just a black screen. I'll leave it in, disabled.

#Commmodore #Commodore16

A weird looking screen showing garbage, from the Commodore 16 with the Fixteen memory expansion enabledA regular Commodore 16 startup screen comes up with the expansion disabled
Peter Kreftingnafmo@vivaldi.net
2026-01-02

Uh oh, that is not good. The second unit gives me a black screen with the expansion installed. I pushed in the RAM chips and got some junk on the screen instead.

Moving the jumper to 16K makes it boot up again, so at least I didn't kill the TED chip (I *did* bend its legs slightly on extraction, so I was worried).

So, are the RAM chips on the Fixteen bag, or the assembly? I have no clue. I'll lend it in, but turned off. At least the other one works fine.

#Commmodore #Commodore16 #Fixteen #FAIL

Closeup of the installed Fixteen assembly in a Commodore 16 motherboard, with the memory expansion jumper disabled.
Peter Kreftingnafmo@vivaldi.net
2026-01-02

So, does this make it a Commodore 64? Or maybe a Commodore Minus 4?

#Commmodore #Commodore16

Commodore 16 startup screen reporting 60 Kbyte free RAMCommodore 16 motherboard with the Fixteen mod installed.
Peter Kreftingnafmo@vivaldi.net
2025-12-20

Not bad find for a Saturday morning.

#Commmodore #Suncom #TAC2

A used TAC-2 joystick in a plastic bag
Peter Kreftingnafmo@vivaldi.net
2025-12-15

#PCBWay delivers.

But I need something to pull the TED out without destroying it. It's not as simple as it looks in all those videos the repair guys keep publishing :-) So far all I've manged to do is to make scratch marks...

#Commmodore #Commmodore16

Two Fixteen kits assembled by PCBWay, and three unmounted PCBs
Peter Kreftingnafmo@vivaldi.net
2025-12-05

Got a C128-to-almost VGA adapter off eBay, but my monitors refuse to display anything.

But it got me to try it again, and run diagnostics. Unfortunately, it looks like it has some issues. Possibly the reason it was given away by it's previous owner.

I really should try to get this fixed...

#Commmodore #Commmodore128

Screenshot from C128 diagnosrics saying that three of the logic chips are bad, 2x6526 and 1x6581.
Peter Kreftingnafmo@vivaldi.net
2025-10-31

@root42 This seems to indicate a single bit failure, which, according to the schematics, matches the one chip that was not the same as the others...

#Commmodore #C64

factorofmatt.com RAM tester indicating a single bit failure, causing a stack page error.
Peter Kreftingnafmo@vivaldi.net
2025-10-18

The #RetroScaler2x definitely does a better job. Still not as good as my old CRT, though.

#Commmodore #VIC20

Photo of a VIC20 start-up screen on a HDMI monitor with readable picture quality.
Peter Kreftingnafmo@vivaldi.net
2025-10-06

Ah, the memories!

#Commmodore #Assembler #6502

A hand-assembled 6502 machine code program, written in pencil on grid paper
Peter Kreftingnafmo@vivaldi.net
2025-10-04

My cheap AliExpress CVBS-to-HDMI definitely does not like my #Commmodore #VIC20...

Photo or a VIC20 start-up screen on a HDMI monitor with horrible picture quality
Peter Kreftingnafmo@vivaldi.net
2025-10-04

The most important things are of course the built-in wedge, and double-sided 1571 support.

I didn't even remember that I had installed #JiffyDOS in this #Commmodore1571 drive...

#Commmodore #VIC20

READY.
@
73 JIFFYDOS 6.0 1571,00.,00

READY.
@$
0 "JIFFY DS 251004" PK 2A
1328 BLOCKS FREE.

READY.
Peter Kreftingnafmo@vivaldi.net
2025-10-02

I now have #JiffyDOS on my #Commmodore #VIC20. Not sure how useful it is, though...

VIC20 start-up screen:

 JIFFYDOS (C)1889 CMD

28159 BYTES FREE

READY.
Peter Kreftingnafmo@vivaldi.net
2025-09-29

This one doesn't give any signs of life. No power LED, no serial bus reset, nothing.

I'm not sure I tested it when I got it, or if I only tested the other unit.

#Commmodore #Commodore16

Commodire 16 (serial DA4 12319}
Peter Kreftingnafmo@vivaldi.net
2025-09-28

This one, not so much.

#Commmodore #Commodore16

Commodore 16 connected to a Philips monitor, showing the start-up screen
Peter Kreftingnafmo@vivaldi.net
2025-09-28

Still the most beautiful home computer ever made, IMHO.

#Commmodore #CommmodorePlus4 #Plus4

Commodore Plus 4 connected to a Philips monitor showing the start-up screen.
Peter Kreftingnafmo@vivaldi.net
2025-09-27

What is old is new again.

#Commmodore #VIC20

A Commodore VIC20 showing a BASIC prompt.
Peter Kreftingnafmo@vivaldi.net
2025-09-10

When I scrapped my broken #Commmodore C128DCR a decade and a half ago, I kept the SID chip. Prefect for an Ultimate 64.

Checked it today. It's the wrong chip... I accidentally saved the CIA chip instead. Oops! 😊

Peter Kreftingnafmo@vivaldi.net
2024-06-20

Av ny #Commmodore gurus out there who knows if it is possible to dump an autostarting #VIC20 cartridge on an unmodified VIC?

Peter Kreftingnafmo@vivaldi.net
2024-06-17

That could have looked better...

I guess that cheap upscaler from Ali Express doesn't quite like the C128 pseudo-PAL

#Commmodore #C128

Commodore 128 boot screen being displayed in a garbled manner on a modern monitor

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