André Fachat @[email protected]

Experienced IT Architect. Please go to @afachat.bsky.social or @[email protected]

[André Fachat @[email protected] @afachat]

Want to do transactions in the cloud? Sagas are too limited for your use case? Event-based Sagas are difficult to manage? Here's a new approach: https://t.co/3H4qEJptzU

[André Fachat @[email protected] @afachat]

Save the date - I am presenting my Micro-PET machines at the Toronto PET Users Group call: https://t.co/s8i1g0oLyA this sunday 21pm German time / 3pm EDT
#8bit #mos6502 #micropet

[André Fachat @[email protected] @afachat]

I created specific playlists for the three main topics on my youtube channel:
1) The Micro-PET computer family: https://t.co/v0PZtbta8T
2) the GeckOS operating system: https://t.co/nuFa2vMaJa
3) The Commodore PET: https://t.co/nuFa2vMaJa

Let me know what you like most!
#8bit

[André Fachat @[email protected] @afachat]

Here is a proposed update on the o65 file format. In the proposed 1.3.1 only clarifications are made: https://t.co/Gvky9k6DTA
For ideas for 1.4, pls see and discuss here https://t.co/v6IdFJVzqN

#8bit #mos6502

[André Fachat @[email protected] @afachat]

I had to change the driver to using the Line status register instead of the Interrupt identification register to handle the transfer. Actually makes the driver easier. Not sure why the driver worked on the 16550A and not on the 16752

[André Fachat @[email protected] @afachat]

I have a weird problem with the TL16C752 DUART. I am using my 16550A driver, but it does not seem to be clearing the tx and/or rx ints correctly, even though the IIR handling should be compatible from the datasheet. This throws the driver in a loop. Any experiences/hints?
#8bit

[André Fachat @[email protected] @afachat]

@CodingAndThings Easy. The colour of the bricks don't match the colour of the boards. This introduces quantum colour impedance mismatch, which causes all kinds of errors ;-)

Good luck with the debugging!

[André Fachat @[email protected] @afachat]

Just saw this. The beginning of a new old game!
Brilliantly cool!
#8bit #mos6502 #commodorepet
https://t.co/GnnXr7nJ0N

[Michael Koehn 📯 🕊️ 🇪🇺 @Meikell56]

Was der Vizekanzler sagt.
NUR so wird #Demokratie unsere Aufgaben und Probleme lösen können, nicht wie #Soeder, #Linnemann und andere, die uns populistisch aufwiegeln wollen.
#Habeck

[André Fachat @[email protected] @afachat]

My new video shows how the Commodore PET 8296 creates its video output. An amazing machine with a new architecture. Compatible with the older PETs, but much more capable. A reaction on the Transactor demo is included!
#8bit #mos6502
https://t.co/eXD3fJPIzJ

[André Fachat @[email protected] @afachat]

@commonmodechonk @CodingAndThings Luckily they extended the life of Spartan 6 to at least 2030 IIRC

[André Fachat @[email protected] @afachat]

@hacknet I this revision, I moved from a single UART in PLCC to a dual UART (in TQFP unfortunately), to get more I/O options.

[André Fachat @[email protected] @afachat]

Working on the next revision....
#8bit #mos6502

[André Fachat @[email protected] @afachat]

@hacknet Typically all original 8250 "PC compatible" UARTs have active high interrupt outputs, and generally a different type of bus interface, causing issues connecting to a 6502 system. But this is the first I see with high impedance after reset https://t.co/wBIQl3xgdB

[André Fachat @[email protected] @afachat]

@gregnacu @CommodoreLad A new SuperCPU would be cool too!

[André Fachat @[email protected] @afachat]

In part 2 of my PET video output video series, I look at the PET models with CRTC. That includes high level and deep dive schematics, timing descriptions, and explaining some tricks that are used in demos! https://t.co/01OrLnEYUO
#8bit #mos6502

[André Fachat @[email protected] @afachat]

In part 2 of my PET video output video series, I look at the PET models with CRTC. That includes high level and deep dive schematics, timing descriptions, and explaining some tricks that are used in demos! https://t.co/01OrLnEYUO
#8bit #mos6502

[André Fachat @[email protected] @afachat]

@Olimex Nice one!

But isnt' the claim being 30x faster a little bit exaggerated when the CPU clock is only 6.5 MHz compared to 1980's 1+MHz machines?

[André Fachat @[email protected] @afachat]

@mass_werk No worries. I'm working "bare metal" here 😉

[André Fachat @[email protected] @afachat]

A little teaser for my next video.... Do you notice what's "unusual" for a Commodore PET?
#8bit #mos6502

[André Fachat @[email protected] @afachat]

@mass_werk Interesting. That must be a ROM / software artifact then. The actual charrom does not have the Pi there.