Denial

[...] The IER does not work like a classical read/write register. Actually, the MSB specifies an action (0 = reset bit(s), 1 = set bit(s)), the lower 7 bits specify which of the interrupt sources is affected. More details here: Stop a running timer - and further discussion about the half dozen meth...

The order is important here: to initiate the BASIC warmstart, the STOP key must be held down while the RESTORE key is tapped. The other way round the NMI routine in the KERNAL will return immediately and pressing the STOP afterwards then has no effect. Does the STOP key function on its own (i.e. can...

Wouldn't this rely on an FPGA implementation of the VIC chip? That's a common misconception. As I wrote elsewhere : a complete emulation of a computer, be it a software-only as in VICE or as combination of hardware and software in a FPGA has substantially relaxed timing requirements, as ultimately ...

[...] colour clash. It's what the Speccy is famous for, but it didn't do it first. The Vic-20 beat it to colour-clash by at least a year. [...] About any home computer at that time had to compromise on memory bandwidth for the video chip. Adding lower resolution attributes to the 'B/W' display data...

In "Back in the Good Old Days" demo from 2004 I allocated chars dynamically (like a ring buffer) when drawing and eor-filling the frame [...] Char 0 was used for empty screen [...] I had 3 more "preset" chars for quickly filling 4x16 pix areas of solid colors (bit patterns $55, ...

There seems to be an odd contradiction, as more people find Dad's box of computer stuff in the loft and flog it there are more people wanting to reminisce about their first computer. Or the sellers simply count on uninformed buyers. For example, nearly all cartridges had their ROMs being dumped so ...

I struggled with those double irqs If the purpose of those "double IRQs" is to set up a stable raster IRQ, you might want to take a sharp look at this: ** Stable rasters on the VIC-20 . That is the canonical way to do this on the VIC-20, with a cycle exact timer interrupt once per frame, ...

It would have been preferable to raise that kind of question in PM: Amused disbelief, I suppose; my apologies if that approach to fostering discussion instead generates discontent on anyone's part ... That is the issue with any one-word comment placed in public that leaves the one being addressed in...

CGA? Yes. Do you not know what CGA is or is that question mark intended to convey disbelief? I have seen that VIC20 on the table. What hardware was attached to it? The VIC-2020 MINIMON cartridge with Mega-Cart as secondary cartridge. Plus a Manosoft C64SD V2 SD2IEC drive. And on the monitor I have ...

On this year's Revision party, I converted an entry of the Oldskool Graphics Compo (Saphron by skrzyp / INBA Systems) to the VIC-20:



Here's the converted picture for download (use the displayer in the OP!).

There's also a RENUMBER command in the Programmer's Aid cartridge, the dump of which could easily be installed with the cartridge menu of FE3 ...

So we can meet there :) For the record, tokra had his VIC-20 set up and running on a table right next to the central corridor. ... BTW, tokra and I had a nice meetup with two graphicians from Poland (skrzyp and Erick Elis of INBA Systems) who were amazed seeing skrzyp's entry to the Oldskool Graphi...

Did converting this game to load from disk force the use of a RAM expander? Those are just bad "cracks" - not that the game actually had a copy protection of any noteworthiness. However, bringing all the data into place from disk instead of tape might require some extra memory, because ta...

Thank you!

wrote:You should seriously consider giving it again, or even doing a YouTube version for us!

Edit: The video is up here: https://www.youtube.com/watch?v=LiPrL9788wU. Enjoy!

Greetings,

Michael

To those interested,

I will give a seminar lecture on the topic of Machine Language Monitors on Revision 2024.

The seminar is scheduled on Friday, Mar. 29th, 6 P.M. CET (1 P.M. EST, 10 A.M. PST).

Greetings,

Michael