Denial

Are you trying to switch back and forth rapidly to create a persistence-of-vision effect of two overlapping characters? If that is what you are trying to do, then the best bet is a raster-synchronized machine language subroutine that switches the characters thirty times per second. The result, if ev...

Yes, I can understand why things like system calls and memory pokes are not compatible, but when Microsoft was writing a tokenized abstract basic for just about every computer (Apple, Commodore, Tandy, MSX, IBM, even the friggin' Altair), why didn't they make the most generic parts of the BASIC lang...

Compute magazine also published instructions for building a cassette interface. It was just a few common components and you could probably do it in a few minutes with a breadboard.

This JMP bug is only for indirectly addressed jumps?

Yes, I can understand why poking memory locations on different computers does not have the same effect, and I can understand why basic keywords that invoke a machines peculiar graphic modes could not be made to work on machines that don't have the same mode. But why did computer makers, back in the ...

How common are machines with non-standard ROMs?

I was asking because I was curious. There are a lot of programs that only work on one machine or another. Some of these programs do very complex things that will only work on one machine type due to timing issues, but some might only require a slight change to work on either machines. That slight ch...

How do you tell, via software, weather you are running a PAL or NTSC VIC20?

What was the Z8000 project mentioned on the page?

I noticed that the stairs are thinner in the original version of the game... is there a reason why in this VIC version they are wider? (not saying that you should modify them of course!) It's a quite simple reason. Many screen elements you are looking at in this implementation of Pitfall do not exi...

The guy bitches that the VIC basic lacks graphic commands. He's one of those guys that wants everything done for him.

Yes. It is also the Colecovision pallet, and the MSX pallet. It was a stock Texas Instruments graphics ship used in several computers and several game machines. More information: http://en.wikipedia.org/wiki/Texas_Instruments_TMS9918 The TMS9918 was used in systems like ColecoVision, CreatiVision (J...

The vintage machine can be purchased here: http://www.cadigital.com/computer.htm Not exactly a CoCo; Dragon is a European computer based on the CoCo design. The machine was modified for PAL video capability. http://www.cadigital.com/dragon.jpg And then this this version was modified back for NTSC ca...

I know of a graphic chip that has one of its 16 colors set aside as transparent, but I will allow others to guess.

I will throw everyone off by posting the original Macintosh pallet.