Denial

Mike wrote:The 4K7 pull-ups on the original /RAMx signals are on the soldering side of the mainboard.

I don't have any pull-ups for this since the RAMx signals from the decoder are still connected to the 74LS133.

I have had success making a plug-in board with RAM on it, that goes into the socket for the character rom.

I have built this before. I had two banks of 4K for the character rom space, using a full 8K. All the signals come from the character rom socket. By using banking for the kernal and basic roms, I was able to convert the "Fast Assembler" for the 64, to the VIC and it works great. I had a co...

I bought my first VIC 20 in 1983 and I still have it. It's undergoing a refurb.

I think I found the problem with T8. A clue awaits in the next issue of C=Hacking with the second installment of "A Different Perspective...".

Here we go again. I am trying to figure out the right way to do a product to sum using three terms. Is there a specific order in which to apply the identities? For example: sin(x)sin(y)cos(z) . Does it matter where you start applying the identity? Do I apply it to sin(x)sin(y) first, or sin(y)cos(z)...

Hijacking is ok with me. We all learn from it.

On the first two equations, I was able to reduce them down to: A. (cos(z-y)+cos(z+y))/2 B. (sin(z+y)+sin(z-y))/2 In the article they come up with t1=sy-sz and t2=sy+sz, yet the above that I came up with t1=sz-sy and t2=sz+sy. Did I do something wrong? How did they come up with that? Do I just turn t...

Thank you for the help.

I know there's easier ways, I'm just curious of the math behind it, and since I've always programmed in assembly language on the old home computers of the 80's and 90's, I want to finally get back to it.

http://www.ffd2.com/fridge/chacking/c=hacking8.txt I'm looking for help with the article: " A Different Perspective: Three-Dimensional Graphics on the C64" Is there anyone that is familiar with this process? [cos(z) -sin(z) 0] [cos(y) 0 sin(y) ] [sin(z) cos(z) 0] X [ 0 1 0 ] = [ 0 0 1] [-...

If you are still searching for another option, I have one that I use. I wired in another decoder, like a 74LS139, and used IO0 to select this decoder. This is the IO space used for the VIA's. This will break up this IO section into four pieces: $9000, $9100, $9200, $9300. This opens up address range...

I've heard that banks above 0 cannot be saved on commodore drives, so it must be a CMD drive is necessary to save banks above bank 0. Does anyone know an email for Maurice Randall, formerly of CMD?

Does anyone know if there was any way to load/save code that was in any bank other than bank 0. Was the extra memory above 64K used for programs, or just used for a ramdisk?

Has anyone put the Software Sprite Stack in CBMProgStudio? I would hate to convert it if someone has already done it.

From all I'm reading, I am surprised nobody has looked at the roms. If it starts ok when it's turned on, then I might lean towards the rom that is lower in memory first.