Denial

Welcome back!

Nothing beats the real iron.

There's a nice sticky thread here in the Programming Section about ROM calls and other tricks . Within that thread, SYS57809 to set up file name and device address to load and save blocks of memory was pointed out in this post dating from 2006. From assembly the KERNAL routines SETLFS ($FFBA) and SE...

Aleksi and Viznut are both registered here, but you can count their posts by the fingers of two hands (and maybe the feet's toes, too).

eslapion wrote:Sink your teeth in the tape version of paratrooper.

Or the tap of Las Vegas 20 (for +16K VIC-20), from which I could extract a single file *.prg some years ago.

tlr, if you are also interested in this one, just PM me your e-mail address.

Witzo, pallas, you two guys are aware that there's another sticky thread here to discuss BasEdit.net on?

Pedro, Unless the game has no protection, the type of conversion you want to do is more or less a matter of cracking the software you want to convert. just to give you a small hint at what is involved in this: - one would at first simply load in the game as normal, checking the type of the autostart...

This is probably for compatibility with self modifying code cartridges but as demonstrated with the game Crazy Antics, you MUST place in read-only mode ALL the RAM for full compatibility with dumped cartridges. I had to try this out. With the NTSC dump on zimmers, I could successfully run K-razy An...

Furthermore I'm trying to comprehend the concept of generating A13 and A14 out of BLK1-3, which Mike has given me some insight already. You need to differentiate between the address range of the 6502 and the address range of the RAM chip. CA0 .. CA13 are the lower 14 bits of the C PU A ddress-Bus e...

Indeed there are different ways to combine /BLK1, /BLK2, /BLK3 and /BLK5 to form A13, A14 and /CS. The only prerequisite is, that one of the /BLKx going low results in a unique one of the four possible combinations of A13, A14; and if any one of the /BLKx signals goes low, so should also do /CS. Tak...

I didn't put the resistor network in place, but it already works. Without the resistor network, only the inputs of UD9 remain to define the signal level of the original /RAMx lines on the mainboard. UD9 itself regards these open lines as having H-level (but only barely), for this reason the VIC-20 ...

In my VIC-20, I also have a MOS 6502B. That's just the variant of the 6502 rated for 3 MHz (bare 6502: 1 MHz, 6502A: 2 MHz). Of course it also runs at lower frequencies like the ~1 MHz of the VIC-20. Commodore just used any CPU that was available. The variant of the 6502 used in the 8-bit Ataris and...

Witzo wrote:Or was it [...]?

In CBM BASIC, -1 for true, 0 for false.

Just two points to these two lines of the program: 370 if a$<>"" then print #5,chr$(t%(asc(a$))); [...] 400 if(peek(37151)and 64)=1 then 400 Line 370: normally, BASIC V2 isn't too picky about the placement of spaces, but in the case of PRINT# and INPUT#, the hash character actually is part...

So I have a vic-20 (with dynamic ram) which is faster than a c64 because the c64 has dynamic ram. Erm, no. On the C64, the VIC-II is responsible for DRAM refresh. For this it does 5 refresh cycles on each raster line, during horizontal retrace. What slows down the CPU a bit, is the extra DMA necess...

Z0rbVIC wrote:How can I bump that up for a 16 bit address in hex?

I deliberately left that as exercise.