Denial

I tried to load it about 5 times with no success [...] That happens because of a wrong load address in the *.prg file. Saved BASIC programs (also ML programs with a BASIC stub) are supposed to start at $120 1 with a +8K (or bigger) RAM expansion. The byte containing 0 at $1200 is not saved along wi...

Here's my remark to the cross-posted copy of the type-in listing in another thread: (link)

Now how about this one?



The marked top-left colour is transparent.

freshlamb wrote:Mike has also uploaded a NTSC version of the VFLI disk and tools.

The archive can be downloaded here: vfli_ntsc_prototype.zip.

As I wrote earlier, the resolution of 184x208 pixels is intended as stop-gap measure until I find time to implement the 168x384i display routine.

Hmm..., this one employs an EOR mask, but it's longer and needs two temporaries: STA temp LSR A EOR temp AND #$55 STA temp2 ASL A ORA temp2 EOR temp If you don't mind undocumented opcodes, you can replace the instruction pair ASL A/ORA temp2 with SLO temp2 . The instruction pair LSR A/EOR temp also ...

@wimoos: How about these two? LDX #4 ASL A .loop PHP ASL A ADC #0 PLP ROL A DEX BNE loop TAY AND #$55 ASL A STA temp TYA AND #$AA LSR A ORA temp ;) This would be time critical so perhaps a look up table might be a good idea, although I would need a separate table per required set of mappings I guess...

wimoos wrote:How about this one ? Source and destination both kept in A

It does not work as intended.

%01 and %10 are mapped to %01 and %11 is mapped to %10.

That's a nice solution indeed. It uses the Accumulator as temporary storage for the carry flag (ROL A and LSR A could be replaced by PHP and PLP to illustrate that better, but that would of course cost some cycles). And no need to load A with 0 four times My variant is slightly more flexible though,...

If it has to be fast , don't bother with saving memory. Use a table with all 256 byte values. Otherwise: LDX #4 LDA #0 .loop ASL src ROL A ASL src ROL A TAY LDA table,Y ASL A ROL dst ASL A ROL dst DEX BNE loop .table EQUB &00:EQUB &80:EQUB &40:EQUB &C0 Ideally, 'src' and 'dst' should...

RJBowman wrote:Maybe someone could make a Q-Bert game that doesn't look like crap.

Or Mappy; one of my all time favorites.

Or an all-text downhill skiing game in BASIC. Yeah, someone should do that.

I'm glad you volunteer to spend some of your precious spare time to make all these games happen.

The metal labels cannot shield RF. For this to work well, even connecting the labels to ground would not be sufficient, it also would have required a completely metalized cartridge case. For a similar reason, the metalized cardboard 'RF shield' is not effective, as the RF can leak out to all sides: ...

metalfoot76VIC wrote:I really need to get my creative juices flowing and make something [...]

Albert Einstein wrote:Work is 1% inspiration plus 99% transpiration.

Would [SJLoad-20 V8] also work with a "standard" RAM-expansion from $9800-$a000 or even from a ROM placed there? Most probably, yes. Boray, as an example of use I had SJLoad-20 V7 integrated into my panning VFLI viewer . Here the $B000 version (slightly renamed) is put on the *.d64, and v...

Here's my mirror copy of SJLoad-20 V7.

Here's SJLOAD-20 V7 (d/l at the end of first post). It comes with 2 pre-assembled binaries which load to $0400 or $B000, and are started with SYS1024 and SYS45056, respectively. The $0400 version can effectively hide in the lower 3K area, when that one is blocked from BASIC use by a RAM expansion in...