Denial

Are you looking for a chip or a ready made cartridge here? And what do you refer to when you write EEPROM? A flash memory? "an expansion cartridge", and I'm not sure what EEPROM technologies exist other than Flash, so I'm looking for a cartridge with one or more flash EEPROM devices, and ...

I don't suppose there exists an expansion cartridge that is one (or preferably more) largest EEPROMs setup to map into the $A000-$AFFF and $B000-$BFFF spaces, but with banking registers so you can select which block of EEPROM appears in each of the ranges? Are you looking for a chip or a ready made...

MrSterlingBS wrote: ↑Thu May 30, 2024 6:40 am Hi,

here is my first demo with stable raster bars.
The Music runs via the IRQ.
The main loop is the raster bar effect.

I borrowed the music from the demo ALPHA RANGE 89.
The source code is included.

Have fun

Nicely done!

The music takes me back. I wrote that.

The one I posted here should be easily extendible to any resonable bit width: http://sleepingelephant.com/ipw-web/bul ... 85#p114085

As written... I am using it in demo so just IRQ Kernel used. 😉 Thanks will look into the other thread. If you are using only IRQ and nothing else then all of zp is free and most of the stack, just be sure to set the stack pointer to a convenient spot. $0314 and $0315 must be set up at the time of I...

In its simplest form you can just hook your routine in $0314/$0315 and at the end of your routine just call whatever was in $0314/$0315 before (usually $eabf) to finish up. Without fiddling with the timers this will not be in the vertical blanking but good enough for starting out. You can use the ta...

The actual implementation will be different depending on how you partition what BASIC does and what the ML interrupt does. In general the interrupt will pause the BASIC program very briefly (~1 ms) each 20 ms to perform some task you desire. This could be doing the equivalent of X=X-1 & POKE, on...

Sure, you can do any mix of BASIC + ML. For smooth movement you'll need to do an interrupt routine to perform that in the background. Typically you'd set up a timer to fire an IRQ once each vertical blanking, and there handle the positioning. If you are doing this from BASIC you should consider maki...

I agree with Mike. This looks overly complicated and has all sorts of incorrect assumptions built in to it.

It's seldom a good strategy to code a complete solution and then debug it. Why not start to get a simple two key input working using $FFE4 and then add the cursor + positioning?

There's also some discussion this thread: http://sleepingelephant.com/ipw-web/bul ... p?p=114085

SN7406 is a 7406 manufactured by Texas Instruments. Should be equivalent. Who manufactured the one that's there now?

Scramble is my go to.

There is a page crossing, yes. This will make the branches take one additional cycle when taken, but this is normally not an error. Perhaps you have some flag set to the assembler to make this error out?

One technique you should look for is drag soldering/smear soldering. I've never done this myself, but I've seen it done. The general idea is to put solder on by dragging along the pins and relying on capillary action to get the solder to where it is supposed to be. You probably want a decent solder ...

Well, that's been a hard month. Poor health and a mad rush at work have kept me from the project, but boards and components have been ordered now, so let's see what happens. I've got some 48-pin (I think), 0.5mm pin pitch DIL packages to solder (3 of them), so that'll be interesting - Does anybody ...