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Controllerhead

I took a quick look. Decoding the tiles is the first thing it does after vBlank wait and memory clear. GL

Controllerhead

Goose2k wrote: ↑
Thu Feb 11, 2021 9:39 am
Should that be 2020? Or 2020/21 maybe?

2020 with carry set

Controllerhead

Mesen doesn't seem to allow me to push A, B, Select, and Start simultaneously This is probably not Mesen. This is probably your keyboard =p Most do not register all of the keys all of the time. Some of the old school IBM PS2 port or high end gaming keyboards will register every key all of the time,...

Controllerhead

An important part about the "bit in the memory" is that it can be a relative hindrance to check B, but one place in the ROM is likely enough. Setting up anything else takes space which would probably be better "wasted" on a whole BSR instead. Once you RTI from your BRK the BRK is gone... So you wou...

Controllerhead

That video explains the mechanism behind the takeover happening, but it doesn't say anything about B. The BRK instruction gets ignored, and as a result, the BRK flag gets ignored. https://i.imgur.com/YkxR6tw.png Look man, just use a bit / byte in memory and save yourself the headaches and the cycles.

Controllerhead

If you are using BRK for some code that must happen (e.g. game logic) Hmm... there are no branching instructions for B and no way to set it besides BRK or manually manipulating the status register. To set it with BRK you are both jumping to the interrupt vector and setting the interrupt disable fla...

Controllerhead

DRW wrote: ↑
Mon Feb 15, 2021 7:10 am
A game with just boss fights?

Alien Soldier for Genesis is amazing. Brutally difficult and a technical tour-de-force.

NOW IS TIME TO THE 68000 HEART ON FIRE!
https://en.wikipedia.org/wiki/Alien_Soldier

Controllerhead

NesDev wiki states that NMI or IRQ that happens during specific moments of BRK execution can cause it to be effectively skipped. Yep. This is a "design quirk" of the 6502. The internal logic of the processor uses the BRK logic to process interrupts, so, if a BRK and an interrupt happen at the same ...

Controllerhead

My concern is that there is some map size limit I will hit, or some other unforeseen limit with this method of drawing columns. You're going to run into 2 problems storing 1x1 tile data: Storage capacity and Attribute data. The background only allows one palette for a 16x16px wide background area. ...

Controllerhead

I've just started programming with asm6 I would highly recommend ASM6F. It's a fork with more functionality. https://github.com/freem/asm6f/tree/master The killer feature is exporting labels directly to the Mesen debugger: https://pbs.twimg.com/media/EUF2V0VVAAYl2r0?format=png&name=large EDIT: Have...

Controllerhead

densming wrote: ↑
Thu Feb 11, 2021 9:14 am
background color

Controllerhead

I'm glad you got your scrolling engine up and running!

Looking forward to progress

Controllerhead

Fiskbit wrote: ↑
Sun Feb 07, 2021 4:21 pm
You've overloaded Y so that it's both an index for your source address (lda [sourceLow],y) and the current column (cpy SCREEN_X)

This. Your DrawColumn loop is spinning into oblivion. I would use a temporary memory address as a second counter instead.

Controllerhead

justin-rwx wrote: ↑
Sun Feb 07, 2021 3:22 pm
The full code below

mmmm not quite

Code: Select all

columnData:
  .incbin "testMap4.bin"

attribData:
  .incbin "SMBattrib.bin"

Controllerhead

so anyway...how can an nes game not be open source if we have rom files? Source code != ROM file. Source code implies the original build files, structure, comments, etc. Open source means that the author shares those or makes those public. A ROM is just the raw data that exists on a cartridge. Most...

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