Add MBC registers, combined `PAD` masks, and color bits (#63)

* Added registers and constants for more MBCs
* Added `PAD_*` constants for combined button and Control Pad masks
* Added `B_COLOR_*` red/green/blue bit numbers
* Corrected comments on `B_BG_PRIO` and `B_OAM_PRIO`

Change the bit number/flag naming conventions (#58)

* Change the bit number/flag naming conventions
* Fix whitespace and comments
* Add `LCDC_*` flag constants separate from flag values
* Deprecate `rSMBK`, moving it into `hardware_compat.inc`
* Shorten `PRIORITY` and `WINDOW` to `PRIO` and `WIN`
* Add `BGA_*` constants for CGB-only BG tile attributes
* Just name them `BG_` not `BGA_`, corresponding to `OAM_` not `OAMA_`
* `MASK` is not a conventional suffix

Co-authored-by: Eldred Habert <[email protected]>

Define `SCRN_B` and `SCRN_V_B` constants (#57)

Release hardware.inc version 4.11 (#54)

* Add `rSYS` alias for `rKEY0`

* Add separate bit number and flag constants for each audio channel

* Refactored the `rev_Check_hardware_inc` macro

* Add comments in rev_Check_hardware_inc

Co-authored-by: Eldred Habert <[email protected]>

* Update date

---------

Co-authored-by: Eldred Habert <[email protected]>

Release hardware.inc version 4.10 (#50)

* Update actions/checkout to v4

* Update hardware.inc to version 4.10.0

- Add more constants
- Deprecate some alias constants
- Move change log to HISTORY.md file
- Regroup and reformat constants
- Define `F`lags in terms of shifted `B`its

* Use shorter register heading dash comments

* Update more registers

* More registers

* Add HDMA registers

* Fix VDMA (aka HDMA or GDMA) constants

* Finish $FFxx registers

* Finish cartridge MBC registers

* Finish deprecated constants

* Start porting some constants from gb-bootroms

* Finish CPU values on bootup and interrupt vector addresses

* Finish screen-related constants

* Finish OAM constants

* Fix spacing

* Update change log

* Add `BGP_SGB_TRANSFER`

* Consistently use `[r/w]` not `[rw]`

* Comment on how to fill header with zeros

* Note which values RGBFIX "sets" by not overwriting zeros

* Remove extra space

* Define `rRTCREG`

* Fix comment

* Updated history change log

* Suggestions from code review

* Use `rb` for OAM field offsets

* Update date of last revision

Correct `CART_ROM_MBC5_BAT` to `CART_ROM_MBC5_RAM` (#43)

Add CC0 notice and repository link

Signed-off-by: Masanori Ogino <[email protected]>

Add Object Priority Mode Register (#39)

* Add rOPRI

Co-authored-by: Eldred Habert <[email protected]>
Co-authored-by: Antonio Vivace <[email protected]>

readme: rewrite introduction, update contributors

Update constants to use 0.5.0's `DEF` (#11)

Also updated the Nintendo logo macro.

Bumped major version to 4.0, since this breaks compatibility with RGBDS versions prior to 0.5.0.

3 -> 03, updated rev check macro

* Deprecate `IEF_LCDC` in favor of `IEF_STAT`

* Adde check for outdated RGBDS versions

* Update include guard to use `EQU`