gint/TODO

# Since compatibility

Another, more recent list of things to do:
- Complete memory functions in [core/memory.c]
- Finish the boot log in <core/bootlog.h>
- Finish the boot log in [core/bootlog.c]
- Document the SH7305 PFC in <gint/mpu/pfc.h>
- Change the description of the version number in <gint/gint.h>
- Define the version number from full Git info
- Do this display in <gint/display-fx.h> and <gint/display-cg.h>
- Remove all mentions of GINT_LAX in the code
- Write exception handlers
- Do overclock in [clock/]
- Test getkey()

* Make keysc/keysc.c/state static and review forgotten global variables
* Find out what happened to the clock frequency on fxcg50
* Implement profiling
* Save and restore interrupt masks
* More keyboard

Strange, (irreproducible?) SysERRORs on SH3?
- Happened when dealing with overclock and after a transfer
- SysERROR when add-in fully returns, nothing during execution
- Affects all add-ins of the calculator!

* Make sure interrupt for extra timers is masked when you ctx_restore to avoid
  interrupts

* For modules, use #define TMU ((tmu_t *)0xdeadbeef)) instead of tmu_t *TMU
* Don't hardcode fx-cg50 stack address in fxcg50.ld for Prizm compatibility
* Implement the gint_switch()
* File management
* Drawing functions, bopti and tales
* Gray engine
* Overclock
* Add a driver init function to the r61524 driver.
* Finish the bootlog and use the keyboard to control it.
* Save driver contexts on the stack in gint_pause().
* Write the core memory functions.
- Allow arbitrary code in gint_pause() instead of just main menu?
- Dynamically detect P1 static RAM in TLB for runtime Prizm compatibility.
* Use a solid API for boot-time printing (or just use fxlib)
- Use qdiv10() (there should be no __sdivsi3 in gint)
  (bootlog, timer_delay(), getkey_repeat(), int2bcd())
* Load an exception handler and a TLB miss handler.

# Before compatibility

Bugs to fix:
-  Alignment of ALL .data / .rodata files is required to ensure converted data
   is properly aligned -> Ok using ALIGN(4)
-  Ensure heap data is freed when a task-switch results in leaving the app (?)

Things to do before 1.0:
-  bopti:	Test partial transparency
-  perf:	Try 284x124 at (-60, -28) (all disadvantages)
-  project:	Check size of *all* library structures
-  time:	Compute CLOCKS_PER_SEC

Things to do later:
-  bopti:	Implement blending modes for monochrome bitmaps
-  clock:	Only measure if requires as option, otherwise trust {FTune}
-  clock:	Handle overclock (relaunch clocks when overclocking)
-  clock:	Split code into several files, change clock_config_t type
-  core:	Remove redundant code linked to environment saves
-  display:	Try to make this module lighter (lots of code in text section)
-  esper:	Cleaner playback, synthesizing
-  events:	Allow customization of keyboard event system (option to return
   |		events with modifiers, etc)
-  events:	Generate keyboard events on-the-fly by reading state arrays,
   |		allowing both a faster interrupt and avoiding supressing other
   |		events inside getkey() and multigetkey()
-  gray:	Same as display, it's quite heavy
-  serial:	Implement a driver
-  stdio:	More serious formatted printing functions and headers
-  string:	Use cmp/str to implement memchr() (assembler examples)
-  string:	Do some tests for memcmp() and memcpy()
-  usb:		Implement a driver

Things to investigate:
-  Registers that may need to be saved within setjmp()

Possibly useful modules:
-  DMAC
-  SCIF, SCIFA
-  TPU
-  USB
-  CMT on SH7305, WDT on SH7705