This commit introduces custom character spacing with a new fxconv
parameter "char-spacing". Word spacing is also tied to the width of the
space character (0x20). This removes the need for special semantics on
the space character, but requires that its size be specified with gray
pixels for proportional fonts.
This also fixes problems with the size of spaces in dsize() not being
correlated with their size during rendering, since on fx-9860G topti
already used the glyph's with as word spacing.
Since fxconv changes but gint's Makefile does not track updates to
external tools, a full rebuild of gint is required past this commit.
This commit introduces a large architectural change. Unlike previous
models of the fx-9860G series, the G-III models have a new user RAM
address different from 8801c000. The purpose of this change is to
dynamically load GMAPPED functions to this address by querying the TLB,
and call them through a function pointer whose address is determined
when loading.
Because of the overhead of using a function pointer in both assembly and
C code, changes have been made to avoid GMAPPED functions altogether.
Current, only cpu_setVBR() and gint_inth_callback() are left, the second
being used specifically to enable TLB misses when needed.
* Add a .gint.mappedrel section for the function pointers holding
addresses to GMAPPED functions; add function pointers for
cpu_setVBR() and gint_inth_callback()
* Move rram to address 0 instead of the hardcoded 0x8801c000
* Load GMAPPED functions at their linked address + the physical address
user RAM is mapped, to and compute their function pointers
* Remove the GMAPPED macro since no user function needs it anymore
* Add section flags "ax" (code) or "aw" (data) to every custom .section
in assembler code, as they default to unpredictable values that can
cause the section to be marked NOLOAD by the linker
* Update the main kernel, TMU, ETMU and RTC interrupt handlers to use
the new indirect calling method
This is made possible by new MMU functions giving direct access to the
physical area behind any virtualized page.
* Add an mmu_translate() function to query the TLB
* Add an mmu_uram() function to access user RAM from P1
The exception catching mechanism has been modified to avoid the use of
GMAPPED functions altogether.
* Set SR.BL=0 and SR.IMASK=15 before calling exception catchers
* Move gint_exc_skip() to normal text ROM
* Also fix registers not being popped off the stack before a panic
The timer drivers have also been modified to avoid GMAPPED functions.
* Invoke timer_stop() through gint_inth_callback() and move it to ROM
* Move and expand the ETMU driver to span 3 blocks at 0xd00 (ETMU4)
* Remove the timer_clear() function by inlining it into the ETMU handler
(TCR is provided within the storage block of each timer)
* Also split src/timer/inth.s into src/timer/inth-{tmu,etmu}.s
Additionally, VBR addresses are now determined at runtime to further
reduce hardcoded memory layout addresses in the linker script.
* Determine fx-9860G VBR addresses dynamically from mmu_uram()
* Determine fx-CG 50 VBR addresses dynamically from mmu_uram()
* Remove linker symbols for VBR addresses
Comments and documentation have been updated throughout the code to
reflect the changes.
This change introduces a new getkey_repeat_filter() function that can be
used to individually accept, deny or delay repeat events for specific
keys and timings.
* Turn on GCC's -O3 for bopti files
* Remove the bopti_render_noclip() step
* Use rbox as early as possible to avoid moving memory around
* A lot of local grinding
* Defined the single-column single-position (SCSP) situation where a
single column of the input is blit on a single position of the VRAM.
Provided optimized assembly and a specialized bopti_render_scsp()
function.
* Improved the rendered by reducing the amount of computation and
clarifying the semantics of the rbox.
* Separated rbox setup from clipping by making bopti_render_clip() a
purely abstract superset of bopti_render_noclip().
This new mechanism allows an add-in to be restarted after exiting by
just never exiting in the first place, calling gint_osmenu() instead.
This makes sure that we can relaunch the add-in immediately, which is
normally possible through an option in the OS though no OS-independent
method of setting it is currently known.
Because this is gint_osmenu(), known pitfalls apply. On all platforms,
it is necessary to prepare the first frame before leaving. On fx-CG 50,
the inevitable display border is also there.
Disables spread spectrum by default so that the frequency estimations of
the CPG driver (notably used by the timer driver and libprof) are more
accurate.
This commit changes the interrupt handler arrangement to support the PRI
interrupt on SH3 (a gap is needed between 0xaa0 and its helper).
It also introduces the use of the _gint_inth_callback function for the
callback, which provides dynamic TLB during the interrupt, and revealed
a bug about IMASK not being set automatically on SH3.
Finally, it sets the interrupt settings of the RTC more conservatively,
by wiping RCR1 and the carry, alarm and periodic interrupt flags during
initialization and context restoration.
This change fixes very weird bugs first observed with the RTC, related
to IMASK not being updated when an interrupt occurs to avoid
re-interruption.
On SH4 there is a CPUOPM setting that automatically sets IMASK to the
level of the accepted interrupt, which is so exactly what every kernel
needs that I can't figure out why this isn't the only behavior.
Turns out on SH3 it's not even an option. This commit sets IMASK to 15
when accepting a callback on SH3. This most notably prevents the gray
engine from updating the screen so callbacks need to be made very short.
This change modifies the font_t type to replace the concept of charset
with a more generic list of non-overlapping Unicode blocks defined by a
starting code point and a size.
It also takes advantage of the assembly feature of fxconv, introduced
for libimg long after the first version of topti, to support pointers in
the converted structure rather than having to tediously compute offsets
within a variable-size structure.
DGRAY_PUSH_ON/OFF will push the current gray engine state to a stack
before transitioning to on/off mode. DGRAY_POP will later recover the
saved state and transition back to it.
* Define dgray() to replace gray_start() and gray_stop()
* Introduce a mechanism to override the d*() functions rather than using
another set of functions, namely g*(). Gray rendering should now be
done with d*() (a compatibility macro for g*() is available until v2.1).
* Gray engine now reserves TMU0 at the start of the add-in to prevent
surprises if timers are exhausted, so it nevers fails to start
* Replace other gray engine functions with dgray_*()
* More general rendering functions (in render/) to lessen the burden of
porting them to the gray engine. As a consequence, dtext_opt(),
dprint_opt() and drect_border() are now available in the gray engine,
which was an omission from 230b796.
* Allow C_NONE in more functions, mainly on fx-CG 50
* Remove the now-unused dupdate_noint()
Since both platforms now have their VBR and gint-specific data loaded
along the add-in's data, the .gint.data section is entirely unused.
The .gint.bss section is still used for uninitialized objects (it has
different semantics than .bss which is initially cleared) and the
.gint.data.sh3 and .gint.bss.sh3 sections that are dropped on the
SH4-only fx-CG 50 are also still used.
This change puts an end to the illegal occupation of some random RAM
area, solving most of the return-to-menu issues, including (but not
limited to) random key presses, multiple return, and VBR being
overwritten.
There are still known return-to-menu issues on SH3 (mainly just
GetKeyWait() returning immediately to gint probably due to multiple
KEY_CTRL_MENU being injected), but nothing crashy.
This change moves interrupt handler from VBR + 0x640 to VBR + 0x200, in
the gap between the exception and TLB miss handlers.
This new scheme is not limited to VBR+0x200 .. VBR+0x400 as new large
block numbers can be used to jump over the TLB miss handler and the
interrupt handler entry points.
I have recenty discovered that the so-called "rram" section used by gint
to store its VBR space and a couple memory structures gets overwritten
when returning to the main menu. It is thus necessary to get rid of it
and store that data somewhere else.
My current lead is to have it at the start of the static RAM by querying
its address in the TLB. However, the static RAM is very small on SH3
(8k) so the VBR must be made more compact.
This change elaborates the event code translation scheme used on SH3 to
emulate SH4 event codes. It is now used to translate the event codes to
a gint-specific VBR layout that leaves no gaps and thus reduces the size
of the VBR space. The gint_inthandler() method has to be modified for
every new SH3 interrupt to maintain this scheme.
* Reduce the keyboard queue size from 64 to 32, which is more than
enough even for real-time games with multiple key presses.
* Pack the driver_event_t structure of the keyboard driver to make it 4
bytes rather than 6 bytes. Combined with the previous item, this saves
256 bytes off the BSS section (which is 3% of the SH3's static RAM).
* As part of a debugging attempt, updated the watchdog delay code in
iokbd_delay() to make it usable in the current version of gint.
* Restored port registers more aggressively in iokbd_row().
This change adds optimized versions of the core memory functions,
relying on 4-alignment, 2-alignment, and the SH4's unaligned move
instruction to (hopefully) attain good performance in all situations.
This change adds a new HWCALC model, HWCALC_FXCG_MANAGER, which
identifies Casio's official fx-CG Manager software. Both the Prizm and,
to my surprise, the fx-CG Manager use the old RAM address of 88000000
(P1) and a8000000 (P2) instead of the new fx-CG 50 address of 8c000000
(P1) and ac000000 (P2).
The VRAM is hence adjusted at startup to move hardcoded pointers into
the proper space. Added to the kernel moving the VBR space dynamically
on the Prizm, this allows gint to be fully compatible with these
platforms.
The fx-CG Manager is detected by its product ID made of 0xff.
Also adds a proper interface to the R61524 driver, even though it's not
any more complete than previously, and fixes an oversight where the
HWURAM entry of the kernel data array was no longer computed since the
TLB management change.
As of now, the fx-CG Manager still has a bug regarding return-to-menu
since returning from the main menu doesn't work very well and often
loops. This has been seen occasionally on some Graph 90+E so it's
unlikely to be a platform-specific problem.
This commit minimally changes the signature of timer_setup() to greatly
simplify timer management, allowing to user to let the library choose
available timers dynamically depending on the settings.
Gray quality is better on the Graph 35+E II, it still flickers a lot on
other models (as I remembered). There might be better settings out there
but I'm not sure we can reach the quality of the current Graph 35+E II
defaults. The Graph 75+E with which I tested might also be different
from other T6K11 such as the smaller Graph 35+E.
* Removed .pretext sections since the TLB is now entirely dynamic; left
only .text.entry for the start symbol.
* Reworked the main files of src/core to move the INTC to its own driver
and let the kernel handle only VBR space and CPU (now: VBR & CPUOPM).
* Moved src/core/gint.c to src/core/kernel.c and centralized all driver
loops that save or restore context for more robustness. This leaves
the callbacks of cpu_setVBR() (formerly gint_setvbr()) pretty short.
* Coalesced gint_switch_out() and gint_switch_in() into a single
function callback for cpu_setVBR().
* Added an abstraction of interrupt signals as an enumerated value so
that drivers no longer hardcode the IPR and IMR numbers and bits,
sometimes even with isSH3() due to differences in the SH7705.
* Changed the interrupt blocking method in cpu_setVBR() from SR.BL=1 to
SR.IMASK=15 so that TLB misses are still handled. This removes the
need for callback functions to be GMAPPED.
* Moved gint_osmenu() and its utilities to a new file src/core/osmenu.c.
This change includes three reliability improvements in handlers:
1. TMU handlers now actively check for the UNF flag to go low rather
than expecting it to do so right away.
2. CPUOPM.INTMU is now set so that IMASK it updated at every interrupt
(which is absolutely required for nested interrupts!).
3. gint_inth_callback() no longer performs transfers between user bank
and kernel bank while in user bank, because this is when interrupts
are enabled and thus likely to corrupt the kernel bank; rather, it
now does it while in kernel bank with interrupts disabled.
This change fixes a never-should-have-worked problem where the ETMU
interrupt handler loses track of the timer ID before attempting to call
timer_stop(), resulting in complete nonsense.
And also a similar problem in timer_wait().
This change introduces two new functions dtext_opt() and dprint_opt()
that have both color and alignment options. The regular dtext() and
dprint() have been changed to always used bg=C_NONE which is what most
calls want.
