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platform, small fixes for Pico, updated readme

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This commit is contained in:
kub 2024-03-26 22:36:21 +01:00
parent 0b12a5a00a
commit 62e763ecdd
3 changed files with 32 additions and 4 deletions
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32
platform/base_readme.txt
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@ -72,6 +72,33 @@ When using CUE/BIN, you must load .cue file from the menu, or else the emu will
not find audio tracks.
How to run Sega Pico games
--------------------------
The Pico was special in that it had a large touchpad with an associated pen, and
so-called storyware, a combination of a cartridge with a book with up to 6 pages
on which the pen could also be used.
Most storywares used the touchpad with the pen as a pointer device, showing a
pointer icon on the screen when the pen was on the touchpad which could be moved
around. The pen has a dedicated button which was often used to select something
under the pointer icon, much like a mouse button.
However, a few games also had an overlay for the touchpad.
PicoDrive supports displaying both the storyware pages as well as a pad overlay.
They must be in png format and named like the storyware ROM without the
extension, plus "_<n>.png" for the storyware page <n>, and "_pad.png" for a pad
overlay. Storyware page images should have an aspect ration of 2:1, pad images
should have 4:3. All images can have arbitrary resolution and are automatically
scaled to fit the screen.
There are 2 menu actions for switching to pages or pad which will automatically
display the images if they are available. To allow for proper pen positioning
there is also an action for having the pen on the page/touchpad or not. Pen
positioning is done through the D-pad if the screen has been switched to either
pages or pad.
Other important stuff
---------------------
@ -528,8 +555,9 @@ main 68k @ 7.6MHz: yes, Cyclone (on 32 bit ARM CPUs) or FAME/C core
VDP: yes, except some quirks and mode 4, not used by games
SN76489 PSG: yes, MAME core
ADPCM: yes, MAME core
Pico Pen: yes, to some extend
Pico Storyware pages: no
Pico Pen: yes
Pico Storyware pages: yes
Pico pad overlays: yes
Problems / limitations

2
platform/libpicofe

@ -1 +1 @@
Subproject commit 4563c13167deb97851397789bf2fb95bb44cf1ed
Subproject commit 697806c41dccf0adb0a3a35171f6eff9a9191240

2
platform/libretro/libretro.c
View file

@ -1466,7 +1466,7 @@ bool retro_load_game(const struct retro_game_info *info)
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Red Button" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Pen Button" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Pen State" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Pen on Storyware" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "Pen on Storyware" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Pen on Pad" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "Previous Page" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Next Page" },