Galaxy Force II: Mapping the port bits used to provide motor movement feedback signals such as Up/Down/Left/Right limit switches.
Galaxy Force II: Adding gforce_output_cb1 (the values written there seem to select the meaning of some of the PORTC bits related to motor control)
G-LOC: Mapping portbits related to the moving cabinet limit switches.
Power Drift: Portbits for Limit & Safety switches
enabled the RDP range checks by default for now (nw)

this reports some out-of-bounds accesses only ubsan would report
otherwise - happens with e.g. n64 -cart nbaliv99u
Fixed MT04990 (nw)
bit of a driver specific hack to work around what seems to be a core problem when you have multiple screens of different refresh rates and partial updates.

not marked the game as working yet because the side screens seem to crash when you pick the roadster
Update README.md

Update of readme
notes
(mess) pc9801: pipe bitmap 7220 vram access though grcg, enable ready line which fixes disk change detection (nw)
---
Also disabled reads while grcg is in rmw mode, this I'm not 100% certain about and needs more testing.
let's map merlin number keys to numpad too
added tms0970 device
upd7810: fix bug introduced in extended timer simplification
upd7810: ECNT clear control happens after capture control
upd7810: fix and export timer/event counter output

The timer/event counter outputs (CO0 and CO1) are set differently when
EOM changes and when a timer update occurs. Most EOM values are
cleared on use. The document at [0] is confusing regarding these bits.
An older document [1], easier to understand, was used instead.

[0] NEC Electronics User's Manual, April 1987
[1] NEC uCOM-87AD Family 8-Bit Microcomputers uPD78C1X Users Manual
tumbleb.c: flip_screen_set() automatically flips tilemaps (nw)
Merge pull request #37 from ramiropolla/upd7810

upd7810: fix and improve timer/event counter
(MESS) softlist: Added new lists for Colour Genie, DAI Personal Computer and Jupiter Ace cassettes. [Riley110]
(MESS) compclr2_flop: Added a few additional images. [Riley110]

out of whatsnew: I took the chance to improve software descriptions in compclr2_flop, but there is still a lot of space
for improvements :)
tilemap.c: Respect gfx_element::colors() just like drawgfx.c does. Add temporary assert to catch regressions (i.e. drivers that didn't define their gfx elements correctly) (nw)
Add missing closing tag.