---------------------------------------
vsmile_cart: Abenteuer im ABC Park (GER), Finding Nemo - De Wonderwereld Van Nemo (NL), Mickey Mouse Clubhouse (NL), Shrek De Derde - Arthurs Schooldag Avontuur (NL) [Team Europe]
device_gfx_interface does two things:
- go from a possibly weird rom layout to a one-byte-per-pixel tiled layout
- draw the tiles so created
The second part requires a palette, but the first doesn't. And
low-level emulations of individual graphic chips (konami tilemap or
sprite generators for instance) are not supposed to care about the
palette. They just output bits which are partly indexes into
palettes, and partly not, and in any case become pen ids only much
further in the rendering chain. But they need access to the decoding
step, because one-byte-per-pixel is real nice.. So now such a device,
which inherits from device_gfx_interface, can call
set_palette_disable(true) and no palette tag will be required.
Calling the draw functions will segfault though.
As a side effect, the gfx_element constructor now takes a palette
pointer instead of a reference, since it's now optional.
* Fixed issue when the hash length is zero
The following is illegal, even if no elements in the pointer are accessed:
std::vector<my_struct> my_vec(0); // create an empty std::vector
my_struct *ptr = &my_vec[0];
While this is a degenerate scenario, this should be fixed
-----------------------------------
ibm5150.xml,ibm5170.xml: Many IBM PC-DOS sets [Justin Kerk]
(nw) move some pc-compatible sets from ibm5170 to ibm5150
sound board, completing the tromba circuit
(nw) I'm not sure whether the model works properly or not, but in the
circuit where it's used, I don't think it can work properly with the
current TTL output model. A capacitor is charged by the Q output of a
74LS74 flipflop (U3A) until the voltage passes the Schmitt trigger's
threshold, causing it to reset the flipflop. However, the positive
trigger voltage of the Schmitt trigger is 1.6V, but our TTL output model
has a high output voltage of 1.0V (see nl_base.cpp:89). I realise the
simplified model of TTL logic with high impedance inputs and outputs
behaving as though thery're loaded is convenient and fast to simulate,
but it's not detailed enough for applications like this where
7400-series chips are used in analog circuitry. This is what held me up
last time I tried adding a netlist for this sound board.
