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Amps up colour content a little.

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This commit is contained in:
Thomas Harte 2018-09-30 20:47:26 -04:00
parent e9328d819e
commit 91aa8f9295
2 changed files with 17 additions and 4 deletions
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7
Components/9918/9918.cpp
View File

@ -688,9 +688,10 @@ void TMS9918::set_register(int address, uint8_t value) {
if(master_system_.cram_is_selected) {
master_system_.colour_ram[ram_pointer_ & 0x1f] = palette_pack(
static_cast<uint8_t>((value & 0x03) << 6),
static_cast<uint8_t>((value & 0x0c) << 4),
static_cast<uint8_t>((value & 0x30) << 2));
static_cast<uint8_t>(((value >> 0) & 3) * 255 / 3),
static_cast<uint8_t>(((value >> 2) & 3) * 255 / 3),
static_cast<uint8_t>(((value >> 4) & 3) * 255 / 3)
);
++ram_pointer_;
// TODO: insert a CRAM dot here.
} else {

14
Components/9918/Implementation/9918Base.hpp
View File

@ -222,7 +222,9 @@ class Base {
#define fetch_tile_name(column) {\
size_t address = pattern_address_base + ((column) << 1); \
master_system_.names[column].flags = ram_[address+1]; \
master_system_.names[column].offset = static_cast<size_t>((((master_system_.names[column].flags&1) << 8) | ram_[address]) << 5) + sub_row[(master_system_.names[column].flags&4) >> 2]; \
master_system_.names[column].offset = static_cast<size_t>( \
(((master_system_.names[column].flags&1) << 8) | ram_[address]) << 5 \
) + sub_row[(master_system_.names[column].flags&4) >> 2]; \
}
#define fetch_tile(column) {\
@ -274,6 +276,13 @@ class Base {
const size_t pattern_address_base = (pattern_name_address_ | size_t(0x3ff)) & static_cast<size_t>(((scrolled_row & ~7) << 3) | 0x3800);
const size_t sub_row[2] = {static_cast<size_t>((scrolled_row & 7) << 2), 28 ^ static_cast<size_t>((scrolled_row & 7) << 2)};
/*
To add, relative to the times below:
hsync active at cycle 14;
hsync inactive at cycle 27;
*/
switch(start) {
default:
sprite_render_block(0, 0);
@ -319,6 +328,9 @@ class Base {
#undef external_slot
#undef slot
void draw_sms(int start, int end) {
}
};
}