6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-11-29 12:50:28 +00:00
Code Issues Projects Releases Wiki Activity

Merge pull request #885 from TomHarte/MasterSystemBlue

Browse Source 
Tweak Master System blue scale.
This commit is contained in:
Thomas Harte 2021-03-19 08:48:47 -04:00 committed by GitHub
commit 60a0f8e824
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
Components/9918/Implementation/9918Base.hpp
View File

@ -350,11 +350,14 @@ class Base {
case MemoryAccess::Write: case MemoryAccess::Write:
if(master_system_.cram_is_selected) { if(master_system_.cram_is_selected) {
// Adjust the palette. // Adjust the palette. In a Master System blue has a slightly different
// scale; cf. https://www.retrorgb.com/sega-master-system-non-linear-blue-channel-findings.html
constexpr uint8_t rg_scale[] = {0, 85, 170, 255};
constexpr uint8_t b_scale[] = {0, 104, 170, 255};
master_system_.colour_ram[ram_pointer_ & 0x1f] = palette_pack( master_system_.colour_ram[ram_pointer_ & 0x1f] = palette_pack(
uint8_t(((read_ahead_buffer_ >> 0) & 3) * 255 / 3), rg_scale[(read_ahead_buffer_ >> 0) & 3],
uint8_t(((read_ahead_buffer_ >> 2) & 3) * 255 / 3), rg_scale[(read_ahead_buffer_ >> 2) & 3],
uint8_t(((read_ahead_buffer_ >> 4) & 3) * 255 / 3) b_scale[(read_ahead_buffer_ >> 4) & 3]
); );
// Schedule a CRAM dot; this is scheduled for wherever it should appear // Schedule a CRAM dot; this is scheduled for wherever it should appear