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54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
//
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// PersonalityTraits.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 06/01/2023.
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// Copyright © 2023 Thomas Harte. All rights reserved.
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//
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#ifndef PersonalityTraits_hpp
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#define PersonalityTraits_hpp
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namespace TI {
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namespace TMS {
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// Genus determinants for the various personalityes.
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constexpr bool is_sega_vdp(Personality p) {
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return p >= Personality::SMSVDP;
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}
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constexpr bool is_yamaha_vdp(Personality p) {
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return p == Personality::V9938 || p == Personality::V9958;
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}
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// i.e. one with the original internal timings.
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constexpr bool is_classic_vdp(Personality p) {
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return
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p == Personality::TMS9918A ||
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p == Personality::SMSVDP ||
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p == Personality::SMS2VDP ||
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p == Personality::GGVDP;
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}
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constexpr size_t memory_size(Personality p) {
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switch(p) {
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case TI::TMS::TMS9918A:
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case TI::TMS::SMSVDP:
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case TI::TMS::SMS2VDP:
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case TI::TMS::GGVDP: return 16 * 1024;
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case TI::TMS::MDVDP: return 64 * 1024;
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case TI::TMS::V9938: return 128 * 1024;
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case TI::TMS::V9958: return 192 * 1024;
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}
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}
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constexpr uint16_t memory_mask(Personality p) {
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return (memory_size(p) >= 65536) ? 0xffff : uint16_t(memory_size(p) - 1);
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}
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}
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}
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#endif /* PersonalityTraits_hpp */
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