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PCG mode 3 で UTF-16BE の2 byte文字を表示する - #148
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FG属性 bit 7:6 (WIDE_KIND) と WIDE_FONT_BASE (0xF010-0xF013) を追加。 Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016FQsvPujdD6SN6UqAAw2U4
This was referenced Oct 24, 2026
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Requested by src3453 · project thread
Closes #147
変更
WIDE_KIND（00=1 byte、01=MSB、10=LSB、11=予約で00扱い）。隣り合う01,10の対を UTF-16BE の1文字として左右 8 pixel ずつ描画。対のない半端なセルは1 byteフォントで描画。WIDE_FONT_BASE（0xF010〜0xF013、32-bit、reset 0）が指すVRAM上の領域から読む。code unit×32 byte（16行×2 byte、Unifont ROM と同形式）。VRAM終端超えは背景色。doc/spec_VDP.md、SDK 定数（pcg.h）、MEMORY.md を更新。tests/vdp_pcg_wide.rsを追加。cargo test --test vdp_pcg_wide --test vdp_pcg_scroll通過。未対応
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