libwintandy

libwintandy provides small shared components for 8086 Windows 3.0 applications. The DOS library is libtandy and remains a separate project. The historical libtandywin/ source directory, header names and API names remain compatible; see naming and compatibility. The canonical shared sound driver is built in OEMSound. This library contains its consumer interfaces.

• Placement service supplies caller-owned normal window rectangles and recovery for the Windows XT window-moving desktop. It preserves minimized/maximized state without changing USER.EXE.
• Bounded canvas/damage helper is an opt-in caller-owned GDI module with optional monochrome surfaces; CANVAS30 is a separate small consumer.
• LWTANDY.H exposes the existing USER repaint helpers.
• LWAUDIO.H forwards the app-local MCI/raw-player interfaces.
• TPLAY supplies the guarded Windows XT HPXY/XRSYNC launcher used by Tandy Winamp.
• Current MIDI services and native results cover controllers, streamed SMF and paired speaker/PSG playback. Consumer packages use the stable Windows XT downloads.
• Default/Chamber banks provide explicit selection, persistent player choice and per-voice live reseeding through the existing SOUND/RAWCLK ownership path.
• MINIPLAY's separate format playback preview adds foreground VGM/VGZ and bounded MOD PSG arrangements through a negotiated ordered-burst RAWCLK interface. The old TCFRAME ABI and timer owner remain.

The current gzip-header revision passes 88 focused native checks in the Tandy HX8088/640KB/stockCGA/Windows3.0 real-mode fixture, plus 160 format host checks, 3271 backend checks and the MOD suite. Its original BUILD04 baseline retains the separate 171-check record; that full suite was not rerun on the header-only revision. See gzip compatibility. Source, original synthetic fixtures, host tests, build evidence and a source-inclusive runtime archive are available for review. Qualification and measured costs state the precise limits. This is an opt-in draft; earlier facade/source-only records remain labelled historical and the existing core preview is separate.

UI helpers use USER/GDI. The current audio fixture does not qualify PCjr, Windows 3.1 or protected mode. MOD uses square-wave tone substitutes rather than reproducing sampled timbres. Listening, physical audio and calibrated CPU performance are outside the recorded result.

The separate sound/ directory contains a pinned Windows 3.0 MIDI producer compatibility module used by the RAVE host preparation workflow. It is kept separate from the current Windows player engine in libtandywin/AUDIO/SOURCE/; it is not that player's vendored synth. See sound/README.md and sound/SOURCE.json for the producer scope, dependency boundary, file hashes and license notices.

See format architecture, RAWCLK burst API, build instructions and adoption notes. Project source is MIT; the RAWFILE format/table attribution retains LICENSE-TNDY.TXT. No OS/SDK/toolchain/fonts/ROMs, external sound driver, third-party songs, sample media or emulator images are bundled.

Native validation is recorded author-run evidence, not public CI or an independent reviewer rerun.