ReC98/th02/snd/detmode.c

#pragma option -WX -zCSHARED -k-

#include "platform.h"
#include "x86real.h"
#include "libs/kaja/kaja.h"
#include "th02/snd/snd.h"

bool16 snd_determine_mode(void)
{
	_AH = PMD_GET_DRIVER_TYPE_AND_VERSION;
	geninterrupt(PMD);
	_BX = false;
	if(_AL != 0xFF) {
		_BX++;
		snd_fm_possible = true;
	} else {
		_BL = snd_midi_active;
	}
	snd_active = _BL;
	return _BX;
}
#pragma codestring "\x90"
[Translation unit catch-up] [th03] snd_determine_mode() Wow, it's -WX, and no workaround necessary! Part of P0138, funded by [Anonymous] and Blue Bolt. 2021-04-10 15:56:06 +00:00			`#pragma option -WX -zCSHARED -k-`
[Separate translation units] [th02] snd_determine_mode() Perfectly decompilable with pseudo-registers. Why did I decide against them in 2015? Part of P0133, funded by [Anonymous]. 2021-01-28 19:34:05 +00:00
			`#include "platform.h"`
[Maintenance] Copy <dos.h>'s 16-bit x86 Real Mode declarations to a new file DOS is not the same thing as the underlying CPU, after all. A separate file not only indicates to future port authors which parts of the code are x86-specific, but it also speeds up build times… … in theory, because removing 677 lines from 49 files each doesn't seem to speed up the build as much as I had hoped? But apparently my whole system mysteriously got faster in the meantime, and I was getting 22-23 seconds for the entire repo even before this commit. Good enough. Part of P0134, funded by [Anonymous]. 2021-02-07 20:03:00 +00:00			`#include "x86real.h"`
[Separate translation units] [th02] snd_determine_mode() Perfectly decompilable with pseudo-registers. Why did I decide against them in 2015? Part of P0133, funded by [Anonymous]. 2021-01-28 19:34:05 +00:00			`#include "libs/kaja/kaja.h"`
			`#include "th02/snd/snd.h"`

			`bool16 snd_determine_mode(void)`
			`{`
[Maintenance] Document relevant return values of PMD's AH=09h function I'll leave a comprehensive, fully documented enum to interested contributors, since that would involve research into basically the entire history of the PC-9800 series, and even the clearly out-of-scope PC-88VA. After all, PC-98 Touhou only needs to distinguish "OPN- / PC-9801-26K-compatible sound sources handled by PMD.COM" from "everything else", since all other PMD varieties are OPNA- / PC-9801-86-compatible. Part of P0139, funded by [Anonymous]. 2021-04-30 18:15:21 +00:00			`_AH = PMD_GET_DRIVER_TYPE_AND_VERSION;`
[Separate translation units] [th02] snd_determine_mode() Perfectly decompilable with pseudo-registers. Why did I decide against them in 2015? Part of P0133, funded by [Anonymous]. 2021-01-28 19:34:05 +00:00			`geninterrupt(PMD);`
			`_BX = false;`
			`if(_AL != 0xFF) {`
			`_BX++;`
			`snd_fm_possible = true;`
			`} else {`
			`_BL = snd_midi_active;`
			`}`
			`snd_active = _BL;`
			`return _BX;`
			`}`
			`#pragma codestring "\x90"`