- Improve PPIDE Device Detection

- Some PPI chips were falsely detecting the presence of an IDE device.  Added code to preset PPI register with a value that avoids false positives.

Source/Doc/Build.cmd

@@ -11,12 +11,12 @@ set PATH=%TOOLS%\gpp;%PATH%
 
 if not "%1"=="" (call :GenDoc %1 & goto :eof)
 
-call :GenDoc ReadMe
-call :GenDoc UserGuide
-call :GenDoc SystemGuide
-call :GenDoc Applications
-call :GenDoc Catalog
-call :GenDoc Errata
+call :GenDoc ReadMe || exit /b
+call :GenDoc UserGuide || exit /b
+call :GenDoc SystemGuide || exit /b
+call :GenDoc Applications || exit /b
+call :GenDoc Catalog || exit /b
+call :GenDoc Errata || exit /b
 
 if exist ReadMe.gfm copy Readme.gfm ..\..\ReadMe.md || exit /b
 if exist ReadMe.txt copy ReadMe.txt ..\..\ReadMe.txt || exit /b

Source/HBIOS/ppide.asm

@@ -1507,6 +1507,13 @@ PPIDE_PROBE:
 ; WAIT FOR THE DEVICE TO BE READY.  THIS WAIT IS MANDATORY BECAUSE
 ; SOME (IF NOT ALL) DEVICES WILL NOT PERSIST REGISTER VALUES UNTIL
 ; THE DRIVE IS READY.
+;
+	; FIRST, WRITE A $7F VALUE TO THE PPIDE STATUS REGISTER.  IF
+	; AN IDE DEVICE EXISTS, THIS WILL DO NO HARM.  IF NOT, THIS
+	; WILL HELP AVOID A FALSE POSITIVE (STALL).
+	LD	A,$7F
+	CALL	PPIDE_OUT
+	.DB	PPIDE_REG_DATA
 ;
 	CALL	PPIDE_IN
 	.DB	PPIDE_REG_STAT

Source/ver.inc

@@ -2,7 +2,7 @@
 #DEFINE	RMN	5
 #DEFINE	RUP	0
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.5.0-dev.61"
+#DEFINE BIOSVER	"3.5.0-dev.62"
 #define rmj	RMJ
 #define rmn	RMN
 #define rup	RUP

Source/ver.lib

@@ -3,5 +3,5 @@ rmn	equ	5
 rup	equ	0
 rtp	equ	0
 biosver	macro
-	db	"3.5.0-dev.61"
+	db	"3.5.0-dev.62"
 	endm