Integrating Slot-otter ISA emulation

.gitignore

@@ -1 +1,3 @@
-build
+build
+tools/sdcard.img
+tools/OTTERNAV.EXE

README.md

@@ -1,6 +1,7 @@
 # DOSBox-VirtIsa
 
-This fork focuses on building an emulation environment for a custom ISA card.
+This fork focuses on building an emulation environment for a 
+[custom ISA card](https://github.com/ifilot/slot-otter).
 
 ## Purpose of this fork
 

docs/dosbox.1

@@ -65,7 +65,7 @@ at the end of
 .RB "inside " dosbox )
 .TP
 .B \-userconf
-Load the configuration file located in ~/.dosbox. Can be combined with
+Load the configuration file located in ~/.dosbox-virtisa. Can be combined with
 .RB "the " \-conf " option." 
 .TP
 .BI \-scaler " scaler"
@@ -286,7 +286,7 @@ If no configfile is specified at the commandline, a file named
 loaded automatically. If a configfile is specified at the commandline
 that one will be used instead. If no configfile is specified or found
 in the current directory
-.RB " then dosbox will load one from " ~/.dosbox/ ". It will try to create "
+.RB " then dosbox will load one from " ~/.dosbox-virtisa/ ". It will try to create "
 one if there is none.
 .SH "SPECIAL KEYS"
 .TP 12m

src/dosbox.cpp

@@ -419,6 +419,9 @@ void DOSBOX_Init(void) {
 	Pstring = secprop->Add_path("captures",Property::Changeable::Always,"capture");
 	Pstring->Set_help("Directory where things like wave, midi, screenshot get captured.");
 
+	Pstring = secprop->Add_path("isa_sd_image", Property::Changeable::OnlyAtStart, "");
+	Pstring->Set_help("Path to SD-card image file used by the custom ISA interface on port 330h.");
+
 #if C_DEBUG	
 	LOG_StartUp();
 #endif