Created Switcher Project

Readme.md

@@ -41,11 +41,12 @@ It will create a CD-ROM as D: and you can run it from d:\entry.exe, by default i
 9. VMX is there
 10. Spawn a Virtual Machine in Unrestricted guest mode. Paged Protected Mode guest also there.
 11. Entry /r which installs as TSR the DMMI services
-12. DMMI startup example taken from https://board.flatassembler.net/topic.php?t=7122
+12. DPMI startup example taken from https://board.flatassembler.net/topic.php?t=7122
 13. DMMIC app runs which demonstrates DMMI, launching real mode, protected mode, long mode and virtualized protected mode threads
 14. DOS32A loads a linear executable created with FASM
 15. VDEBUG Virtualized Debugger (Not fully implemented yet)
 15. MDEBUG Multicore Debugger (Not fully implemented yet)
+16. SWITCHER multitasker (Not fully implemented yet)
 
 ## DMMI
 I've called it DOS Multicore Mode Interface. It is a driver which helps you develop 32 and 64 bit multicore applications for DOS, using int 0xF0. 
@@ -111,6 +112,10 @@ Compile it with config.asm MDEBUG = 1. This app should perform the following:
 
 This project is not yet created, but I hope that it will be here soon!
 
+## Switcher
+Switcher is a DMMI client that is able to do multitasking in DOS using multiple cores and virtualization.
+More to follow soon!
+
 
 
 

asm.vcxproj

@@ -203,6 +203,7 @@
     <None Include="startvbox.bat" />
     <None Include="startvmware.bat" />
     <None Include="struct.asm" />
+    <None Include="swmain.asm" />
     <None Include="thread16.asm" />
     <None Include="thread32.asm" />
     <None Include="thread64.asm" />

asm.vcxproj.filters

@@ -32,6 +32,9 @@
     <Filter Include="Debuggee">
       <UniqueIdentifier>{189d96b4-2842-4505-805a-815b3b66bbd4}</UniqueIdentifier>
     </Filter>
+    <Filter Include="Switcher">
+      <UniqueIdentifier>{3d37bfd1-8ba1-4f5b-b5f5-5a30a1334465}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="entry.asm">
@@ -213,6 +216,9 @@
     <None Include="dpmic.asm">
       <Filter>DPMI Client</Filter>
     </None>
+    <None Include="swmain.asm">
+      <Filter>Switcher</Filter>
+    </None>
   </ItemGroup>
   <ItemGroup>
     <Text Include="dis\main.c">

build.bat

@@ -4,6 +4,7 @@ fasm dpmic.asm
 fasm dmmic.asm
 fasm vdebug.asm
 fasm mdebug.asm
+fasm swmain.asm switcher.exe
 fasm debuggee.asm
 fasm leheader.asm le.exe
 REM upx --best entry.exe
@@ -14,6 +15,7 @@ copy /y debuggee.exe .\CD\debuggee.exe
 copy /y entry.exe .\CD\entry.exe 
 copy /y dmmic.exe .\CD\dmmic.exe
 copy /y dpmic.exe .\CD\dpmic.exe
+copy /y switcher.exe .\CD\switcher.exe
 copy /y le.exe .\CD\le.exe
 copy /y runx.bat .\CD\runx.bat
 powershell -ExecutionPolicy RemoteSigned -File "iso.ps1"

bx_enh_dbg.ini

@@ -24,4 +24,4 @@ ListWidthPix[1] = 464
 ListWidthPix[2] = 396
 FontName = System
 FontSize = -16
-MainWindow = 151, 98, 1591, 865
+MainWindow = 303, 169, 1743, 936

runx.bat

@@ -15,6 +15,7 @@ rem cd ..
 
 vdebug debuggee.exe
 mdebug debuggee.exe
+switcher
 
 
 a:

swmain.asm

@@ -0,0 +1,44 @@
+FORMAT MZ
+HEAP 0
+
+macro linear reg,trg,seg = DATA16
+	{
+	mov reg,seg
+	shl reg,4
+	add reg,trg
+	}
+
+segment STACK16
+USE16 
+
+dw 128 dup(0)
+stre:
+
+segment DATA16
+USE16
+m1 db "Switcher, (C) Chourdakis Michael.",0x0D,0x0A,"$"
+
+segment CODE16
+USE16
+
+include "reqdmmi.asm"
+
+start16:
+	mov ax,STACK16
+	mov ss,ax
+	mov eax,stre
+	mov esp,eax
+	mov ax,DATA16
+	mov ds,ax
+	mov es,ax
+	mov ax,0x0900
+	mov dx,m1
+	int 0x21
+
+	mov ax,0x4C00
+	int 0x21
+
+SEGMENT ENDS 
+entry CODE16:start16
+
+

vdebug.asm

@@ -76,6 +76,12 @@ start16:
 	mov ax,0x0900
 	mov dx,m1
 	int 0x21
+
+if VDEBUG = 0
+	mov ax,0x4C00
+	int 0x21
+end if 
+
 	mov ah,0x62
 	int 0x21
 	mov [mypsp],bx