diff -Nura uisp-20040311/src/DAPA.C uisp-marga/src/DAPA.C
--- uisp-20040311/src/DAPA.C	2004-02-07 15:54:06.000000000 -0300
+++ uisp-marga/src/DAPA.C	2004-09-28 17:31:43.000000000 -0300
@@ -219,8 +219,6 @@
 #define ABB_XTAL1   0x08
 
 /*
-   XXX not yet supported, just documented here...
-
    Atmel-ISP Download Cable (P/N ATDH1150VPC)
    (10-pin connector similar to Altera Byte Blaster, but no 3-state outputs)
    http://www.atmel.com/atmel/acrobat/isp_c_v5.pdf
@@ -380,6 +378,7 @@
 void
 TDAPA::ParportWriteCtrl()
 {
+  Info(5, "Control: %x \n", par_ctrl);
   if (ppdev_fd != -1)
     par_write_ctrl(ppdev_fd, &par_ctrl);
   else
@@ -389,6 +388,7 @@
 void
 TDAPA::ParportWriteData()
 {
+  Info(5, "Data: %x \n", par_data);
   if (ppdev_fd != -1)
     par_write_data(ppdev_fd, &par_data);
   else
@@ -402,6 +402,8 @@
     par_read_status(ppdev_fd, &par_status);
   else
     par_status = ioport_read(IOBASE+1);
+  
+  Info(5,"Status: %x \n", par_status);
 }
 
 void
@@ -428,6 +430,7 @@
 {
   if (reset_invert)
     b = !b;
+  Info(4, "Reseting: %d\n", b);
   switch (pa_type) {
   case PAT_DAPA:
     if (b) par_ctrl |= DAPA_RESET; else par_ctrl &= ~DAPA_RESET;
@@ -444,6 +447,11 @@
     ParportWriteData();
     break;
 
+  case PAT_ATDH:
+    if (b) par_ctrl |= ATDH_RESET; else par_ctrl &= ~ATDH_RESET;
+    ParportWriteCtrl();
+    break;
+
   case PAT_PARAVRISP:
     if (b) par_data |= AISP_RESET; else par_data &= ~AISP_RESET;
     ParportWriteData();
@@ -520,6 +528,11 @@
     ParportWriteData();
     break;
 
+  case PAT_ATDH:
+    if (b) par_ctrl |= ATDH_SCK; else par_ctrl &= ~ATDH_SCK;
+    ParportWriteCtrl();
+    break;
+
   case PAT_PARAVRISP:
     if (b) par_data |= AISP_SCK; else par_data &= ~AISP_SCK;
     ParportWriteData();
@@ -580,6 +593,7 @@
   switch (pa_type) {
   case PAT_DAPA:
   case PAT_FBPRG:
+  case PAT_ATDH:
   case PAT_DT006:
   case PAT_ETT:
   case PAT_MAXI:
@@ -697,6 +711,7 @@
 
   case PAT_DAPA:
   case PAT_ABB:
+  case PAT_ATDH:
   case PAT_PARAVRISP:
   case PAT_BSD:
   case PAT_FBPRG:
@@ -706,7 +721,7 @@
   case PAT_XIL:
   case PAT_DASA:
   case PAT_DASA2:
-    /* no separate enable for SCK nad MOSI */
+    /* no separate enable for SCK and MOSI */
     break;
   }
 }
@@ -752,6 +767,11 @@
     ParportWriteData();
     break;
 
+  case PAT_ATDH:
+    if (b) par_data |= ATDH_DOUT; else par_data &= ~ATDH_DOUT;
+    ParportWriteData();
+    break;
+
   case PAT_PARAVRISP:
     if (b) par_data |= AISP_DOUT; else par_data &= ~AISP_DOUT;
     ParportWriteData();
@@ -819,6 +839,7 @@
     b = (par_status & ETT_DIN);
     break;
   case PAT_STK200:
+  case PAT_ATDH:
   case PAT_PARAVRISP:
   case PAT_BSD:
   case PAT_FBPRG:
@@ -866,6 +887,11 @@
     par_data = 0xFF & ~ABB_SCK;
     break;
 
+  case PAT_ATDH:
+    par_ctrl = ATDH_RESET;
+    par_data = 0xFF;
+    break;
+
   case PAT_PARAVRISP:
     par_ctrl = 0;
     par_data = 0xFF & ~(AISP_ENA | AISP_SCK);
@@ -924,6 +950,7 @@
 {
   unsigned int mask, received=0;
 
+  Info(4, "Sending: %d \n", b);
   for (mask = 0x80; mask; mask >>= 1) {
      OutData(b & mask);
      SckDelay();
@@ -937,6 +964,7 @@
        received |= mask;
      OutSck(0);
   }
+  Info(4, "Received: %d \n", received);
   return received;
 }
 
@@ -988,6 +1016,8 @@
     pa_type = PAT_STK200;
   else if (val && strcmp(val, "abb") == 0)
     pa_type = PAT_ABB;
+  else if (val && strcmp(val, "atdh") == 0)
+    pa_type = PAT_ATDH;
   else if (val && strcmp(val, "paravrisp") == 0)
     pa_type = PAT_PARAVRISP;
   else if (val && strcmp(val, "bsd") == 0)
@@ -1120,6 +1150,11 @@
     at89 = 1;
   }
 
+  if (GetCmdParam("-d89S52",false)) {
+    reset_invert = 0;
+    at89 = 1;
+  }
+
   if ((val=GetCmdParam("-dinvert")))
     {
 #define MAXLINESIZE    256
diff -Nura uisp-20040311/src/DAPA.h uisp-marga/src/DAPA.h
--- uisp-20040311/src/DAPA.h	2004-02-07 15:54:06.000000000 -0300
+++ uisp-marga/src/DAPA.h	2004-09-28 17:32:01.000000000 -0300
@@ -43,9 +43,9 @@
 
 class TDAPA {
 public:
-  enum TPaType{	PAT_DAPA, PAT_STK200, PAT_ABB, PAT_PARAVRISP, PAT_BSD,
-		PAT_FBPRG, PAT_DT006, PAT_ETT, PAT_MAXI, PAT_XIL,
-		PAT_DASA, PAT_DASA2 };
+  enum TPaType{	PAT_DAPA, PAT_STK200, PAT_ABB, PAT_ATDH, PAT_PARAVRISP,
+          PAT_BSD, PAT_FBPRG, PAT_DT006, PAT_ETT, PAT_MAXI, PAT_XIL,
+          PAT_DASA, PAT_DASA2 };
 
 private:
   int mosi_invert;
diff -Nura uisp-20040311/src/Main.C uisp-marga/src/Main.C
--- uisp-20040311/src/Main.C	2004-02-07 15:54:06.000000000 -0300
+++ uisp-marga/src/Main.C	2004-09-28 17:34:16.000000000 -0300
@@ -92,6 +92,7 @@
 "         dapa      Direct AVR Parallel Access\n"
 "         stk200    Parallel Starter Kit STK200, STK300\n"
 "         abb       Altera ByteBlasterMV Parallel Port Download Cable\n"
+"         atdh      Atmel-ISP Download Cable \n"
 "         paravrisp [Unknown origin] Parallel port programmer\n"
 "         bsd       http://www.bsdhome.com/avrdude/ (parallel)\n"
 "         fbprg     http://ln.com.ua/~real/avreal/adapters.html (parallel)\n"
@@ -125,6 +126,7 @@
 "  -dinvert=... Invert specified lines\n"
 "               Use -v=3 option to see current settings.\n"
 "  -d89         Allow parallel programming of AT89S51 and AT89S52 devices.\n"
+"  -d89S52      Allow parallel programming of AT89S52 devices (non inverted reset).\n"
 #endif
 "\n"
 "Atmel Low Cost Programmer Serial Device Settings:\n"
diff -Nura uisp-20040311/src/stamp-h1 uisp-marga/src/stamp-h1
--- uisp-20040311/src/stamp-h1	1969-12-31 21:00:00.000000000 -0300
+++ uisp-marga/src/stamp-h1	2004-09-26 20:47:42.000000000 -0300
@@ -0,0 +1 @@
+timestamp for src/config.h