Small improvements

src/polio.s

@@ -163,7 +163,7 @@ int80h:
     jge 0f
     mov si, cx
     mov bp, sp
-    lea bp, [bp + 16]       # 10 for us, 6 for the interrupt
+    add bp, 16       # 10 for us, 6 for the interrupt
     call cs:[int80h_table+si]
     jmp 1f
 0:

src/polmon.cc

@@ -288,7 +288,8 @@ bool ParseCommand(const char* buf, uint16_t& cur_addr, uint16_t& cur_seg) {
             uint16_t args[8];  // ought to be enough for everybody
             uint8_t nargs = 0;
             ptr++;
-            int fun = ReadUint16(ptr);
+            int fun = ReadUint8(ptr) << 8;
+            fun += ReadUint8(ptr);
             for (; *ptr && nargs < 8;) {
                 if (*ptr == ' ') {
                     ptr++;