+// setBaseXMode() does the initialization to make the VGA ready to\r
+// accept any combination of configuration register settings. This\r
+// involves enabling writes to index 0 to 7 of the CRT controller (port\r
+// 0x3D4), by clearing the most significant bit (bit 7) of index 0x11.\r
+void\r
+modexsetBaseXMode(void)\r
+{\r
+ word temp;\r
+ /* TODO save current video mode and palette */\r
+ vgaSetMode(VGA_256_COLOR_MODE);\r
+\r
+ /* disable chain4 mode */\r
+ outpw(SC_INDEX, 0x0604);\r
+\r
+ /* synchronous reset while setting Misc Output */\r
+ outpw(SC_INDEX, 0x0100);\r
+\r
+ /* select 25 MHz dot clock & 60 Hz scanning rate */\r
+ outp(MISC_OUTPUT, 0xe3);\r
+\r
+ /* undo reset (restart sequencer) */\r
+ outpw(SC_INDEX, 0x0300);\r
+\r
+ /* reprogram the CRT controller */\r
+ outp(CRTC_INDEX, 0x11); /* VSync End reg contains register write prot */\r
+// temp = inp(CRTC_DATA) & 0x7F;\r
+// outp(CRTC_INDEX, 0x11);\r
+ outp(CRTC_DATA, 0x7f); /* get current write protect on varios regs */\r
+// outp(CRTC_DATA, temp); /* get current write protect on varios regs */\r
+}\r