diff --git a/board_enable.c b/board_enable.c
index 5e7c646..23b4720 100644
--- a/board_enable.c
+++ b/board_enable.c
@@ -352,7 +352,9 @@
 }
 
 /**
- * w83627: Enable MEMW# and set ROM size to max.
+ * Enable MEMW# and set ROM size to max.
+ * Supported chips:
+ * W83L517D, W83697HF/F/HG, W83697SF/UF/UG
  */
 static void w836xx_memw_enable(uint16_t port)
 {
@@ -1715,6 +1717,7 @@
 	{0x8086, 0x24D3, 0x1043, 0x80A6,  0x8086, 0x2578, 0x1043, 0x80F6, NULL,          NULL,         NULL,          "ASUS",        "P4C800-E Deluxe",       0,   OK, intel_ich_gpio21_raise},
 	{0x8086, 0x2570, 0x1043, 0x80F2,  0x105A, 0x3373, 0x1043, 0x80F5, NULL,          NULL,         NULL,          "ASUS",        "P4P800-E Deluxe",       0,   OK, intel_ich_gpio21_raise},
 	{0x8086, 0x2570, 0x1043, 0x80A5,  0x105A, 0x24D3, 0x1043, 0x80A6, NULL,          NULL,         NULL,          "ASUS",        "P4SD-LA",               0,   NT, intel_ich_gpio32_raise},
+	{0x1039, 0x0661, 0x1043, 0x8113,  0x1039, 0x5513, 0x1043, 0x8087, NULL,          NULL,         NULL,          "ASUS",        "P4S800-MX",             512, OK, w836xx_memw_enable_2e},
 	{0x10B9, 0x1541,      0,      0,  0x10B9, 0x1533,      0,      0, "^P5A$",       "asus",       "p5a",         "ASUS",        "P5A",                   0,   OK, board_asus_p5a},
 	{0x10DE, 0x0030, 0x1043, 0x818a,  0x8086, 0x100E, 0x1043, 0x80EE, NULL,          NULL,         NULL,          "ASUS",        "P5ND2-SLI Deluxe",      0,   OK, nvidia_mcp_gpio10_raise},
 	{0x8086, 0x24dd, 0x1043, 0x80a6,  0x8086, 0x2570, 0x1043, 0x8157, NULL,          NULL,         NULL,          "ASUS",        "P5PE-VM",               0,   OK, intel_ich_gpio21_raise},