diff --git a/namco/boards.md b/namco/boards.md
index 2ed7e0b..68b1009 100644
--- a/namco/boards.md
+++ b/namco/boards.md
@@ -94,9 +94,9 @@ JP/Asia/China:
 **GPU:** \[N2(WM3)(Asia/China)\] Nvidia GeForce 7600GS (AGP, 256MB) (China 7600GS has rubber material covering VRAM chips)  
 **GPU:** \[N2(WM3)(Japan)\] Nvidia GeForce 7800GS (AGP, 512MB?, red sticker on N2(WM3) type sticker, game: W3P)  
 **HDD:** Seagate ST380215A/ST380011A (80GB PATA) / WD WD800BB-55JKC0 (80GB PATA)  
-**IO:** Namco "V337 RC PCB" (expansion slot, internal sound connector to motherboard, 1x RCA white, 1x RCA red)  
-**IO:** RATOC PCI604 (PCI, 1x USB, 1x serial, 2x internal serial with ribbon cable to "V337 RS PCB", REX-PCI60 variant? https://www.ratocsystems.com/products/subpage/pci60.html)  
-**IO:** Namco "V337 RS PCB" (above motherboard shield, 8pin connector, internal 8pin connector with ribbon cable to RATOC PCI604)  
+**IO:** [Namco V337 RC PCB](io.md#v337-rc) (expansion slot, internal sound connector to motherboard)  
+**IO:** RATOC PCI604 (PCI, 1x USB, 1x RS232 DE-9 serial, 2x internal COM header with ribbon cable to V337 RS, REX-PCI60 variant? https://www.ratocsystems.com/products/subpage/pci60.html)  
+**IO:** [Namco V337 RS PCB](io.md#v337-rs) (above motherboard shield, internal 8pin connector with ribbon cable to RATOC PCI604)  
 
 Export:  
 **MBD:** ASUS M2N-MX  
@@ -116,11 +116,15 @@ Export:
 
 PC, x86-based. Variants: ES1, ES1(A2).
 
-**MBD:** Supermicro C2SBM-Q  
+**MBD:** Supermicro C2SBM-Q (ES1(A2): "FB16M-LS-C2D30-2G1")  
 **CPU:** Intel Core 2 Duo E8400  
-**RAM:** 2x ??? (DDR2, PC2-6400, 512MB)  
-**GPU:** \[ES1(A2)\] Nvidia GeForce 9600GT (PCIe, 512MB)  
+**RAM:** \[ES1?\] 2x ??? (DDR2, PC2-6400, 512MB)  
+**RAM:** \[ES1(A2)\] 1x SanMax SMD-2G88HP-8E (DDR2 DIMM, PC2-6400U-555, 2GB)
+**GPU:** \[ES1(A2)\] Nvidia GeForce 9600 GT (PCIe, 512MB, BIOS Version: 62.94.61.00.08)  
 **HDD:** Seagate ST3160318AS (SATA, 160GB, 7200RPM) / Hitachi HDS721016CLA382 (SATA, 160GB, 7200RPM)  
+**IO:** [Namco H039 ESIF PCB](io.md#h039-esif) (internal 4pin connector with cable to "JV IO (JAMMA)", internal 12pin connector to motherboard COM3 serial header and JF1 front panel header)  
+**IO:** "JV IO (JAMMA)" (expansion slot, 1x JVS USB, 1x internal connector with cable to H039)  
+**IO:** "SERIAL 3 (CARD IF)" (expansion slot, connector with cable to motherboard COM4 serial header, pinout up-down: GND CTS RTS TXD RXD)  
 
 ```
        - Nirin (NRN, https://www.bandainamco-am.co.uk/files/41)
@@ -131,7 +135,7 @@ PC, x86-based. Variants: ES1, ES1(A2).
          Midnight Tune 4 (WM4, http://collectedit.com/collectors/shou-time-213/arcade-pcbs-281/wangan-midnight-maximum-tune-4-japan-by-namco-20214 / https://www.arcade-projects.com/attachments/es1-jpg.2770/)
          Midnight Tune 5 (US)
     A2 - Gundam: Bonds of the Battlefield 3.0 (GKE?) (GSK? http://collectedit.com/collectors/shou-time-213/arcade-pcbs-281/mobile-suit-gundam-bonds-of-the-battlefield-japan-by-namco-19629)
-         Gundam: Bonds of the Battlefield 4.0 (GKE?) (GKN? https://page.auctions.yahoo.co.jp/jp/auction/g495616988)
+         Gundam: Bonds of the Battlefield 4.0 (GK4) (GKE?) (GKN? https://page.auctions.yahoo.co.jp/jp/auction/g495616988)
          Midnight Tune 4/5/5DX/5DX+ (Asia, WM4, https://www.facebook.com/weedxy2gab/photos/pcb.665771777362930/665771667362941/?type=3&theater)
          Maximum Heat 3D
 ```
diff --git a/namco/io.md b/namco/io.md
new file mode 100644
index 0000000..9894b1d
--- /dev/null
+++ b/namco/io.md
@@ -0,0 +1,41 @@
+# Interfaces
+
+## V337 RC
+
+Simple sound interface. Connects to internal sound header and exposes 1 red/white RCA pair.
+
+* Product: 2626960201 / (2626970201) / RC01933
+* Label: V337 RC PCB
+* Copyright: 2007 NAMCO BANDAI Games Inc.
+* Connectors:
+  - (external) 1x RCA white, 1x RCA red
+  - (internal) 1x 3pin audio connector (pinout up-down: GND LEFT RIGHT)
+
+## V337 RS
+
+Simple serial interface board.
+
+* Product: 2626960101 / (2626970101) / RS01369
+* Label: V337 RS PCB
+* Copyright: 2007 NAMCO BANDAI Games Inc.
+* Connectors:
+  - (internal) 1x 8pin (2x serial, pinout up-down: J2-GND J2-TXD J2-RXD J3-RXD J3-TXD J3-GND J3-CTS J3-RTS)
+  - (external) 1x 8pin (2x serial, pinout left-right: TXD1 RXD1 GND1 TXD2 RXD2 RTS CTS GND2)
+* Ribbon cable product: (2626970301) / RX01187
+
+## H039 ESIF
+
+External serial interface. Connects to motherboard serial, and exposes JVS and serial. Likely turns on/resets the motherboard too.
+
+* Product: 8694960101 / (8694970101) / 10L00373
+* Label: H039 ESIF PCB
+* Chips:
+  - Hitachi HD64F3672 (QFP48, H8 MCU)
+  - "E 14.7456C" "2PH K487H" (14.7456 MHz crystal)
+  - Sipex SP485EC (SOIC8, RS-485 transceiver)
+  - Maxlinear SP3222EUCY (SSOP16, RS-232 transceiver)
+* Connectors:
+  - (external) 1x 4pin
+  - (internal) 1x 12pin (to motherboard front panel and motherboard serial header, pinout up-down: JF1-RST-L JF1-RST-R JF1-PWRON-L JF1-PWRON-R JF1-HDDLED-L JF1-HDDLED-R JF1-PWRLED-L JF1-PWRLED-R COM-RTS COM-CTS COM-RXD COM-TXD
+  - (internal) 1x 4pin (to power supply 12V and 5V, pinout left-right: GND GND NC GND 12V 5V)
+  - (internal) 1x 4pin (to JVS expansion card, pinout left-right: V+ D+ D- V-)