Latest revision as of 02:58, 12 May 2017

Boards holding the joypad connectors, lid and power switch, and configuration jumpers in top-loading CD systems.

NEO-CDD3-1

NEO-CDD3-1 schematic

The power switch simply connects the yellow "LAND1" wire to ground.

Two NEO-BUF chips are use to switch the 68k data bus appropriately.

All inputs go through CRE401 RC networks.

Pin 38 of GA1 (tied to VCC) tells the system ROM that the system is a top-loader in REG_CDCONFIG.

No other versions of this board exist ?

@@ Line 1: / Line 1: @@
-Joypad and configuration boards in CD2 systems.
+Boards holding the [[Pinouts#Joypad_ports|joypad connectors]], lid and power switch, and configuration jumpers in top-loading [[CD systems]].
-= NEO-CDD3-1 =
+=NEO-CDD3-1=
 [[File:Neo-cdd3-1.png|300px|thumb|NEO-CDD3-1 schematic]]
-[[File:Neocdd31.jpg]]
+The power switch simply connects the yellow "LAND1" wire to ground.
-[[File:Neocdd31b.jpg]]
+Two {{Chipname|NEO-BUF}} chips are use to switch the 68k data bus appropriately.
 All inputs go through [[CRE401]] RC networks.
-Bit 5 of nationality byte (pin 38 of GA1, tied to VCC) is checked by the CDM3-2 BIOS, what happens if it's put to ground ?
+Pin 38 of GA1 (tied to VCC) tells the [[system ROM]] that the system is a top-loader in {{Reg|REG_CDCONFIG}}.
+No other versions of this board exist ?
+[[File:Neocdd31.jpg]]
-No other versions of this board ?
+[[File:Neocdd31b.jpg]]
 [[Category:CD systems]]
 [[Category:Chips]]