Connectors: Difference between revisions

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(Created page with "== SNES Controller Ports == NerdConsole has 2 SNES-style joystick ports built into the front of the system for players 1 and 2. These are always available. All controller connections are SNES controller compatible and use this same arrangement of pins. {| class="wikitable" | style="text-align:center" | '''Pin 1'''<br />Ground | style="text-align:center" | '''Pin 2'''<br />NC | style="text-align:center" | '''Pin 3'''<br />NC ! | style="text-align:center" | '''Pin 4''...")
 
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= Joysticks =
== SNES Controller Ports ==
== SNES Controller Ports ==
NerdConsole has 2 SNES-style joystick ports built into the front of the system for players 1 and 2.  These are always available.  All controller connections are SNES controller compatible and use this same arrangement of pins.
NerdConsole has 2 SNES-style joystick ports built into the front of the system for players 1 and 2.  These are always available.  All controller connections are SNES controller compatible and use this same arrangement of pins.
Line 24: Line 25:
| style="text-align:center" | '''Pin 6'''<br />VCC  
| style="text-align:center" | '''Pin 6'''<br />VCC  
|}
|}


== Extra Controller 4-Pin Port ==
== Extra Controller 4-Pin Port ==
Line 35: Line 35:
| style="text-align:center" | '''Pin 4'''<br />Data8
| style="text-align:center" | '''Pin 4'''<br />Data8
|}
|}
= Cartridge =
The 44-pin cartridge connector provides the means to access the ROM chip (or chips) that contain the software to execute.  The pin order may seem scrambled up, but it is laid out in a way that closely aligns with the pin order of most ROM chips.
{| class="wikitable"
! colspan="2" | Top / Front / Label Side
! colspan="2" | Bottom / Back Side
|-
| style="text-align:right" width="100" | A12
! style="text-align:left" width="30" | 1
! style="text-align:right" width="30" | 44
| style="text-align:left" width="100" | Ground
|-
| style="text-align:right" | A13
! style="text-align:left" | 2
! style="text-align:right" | 43
| style="text-align:left" | Clock
|-
| style="text-align:right" | A7
! style="text-align:left" | 3
! style="text-align:right" | 42
| style="text-align:left" | ~Read / Write
|-
| style="text-align:right" | A8
! style="text-align:left" | 4
! style="text-align:right" | 41
| style="text-align:left" | ~Enable
|-
| style="text-align:right" | A6
! style="text-align:left" | 5
! style="text-align:right" | 40
| style="text-align:left" | VCC (+5V DC)
|-
| style="text-align:right" | A9
! style="text-align:left" | 6
! style="text-align:right" | 39
| style="text-align:left" | RRS
|-
| style="text-align:right" | A5
! style="text-align:left" | 7
! style="text-align:right" | 38
| style="text-align:left" | HRS7
|-
| style="text-align:right" | A11
! style="text-align:left" | 8
! style="text-align:right" | 37
| style="text-align:left" | HRS6
|-
| style="text-align:right" | A4
! style="text-align:left" | 9
! style="text-align:right" | 36
| style="text-align:left" | HRS5
|-
| style="text-align:right" | A3
! style="text-align:left" | 10
! style="text-align:right" | 35
| style="text-align:left" | HRS4
|-
| style="text-align:right" | A10
! style="text-align:left" | 11
! style="text-align:right" | 34
| style="text-align:left" | HRS3
|-
| style="text-align:right" | A2
! style="text-align:left" | 12
! style="text-align:right" | 33
| style="text-align:left" | HRS2
|-
| style="text-align:right" | A1
! style="text-align:left" | 13
! style="text-align:right" | 32
| style="text-align:left" | HRS1
|-
| style="text-align:right" | D7
! style="text-align:left" | 14
! style="text-align:right" | 31
| style="text-align:left" | HRS0
|-
| style="text-align:right" | A0
! style="text-align:left" | 15
! style="text-align:right" | 30
| style="text-align:left" | LRS7
|-
| style="text-align:right" | D6
! style="text-align:left" | 16
! style="text-align:right" | 29
| style="text-align:left" | LRS6
|-
| style="text-align:right" | D0
! style="text-align:left" | 17
! style="text-align:right" | 28
| style="text-align:left" | LRS5
|-
| style="text-align:right" | D5
! style="text-align:left" | 18
! style="text-align:right" | 27
| style="text-align:left" | LRS4
|-
| style="text-align:right" | D1
! style="text-align:left" | 19
! style="text-align:right" | 26
| style="text-align:left" | LRS3
|-
| style="text-align:right" | D4
! style="text-align:left" | 20
! style="text-align:right" | 25
| style="text-align:left" | LRS2
|-
| style="text-align:right" | D2
! style="text-align:left" | 21
! style="text-align:right" | 24
| style="text-align:left" | LRS1
|-
| style="text-align:right" | D3
! style="text-align:left" | 22
! style="text-align:right" | 23
| style="text-align:left" | LRS0
|}
''' Key '''
* ~ = Active Low Signal
* A = Address Pins (0-13)
* D = Data Pins (0-7)
* LRS = Low ROM Select (0-7)
* HRS = High ROM Select (0-7)
* RRS = ROM Region Select
** 0 = Low ROM ($8000 to $BFFF)
** 1 = High ROM ($C000 to $FFFF)
= Video Board Port =
The connection between the NerdConsole mainboard and the Raspberry Pi that acts as the PPU is made through a 28-Channel logic level conversion board.  This is required because NerdConsole operates at 5V and the GPIO system on a Raspberry Pi operates at 3.3V.  According to the Raspberry Pi documentation, you absolutely ''CANNOT'' use 5V logic levels with GPIO without causing permanent damage.
{| class="wikitable"
| style="text-align:right" width="100" | ---
! style="text-align:left" width="30" | 1
! style="text-align:right" width="30" | 2
| style="text-align:left" width="100" | ---
|-
| style="text-align:right" | A0
! style="text-align:left" | 3
! style="text-align:right" | 4
| style="text-align:left" | ---
|-
| style="text-align:right" | A1
! style="text-align:left" | 5
! style="text-align:right" | 6
| style="text-align:left" | ---
|-
| style="text-align:right" | A2
! style="text-align:left" | 7
! style="text-align:right" | 8
| style="text-align:left" | ~Vsync
|-
| style="text-align:right" | ---
! style="text-align:left" | 9
! style="text-align:right" | 10
| style="text-align:left" | ~Enable
|-
| style="text-align:right" | A3
! style="text-align:left" | 11
! style="text-align:right" | 12
| style="text-align:left" | Read / ~Write
|-
| style="text-align:right" | A4
! style="text-align:left" | 13
! style="text-align:right" | 14
| style="text-align:left" | ---
|-
| style="text-align:right" | A5
! style="text-align:left" | 15
! style="text-align:right" | 16
| style="text-align:left" | Pi Shutdown
|-
| style="text-align:right" | ---
! style="text-align:left" | 17
! style="text-align:right" | 18
| style="text-align:left" | Front Power
|-
| style="text-align:right" | A6
! style="text-align:left" | 19
! style="text-align:right" | 20
| style="text-align:left" | ---
|-
| style="text-align:right" | A7
! style="text-align:left" | 21
! style="text-align:right" | 22
| style="text-align:left" | D0
|-
| style="text-align:right" | A8
! style="text-align:left" | 23
! style="text-align:right" | 24
| style="text-align:left" | D1
|-
| style="text-align:right" | ---
! style="text-align:left" | 25
! style="text-align:right" | 26
| style="text-align:left" | D2
|-
| style="text-align:right" | A9
! style="text-align:left" | 27
! style="text-align:right" | 28
| style="text-align:left" | D3
|-
| style="text-align:right" | A10
! style="text-align:left" | 29
! style="text-align:right" | 30
| style="text-align:left" | ---
|-
| style="text-align:right" | A11
! style="text-align:left" | 31
! style="text-align:right" | 32
| style="text-align:left" | D4
|-
| style="text-align:right" | A12
! style="text-align:left" | 33
! style="text-align:right" | 34
| style="text-align:left" | ---
|-
| style="text-align:right" | A13
! style="text-align:left" | 35
! style="text-align:right" | 36
| style="text-align:left" | D5
|-
| style="text-align:right" | A14
! style="text-align:left" | 37
! style="text-align:right" | 38
| style="text-align:left" | D6
|-
| style="text-align:right" | ---
! style="text-align:left" | 39
! style="text-align:right" | 40
| style="text-align:left" | D7
|}
''' Key '''
* ~ = Active Low Signal
* --- = Not Connected
* A = Address Pins (0-14)
* D = Data Pins (0-7)

Revision as of 19:43, 17 January 2024

Joysticks

SNES Controller Ports

NerdConsole has 2 SNES-style joystick ports built into the front of the system for players 1 and 2. These are always available. All controller connections are SNES controller compatible and use this same arrangement of pins.

Pin 1
Ground 		Pin 2
NC 		Pin 3
NC 		Pin 4
Data 		Pin 5
Latch 		Pin 6
Clock 		Pin 7
VCC

Extra Controller 6-Pin Port

Built onto the mainboard is a 6-pin connector that provides the power and signals for controllers 3 and 4. Data3 and Data4 lines are specifically for those controllers.

Pin 1
Ground 		Pin 2
Data3 		Pin 3
Data4 		Pin 4
Latch 		Pin 5
Clock 		Pin 6
VCC

Extra Controller 4-Pin Port

Built onto the mainboard is a 4-pin connector that provides the data signals for controllers 5, 6, 7 and 8. Data5, Data6, Data7, and Data8 lines are specifically for those controllers. This connection is used in conjunction with the 6-Pin port connections.

Pin 1
Data5 		Pin 2
Data6 		Pin 3
Data7 		Pin 4
Data8

Cartridge

The 44-pin cartridge connector provides the means to access the ROM chip (or chips) that contain the software to execute. The pin order may seem scrambled up, but it is laid out in a way that closely aligns with the pin order of most ROM chips.

Top / Front / Label Side Bottom / Back Side
A12 1 44 Ground
A13 2 43 Clock
A7 3 42 ~Read / Write
A8 4 41 ~Enable
A6 5 40 VCC (+5V DC)
A9 6 39 RRS
A5 7 38 HRS7
A11 8 37 HRS6
A4 9 36 HRS5
A3 10 35 HRS4
A10 11 34 HRS3
A2 12 33 HRS2
A1 13 32 HRS1
D7 14 31 HRS0
A0 15 30 LRS7
D6 16 29 LRS6
D0 17 28 LRS5
D5 18 27 LRS4
D1 19 26 LRS3
D4 20 25 LRS2
D2 21 24 LRS1
D3 22 23 LRS0

Key

  • ~ = Active Low Signal
  • A = Address Pins (0-13)
  • D = Data Pins (0-7)
  • LRS = Low ROM Select (0-7)
  • HRS = High ROM Select (0-7)
  • RRS = ROM Region Select
    • 0 = Low ROM ($8000 to $BFFF)
    • 1 = High ROM ($C000 to $FFFF)

Video Board Port

The connection between the NerdConsole mainboard and the Raspberry Pi that acts as the PPU is made through a 28-Channel logic level conversion board. This is required because NerdConsole operates at 5V and the GPIO system on a Raspberry Pi operates at 3.3V. According to the Raspberry Pi documentation, you absolutely CANNOT use 5V logic levels with GPIO without causing permanent damage.

--- 1 2 ---
A0 3 4 ---
A1 5 6 ---
A2 7 8 ~Vsync
--- 9 10 ~Enable
A3 11 12 Read / ~Write
A4 13 14 ---
A5 15 16 Pi Shutdown
--- 17 18 Front Power
A6 19 20 ---
A7 21 22 D0
A8 23 24 D1
--- 25 26 D2
A9 27 28 D3
A10 29 30 ---
A11 31 32 D4
A12 33 34 ---
A13 35 36 D5
A14 37 38 D6
--- 39 40 D7

Key

  • ~ = Active Low Signal
  • --- = Not Connected
  • A = Address Pins (0-14)
  • D = Data Pins (0-7)
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