:: relation of arduino - ramps pins (:P) (3 replies)

alo folks out there ... just diggin around
was trying to figure out the relation of pins between arduino n ramps, and yes there is this list in the wiki :

// For RAMPS 1.4
#define X_STEP_PIN 54
#define X_DIR_PIN 55
#define X_ENABLE_PIN 38
#define X_MIN_PIN 3
#define X_MAX_PIN 2

#define Y_STEP_PIN 60
#define Y_DIR_PIN 61
#define Y_ENABLE_PIN 56
#define Y_MIN_PIN 14
#define Y_MAX_PIN 15

#define Z_STEP_PIN 46
#define Z_DIR_PIN 48
#define Z_ENABLE_PIN 62
#define Z_MIN_PIN 18
#define Z_MAX_PIN 19

#define E_STEP_PIN 26
#define E_DIR_PIN 28
#define E_ENABLE_PIN 24

#define SDPOWER -1
#define SDSS 53
#define LED_PIN 13

#define FAN_PIN 9

#define PS_ON_PIN 12
#define KILL_PIN -1

#define HEATER_0_PIN 10
#define HEATER_1_PIN 8
#define TEMP_0_PIN 13 // ANALOG NUMBERING
#define TEMP_1_PIN 14 // ANALOG NUMBERING

taking note of Z - EN pin, labelled as 62, there is actually no physical pin 62 on the arduino PCB, it is actually connected to A8. so am i to assume this is a software mapping number? as is with all other numbering because it does not correspond to any relation to arduino pin at all?

does any1 know ?

cheers