ACMULT = Acceleration cold multiplication factor (percent/100)
adsel = ADC Selector Variable
aircor = Air density correction is computed from MAT
asecount = Counter value for after-start enrichment counter - every ignition
AWC = After-start number of cycles
AWEV = After-start Warmup Percent enrichment add-on value
baro = The barometric pressure as measured by MegaSquirt
barocor = Barometer Lookup Correction - percent, based on the initial MAP sensor reading
batt = Battery Voltage ADC Raw Reading - counts
BATTFAC = Battery Gamma Factor
clt = Coolant Temperature ADC Raw Reading - counts (0 - 255)
coolant = Coolant temperature in Degrees F plus 40 (allows -40 degress to fit in integer)
CWH = Crank Enrichment at 170 F
CWU = Crank Enrichment at -40 F
ddra = Port A Data Direction Register
ego = Exhaust Gas Oxygen ADC Raw Reading - counts
egocorr = This is the correction factor computed from O2 sensor readings
egocount = Counter value for EGO step - incremented every ignition pulse
egotemp = Coolant Temperature where EGO is active
egocountcmp = Counter value where EGO step is to occur
egodelta = EGO Percent step size for rich/lean
egolimit = Upper/Lower EGO rail limit (egocorr is inside 100 +/- Limit)
engine = Variable bit-field to hold engine current status
FASTIDLE = Fast Idle Temperature
gammae = Total Gamma Enrichments - percent
InjOpen = Injector Open Time
InjOCFuel = PW-correlated amount of fuel injected during injector open
INJPWM = Injector PWM duty cycle at current limit
INJPWMT = Injector PWM millisec time at which to activate
kpa = MAP value in units of KPa
KPARANGEVE = VE Table MAP Pressure Bins for 2_D interp
last_tps = TPS reading updated every 0.1 seconds
lmap = Manifold Absolute Pressure ADC last Reading
lmat = Manifold Air Temp ADC last Reading
lclt = Coolant Temperature ADC last Reading
ltps = Throttle Position Sensor ADC last Reading
lbatt = Battery Voltage ADC last Reading
lego = Last EGO ADC reading
map = Manifold Absolute Pressure ADC Raw Reading - KPa (0 - 255)
mat = Manifold Air Temp ADC Raw Reading - counts (0 - 255)
mms = 0.0001 second update variable
ms = 0.001 second increment
porta = Port A Data Register
portb = Port B Data Register
portc = Port C Data Register
PRIMEP = Priming pulses (0.1 millisec units)
pulseigncount = Ignition pulse counter
pw = The injector pulse width being used by MS to squirt fuel into your motor
pwcalc = Computed pulse width - move into variable PW at pulse time
pw = Injector squirt time in 1/10 milliseconds (0 to 25.5 millisec) - applied
pw2= The other PW comparison (injector #2)
pwrun1 = Pulsewidth timing variable 1 - from 0 to 25.5ms
pwrun2 = Pulsewidth timing variable 2 - from 0 to 25.5ms
REQ_FUEL = Fuel Constant
RPMOXLIMIT = Minimum RPM where O2 Closed Loop is Active
rpm = Computed engine RPM - rpm/100
rpmch = Counter for high part of RPM
rpmcl = Counter for low part of RPM
rpmpl = Low part of RPM Period
rpmk = Constant for RPM = 12,000/ncyl - downloaded constant
rpmph = High part of RPM Period
rpmphl = last rpmph value (for odd-fire)
rpmpll = last rpmpl value (for odd-fire)
RPMRANGEVE = VE table RPM Bins for 2-D interpolation
rxoffset = offset placeholder when receiving VE/constants vis. SCI
secl = Time in seconds since MegaSquirt® last booted. Low seconds - from 0 to 255, then rollover.
sech = High seconds - rollover at 65536 secs (1110.933 minutes, 18.51 hours)
squirt = Event variable bit field for Injector Firing
tenth = 1/10th second
tmp1,...,tmp19 = Temporary storage.
tps = Throttle Position Sensor ADC Raw Reading - counts, represents 0 - 5 volts
tpsaccel = The acceleration enrichment
tpsaclk = TPS enrichment timer clock in 0.1 second resolution
TPSAQ = TPS acceleration amount (fn TPSDOT) in 0.1 ms units
tpsacold = Cold acceleration amount (at -40 degrees) in 0.1 ms units
TPSASYNC = TPS Acceleration clock value
TPSDQ = Deacceleration fuel cut
tpsfuelcut = TPS Fuel Cut (percent)
tpsthresh = Accel TPS DOT threshold
txcnt = SCI transmitter count (incremented)
txgoal = SCI number of bytes to transmit
txmode = Transmit mode flag
T1SCX_NO_PWM = No PWM
VE = 64 bytes for VE Table
vecurr = The current computed VE value determined by look up in the VETABLE using RPM and MAP
VOLTOXTARGET = O2 sensor flip target value
warmcor = The warmup correction factor applied due to start-up and coolant temperature status
WWU = Warmup bins (fn temp)
Quelle: MegaManual unter http://www.megamanual.com/v22manual/mapp.htm#ass