| Location | Bytes | Description | Notes |
| 00bb | 1 | raw MAP | set at 0844 |
| 00bf | 1 | adjusted MAP | more info... |
| 00C3 | 1 | Current RPM | also copied to 236h (look at 0816h) |
| 00C4 | 2 | Current RPM |
| 00CC | 1 | VSS Sensor | km/h |
| 00D1 | 1 | Current TPS | Throttle Position (see Tps Sensor) |
| 00D4 | 1 | TP Sensor |
| 00D5 | 1 | TPS Delta |
| 00D7 | 1 | Input into ADCR5 | not connected to a sensor on USDM P72 |
| 00D8 | 1 | IAT Sensor |
| 00D9 | 1 | ECT Sensor | |
| 00DA | 1 | O2 Sensor |
| 011a | 1 | CEL byte 1 |
| 011b | 1 | CEL byte 2 |
| 011c | 1 | CEL byte 3 |
| 011d | 1 | CEL byte 4 |
| 011E.3 | 1b | Auto/Manual config bit |
| 0127.1 | 1b | VTEC bit |
| 0131.0 | 1b | set if speed > 15 kph, cleared if speed < 10 kph | used to determine if VTEC should be on |
| 0131.1 | 1b | set when RPM is above VTEC switchover RPM | has hysteresis, related to VTEC logic |
| 0131.2 | 1b | set when RPM is above some level | has hysteresis, related to VTEC logic |
| 0131.6 | 1b | similar to 0131.2, but at a different level | not related to VTEC logic |
| 0131.7 | 1b | similar to 0131.6, but looks at MAP, not RPM | not related to VTEC logic |
| 0192 | | Rev cut limit |
| 0194 | | Rev resume limit |
| 01D2 | 1 | Column of Fuel/Ignition Map |
| 01D8 | 1 | Low Cam Row |
| 01D9 | 1 | High Cam Row |
| 0210.3 | 1b | Power Steering Pressure(PSP) switch input | If pin B8 (PSP) is grounded, 0x0210.3 will read 0 else it will read 1 |
| 0211.2 | 1b | AC switch | more info... |
| 0212.2 | 1b | Indicates MAP problem |
| 0212.4 | 1b | Indicates other MAP problem |
| 0212.6 | 1b | Indicates TPS problem |
| 0216.4 | 1b | Vtec Enable Flag |
| 0216.6 | 1b | Holds 02 Sensor Heater Enable Flag |
| 0219.3 | 1b | ????????? |
| 0227.4 | 1b | PA Sensor Enable Flag |
| 0227.6 | 1b | Knock Sensor Enable Flag |
| 022d.1 | 1b | VTEC VSS Check Enable Flag |
| 0236 | 1 | Current RPM in 8bit form (IAB Control @ 4393h routine) |
| 0244 | 1 | Knock Retard |
| 0246 | 1 | Ignition Advance |
| 0257 | 1 | controls ADC MUX Channel | 0 thru 7 |
| 025A | 2 | Current target idle RPM | function of ECT and tbl_5ba7 |
| 0356.1 | 1b | Serial comm mode | 1 for 9470 UART mode, 0 for 62500 9-bit mode |
| 03A0 | 2 | Injector Duration |
| 03CD | 1 | BARO Sensor |
| 03D2 | 1 | ELD? | (ADC input 1) |
| 0f00 | 1 | 82C55 Port A | inputs |
| 1f00 | 1 | 82C55 Port B | outputs |
| 2f00 | 1 | 82C55 Port C | outputs |
| 3f00 | 1 | 82C55 Command Register |
| 4700 | 1 | memory-mapped digital inputs | bit values modified and copied to 0119 and 0211, includes feedback from A/C switch, VTEC solenoids and others |
| P0.0 | 1b | A/C Clutch Output |
| P0.1 | 1b | Purge Canister Output |
| P0.5 | 1b | IAB Output | previously thought to be P4.3 |
| P1.0 | 1b | Left VTEC Transistor Output (IC14) |
| P1.1 | 1b | Right VTEC Transistor Output (IC13) |
*Some of these addresses were determined by comparing dasms of 273 vs. 203 and correlating known 203 addresses with the ones found in the 273.
| Location | Bytes | Description | Notes |
| 0630 | 3 | Injector test bypass #1 | Disable J label_063D(checked)03 3D 06 |
| 0B85 | 2 | Low Speed Ignition Map Config, Column Size | more info... |
| 0B87 | 2 | Low Speed Ignition Map Config, Row Size | more info... |
| 0B95 | 3 | Low Speed Ignition Map at this jump | more info... |
| 0BA1 | 2 | High Speed Ignition Map Config, Row Size | more info... |
| 0BA9 | 2 | High Speed Ignition Map at this jump | more info... |
| 11BA | 1 | VTEC On/Off Logic |
| 120E | 1 | VTEC Coolant Temp Check | (enable=44/disable=FF) |
| 1520 | 3 | Injector test bypass #2 | Disable J label_153A(ckecked)03 3A 15 |
| 2315 | 3 | O2 Heater Jump Routine | Change to "03 50 23" to disable O2 heater |
| 2D43 | 2 | Rolling Target Idle | RPM = 1875000/(word at 0x2D43) |
| 2D58 | 2 | Cold Target Idle | RPM = 1875000/(word at 0x2D58) |
| 2D81 | 2 | Warm Target Idle | RPM = 1875000/(word at 0x2D81) |
| 3BE1 | 3 | VTP Sensor Disable | Change to "03 FF 3B" to disable VTP sensor check (tested!) |
| 43A2 | 1 | IAB on | IAB open 8bit RPM (byte at 0x43A2) |
| 439D | 1 | IAB off | IAB close 8bit RPM (byte at 0x439D) |
| 5466 | 1 | Vtec Enable | (enable=FF/disable=00)(Needs Testing?) |
| 5467 | 1 | Knock Sensor | (enable=FF/disable=00) |
| 5468 | 1 | O2 Heater | (enable=FF/disable=00)(Needs Testing?) |
| 5469 | 1 | PA Sensor | (enable=FF/disable=00) |
| 546D | 1 | maybe injector test? |
| 547D | 1 | VTEC VSS Check | (enable=00/disable=FF) More info: Disable Vtec VSSCheck P72 |
| 547E | 1 | Debug Mode | (0xFF enables, 0x00 disables) More info: P72 Debug Mode |
| 5488 | 1 | Serial Mode | (FFh Enables UART Norm 9470bps) |
| 5489 | 1 | Iab control | (0xFF enables, 0x00 disables) |
| 58DA | 1 | Rev Resume #1 | RPM = 1875000/(byte at this address) |
| 58E0 | 1 | Rev Cut #1 |
| 58E6 | 1 | Rev Resume #2 |
| 58EC | 1 | Rev Cut #2 | i think the following 4 points are wrong |
| 595A | 2 | Rev Limit #1 | more info... |
| 5960 | 2 | Rev Limit #2 |
| 5966 | 2 | Rev Limit #3 |
| 596C | 2 | Rev Limit #4 |
| 59A0 | | Vtec | auto (?) |
| 59A2 | | Vtec | manual (?) |
| 5BA7 | | Idle | Lookup table for 16-bit target idle RPM as a function of ECT |
| 6059 | | Serial Comm | Lookup table for RAM addresses that can be accessed using 9470 UART mode |
| 7C9A | | Low Fuel (10x20) | more info... |
| 7D6C | | High Fuel (10x15) |
| 7E0C | | Low Timing (10x20) |
| 7ED4 | | High Timing (10X15) |
| 7C4A | | MAP sensor scalers | for fuel |
| 7C54 | | MAP sensor scalers | for ignition |
| 7C5E | | MAP sensor scalers | for lambda table |
| 7C68 | | Rev scalers | low cam fuel/ignition |
| 7C7C | | Rev scalers | high cam fuel/ignition |
| 7C8B | | Rev scalers | lambda table |
| 7C9A | | Fuel map | low cam |
| 7D6C | | Fuel map | high cam |
| 7E0C | | Ignition map | low cam |
| 7ED4 | | Ignition map | high cam |
| 7F6A | | Lambda map |