Updates after testing.

Author: Andy4495

README.md

@@ -70,6 +70,8 @@ Each chip should have a 0.1 uF decoupling capacitor connected between Vcc and GN
 
 When using a 74LVC245 or other transceiver, the library assumes that the A side of the 74LVC245 is connected to the EEPROM data lines, and the B side is connected to the microcontroller.
 
+In order to support both 28C256 and 28C16, the programming hardware needs to account for slightly different pinouts between the chips. In particular, the 28C256/X28256 has 28 pins and the 28C16 has 24. Pin 26 is an address pin on the 28C256/X28256, which corresponds to Vcc pin 24 on the 28C16. The programming hardware therefore has a jumper at pin 26/24 so that A13 can be selected when using a 28 pin device, and Vcc can be selected when using a 24 pin device. 
+
 In other words, connect as follows:
 ```
 EEPROM Pin  74LVC245 Pin  Chip Signal Name

src/ParallelEEPROM.cpp

@@ -182,6 +182,8 @@ void ParallelEEPROM::begin() {
 void ParallelEEPROM::write(uint16_t address, byte data) {
   int i;
 
+  _lastAddressWritten = address;
+  _lastByteWritten    = data;
   setAddressLines(address);
   setDataOutputMode();
   if (_LVC245_DIR != NO_PIN) digitalWrite(_LVC245_DIR, LOW);
@@ -202,8 +204,6 @@ void ParallelEEPROM::write(uint16_t address, byte data) {
   // No delay needed, data already read above
   if (_LVC245_OE != NO_PIN) digitalWrite(_LVC245_OE, HIGH);
   setDataInputMode();
-  _lastAddressWritten = address;
-  _lastByteWritten    = data;
 }
 
 // This method uses Data Polling to check if prevous write