Lpc2000

I checked and the Device ID for the lpc213x and lpc214x are the same.

lpc2148: 196389 
lpc2138: 196389

How can I tell the parts from each other by using the isp commands.

Better yet, how does Philips tell the parts from their LPC2000 flash
utility as it can tell a 2138 from a 2148, even though the IDs are the
same.

The datasheet I have for the 2101-2103 only has the device ID for the
2103. Are the device ID for 2101/2 published anywhere?

Ed