{}2000,3FFF,0,30 Use the M command to change the data in RAM as you wish it to be. Now program the revised data into the 2764A: P2000,3FFF,0,6,7 PROGRAMMING ERRORS While programming an EPROM, PROMOS checks to see that the job is being done correctly. If an error is detected, programming is stopped and you are advised what happened by messages on the screen. For suggestions on determining the source of the trouble, see the section on troubleshooting. THE V COMMAND- Verify EPROM data. The V command compares the data on an EPROM with data In computer memory. It has two forms: the long form, with parameters exactly the same as in the R command; and the short form which is just V alone with no parameters at all. The short form uses the parameters from the most recent R or P command. The EPROM addresses of all discrepant locations, the checksum and the hashtotal are printed on the screen. Some examples: V2000,3FFF,0,6 Here, we compare data from 2000 through 3FFF with the data on a 2764A. P4000,BFFF,0,E6,6:V Here, we have programmed a 27256 with data from 4000 through BFFF and have followed with the short form of the V command. COPYING EPROMS The PROMENADE is a very efficient piece of production equipment. One can quite easily program 250 2764's in an hour. The usual procedure is to read an EPROM MASTER into RAM using the R command, then program the duplicates using the P command. It isn't necessary to type a new P command for each copy. Just move the cursor up to the P command line and press RETURN. Here's a simple example of a command that programs 2764A's, verifies the data, keeps track of the number of copies that have been made and prints it on the screen: -14-