Clarify how to load ROMs in README files

samples/README

@@ -11,7 +11,6 @@ Sample Programs
   When loaded at address $0300, this program will echo back to the console
   anything typed.
 
-
 Both hello.prg and echo_poll.prg were assembled with the Ophis assembler:
 
    https://hkn.eecs.berkeley.edu/~mcmartin/ophis/
@@ -19,23 +18,25 @@ Both hello.prg and echo_poll.prg were assembled with the Ophis assembler:
 3. echo_irq.rom
 
   This is another echo program, and behaves identically to echo_poll.prg,
-  except it is interrupt-driven.
+  except it is interrupt-driven. This ROM can be loaded either through the
+  "File->Load ROM..." menu in Symon, or by specifying the path to
+  "echo_irq.rom" with the "-jar" command line option when running Symon,
+  for example: `java -jar symon-1.3.2.jar -rom samples/echo_irq.rom`
 
 4. ehbasic.rom
 
    This is Lee Davison's Enhanced 6502 BASIC.
 
-   To use this ROM image, just copy the file 'ehbasic.rom' into the directory
-   where you run Symon. Rename the file to 'rom.bin'.  When you start Symon,
-   the ROM file will be automatically loaded at address $d000.
+   The EhBASIC ROM can be loaded either through the "File -> Load ROM..."
+   menu in Symon, or by specifying the path to "ehbasic.rom" with
+   the "-jar" command line option when running Symon, for example:
+   `java -jar symon-1.3.2.jar -rom samples/ehbasic.rom`
 
    Click the "Run" button and EhBASIC should automatically start running.
 
    Type 'C' to do a cold start.
 
-   Then, type $C000 when prompted for the memory size.
-
-   NOTE: EhBASIC only wants upper-case input. This confused me at first!
+   Then, type '49152' (without the quotes) when prompted for the memory size.
 
    More information can be found in the 'ehbasic' directory, and by visiting
    the EhBASIC web page: