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Setting Up for QuickSim II
Using RAMs and ROMs
If any X's appear on the ROM address bus, the ROM
outputs all X's on the data bus.
Modelfile property value--pathname to ASCII file:
• Data and addresses must be hexadecimal or X
• Specify memory data using the form:
o address / data ; or
o low_address-high_address / data ;
• Any letter can be in upper or lower case
• Underspecifying--simulator fills in with zeros
16-bit example: FF = 00FF
Example 1: Initializing RAMs or ROMs to zero:
# 16-bit input-output
0-FFFF / 0 ; # Put zeros in all memory locations
0-ffff / f ; # Put 000F in all memory locations
Example 2: Using X in ROM or RAM modelfile:
# 16-bit input-output
00000 / 0 ;
# Put value of zero into location 0
FFXX / 1234 ; # Illegal addresses
FF00 / 1234 ; # Put value of 1234 into location FF00
FF00 / 11234 ; # Illegal data
FF00 / 12XX ; # Put value of 12XX into location FF00
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QuickSim II Advanced Training Workbook, 8.5_1
November 1995