EmptyRomGenerator.ps1

# This script was generated by ChatGPT using the prompt:
#   Good afternoon. I need a PowerShell script that will output a text file to represent the contents of an empty ram. The script should take the ROM size in bytes and output a text file with each byte represented in hex. An example would be x"00" . This file will be pasted into VHDL which needs that format to represent a hex value. 
#   The script should output 4 bytes per line and output the number of bytes specified, each byte set to 00
#   Can you update the script to output, in VHDL comment format, the address every 128 bytes, this way users can easily see what address a block text relates to
#   Can you add a trailing comma to each line, except for the last line?
param (
    [int]$RomSize = 1024,
    [string]$OutputFile = "output.txt"
)

# Initialize an empty array to store each line's contents
$lineArray = @()

# Open the output file for writing
$outputStream = [System.IO.StreamWriter] $OutputFile

# Loop through the specified ROM size
for ($i = 1; $i -le $RomSize; $i++) {
    # Add a VHDL comment for the address every 128 bytes
    if (($i - 1) % 128 -eq 0) {
        $addressComment = "-- Address: 0x" + "{0:X4}" -f ($i - 1)
        $outputStream.WriteLine($addressComment)
    }

    # Add the hex byte to the current line array
    $lineArray += 'x"00"'

    # If the current line has 4 bytes, write it to the file
    if ($i % 4 -eq 0) {
        $lineText = ($lineArray -join ', ')
        # Add trailing comma except for the last line
        if ($i -ne $RomSize) {
            $lineText += ","
        }
        $outputStream.WriteLine($lineText)
        # Clear the current line array
        $lineArray = @()
    }
}

# Close the output file
$outputStream.Close()