F$DATLog

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DAT to Logical Address Converts a DAT image block number and block offset to its equivalent logical address
OS9 F$DATLog 103F 44

Entry Conditions

B DAT image offset
X block offset

Exit Conditions

X logical address

Error Output

CC carry set on error
B error code, if any

Additional Information

  • Following is a sample conversion:
2000 - 2FFF   Input: B = 2
X = $0329
1000 - 1FFF   Output: X=$2329
0000 - 0FFF    

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