As per my knowledge Knoppix iso still does not support direct ISO chainload and (hd32) or (0xFF) mapping.
Intel Core i7-9800X i7 9th Gen X-series 3.8 Eight-Core LGA2066 CPU Processor
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Intel Core i5-8500 Six Core Desktop PC CPU Processor 3.00GHz LGA1151 SR3XE
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Intel Core i7-4790K 4.00GHz Processor
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Intel Core i5-12600KF - 12th Gen Alder Lake 10-Core (6P+4E) 3.7 GHz LGA CPU
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Matched pair Intel Xeon E5-2667v4 SR2P5 3.20GHz, 8 core, 25MB Processors LGA2011
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