I've been fighting this for weeks and could use some sanity checking from anyone who's dealt with old parallel printers. I have an Epson EPL-5700 laser printer, which is old enough that it never had USB, only a Centronics/DB25 parallel port. The official Epson driver is a 32-bit installer from around 2000, and predictably it won't install on Windows 11 due to signing and architecture restrictions.
To get around this I bought a generic USB-to-parallel adapter cable, no name brand, unbranded chipset, resold under a local distributor sticker. When I print through it, from Windows 11, macOS, Linux, and even a Windows XP virtual machine, I get corrupted output, some readable text mixed with what looks like raw escape codes or PCL commands being interpreted as literal text rather than formatting instructions. Same garbled result across every OS I've tried, which made me suspect either a chipset/driver mismatch or a bad adapter, but I couldn't tell which.
The useful part: I also have an old mini PC still running Windows XP with a genuine built-in parallel port, and printing through that with the real Epson driver installed works flawlessly. Tomorrow I'm planning to test the same setup, same OS, same driver, same printer, but printing through the USB-to-parallel adapter instead of the real port, to isolate whether the adapter itself is the fault.
Before I do that, I wanted to ask if anyone has run into this exact failure pattern before. Is corrupted/garbled output like this a known symptom of cheap USB-to-parallel adapters not properly supporting bidirectional or ECP/EPP communication that older printer drivers expect? Or does this look like something else entirely, like a signaling/timing issue rather than a protocol mismatch? Also curious if anyone has had luck with a specific adapter chipset (Prolific, MosChip, etc.) actually working reliably with legacy laser printers like this one, or if a proper PCI parallel port card is really the only dependable long-term answer here. Any insight from people who've dealt with legacy Epson EPL-series printers or USB-parallel weirdness in general would be hugely appreciated.