Brother HL-1800 series - Manual (Page 113)

4-10
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Minimum Memory Recommendation
HL-1850 (Including 16 Mbytes of Internal Memory)
HP LaserJet, EPSON FX-850, and IBM Proprinter XL emulation modes
300 dpi 600 dpi HQ1200
Letter/A4 Standard Standard Standard
Legal Standard Standard Standard
BR-Script 3 mode
300 dpi 600 dpi HQ1200
Letter/A4 Standard Standard Standard
Legal Standard Standard Standard
Duplex printing
300 dpi 600 dpi HQ1200
HP LaserJet Standard Standard 32 Mbytes
BR-Script 3 Standard Standard 32 Mbytes