HP7550 Plus plotter, Programming Manual

[Martin Hepperle]

Now that I have also obtained such a machine (indeed great machine) I have also checked the accessory list:

HP 7550 Plus

• 07550-90000 Hardware Support Manual
• 07550-90001 7550A Interfacing/Programming Manual (for HP-GL programming in 7550A emulation mode only)
• 07550-60050 Additional fiber-tip transparency pen carousel
• 07550-50051 Additional fiber-tip paper pen carousel
• 07550-60052 Roller-ball pen carousel
• 07550-60053 Liquid-ink drafting pen carousel
• 33474B 1-Megabyte Memory Board
• 33475B 2-Megabyte Memory Board
• 5959-9733 HP-GL/2 Reference Guide
• 5959-9734 HP-GL/2 Product Comparison Guide
  

The memory boards seem to be identical to LaserJet III parts. The last two items are not 7550 specific.
Martin