General 1-5
1.3
FIRMWARE AND CHARACTER GENERATORS
Basic emulations
The basic firmware, contained on 1 Mbyte ROM assembled on the BA X100
board, emulates the HP Deskjet 500 and HP Deskjet 500C printers, with the
corresponding character generators.
The machine automatically makes the selection between the two emulations
according to the type of cartridge installed (black ink cartridge: HP Deskjet 500;
color inks cartridge: HP Deskjet 500C).
Optional emulations:
The available optional emulations are EPSON LQ 850 and IBM Proprinter 4207.
Each emulation includes the relevant set of characters and both are contained on a
specific card.
The optional emulations cannot handle optional fonts on the memory card. To
enlarge the LQ 850 and 4207 emulation graphic fonts, the memory extension
memory card must be inserted to handle the DLL functions (Down Line
Loading).
Character generator:
The task of the character generator is to assign a specific printable character to
each code included in the graphic set.
The first 128 codes in the ISO table (0-127)are the standard USA ASCII
character set. This group does not include national variations or semigraphic
symbols.
The assignment of the codes included in the second ISO set table (128-255)
varies from country to country and from product to product.
_______________________ Note _____________________________
For full and up-to-date details of the character sets and command
codes, please refer to Appendix D of the User Guide
Summary of Contents for DECcolorwriter 520ic
Page 1: ...DECwriter 500i DECcolorwriter 520ic LJ500 and LJ520 Service Manual EK LJ50E SV A01...
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Page 80: ...Electrical Interconnections 8 2 8 2 POWER SUPPLY BOARD...
Page 81: ...Electrical Interconnections 8 3 8 3 POWER SUPPLY CIRCUIT ON MAIN BOARD...
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