Apple 310 manual Memory Capabilities, ROM Capability

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C H A P T E R 1

LaserWriter Select 310 Hardware

Memory Capabilities

1

The standard conﬁguration of the LaserWriter Select 310 printer comes with 1MB of ROM and 1.5 MB of DRAM. Figure 1-6 shows the positioning of the DRAM and ROM on the printer’s main circuit board.

Figure 1-6The ROM and DRAM locations on a printed circuit board

SIMM card slot

8-megabit ROM

DRAM

512K x 8

Presents

512K x 8 32-bit interface to microprocessor

256K x 16

Centronics connector	Serial port

Detail of SIMM card

72-pin SIMM card accomodates up to 8 DRAM devices. Layout of devices on board depends upon manufacturer.

Pin 1

Pin 36 Pin 37

Pin 72

8 256K x 4 DRAMs provide 1 MB of storage.

8 1 megabit x 4 DRAMs provide 4 MBs of storage.

Note: You must use 32-bit wide SIMMs.

ROM Capability

1

The LaserWriter Select 310 printer has a single ROM installed on the board. It

is an 8-megabit, 42-pin masked ROM, and it stores the diagnostic software, fonts, and PostScript interpreter required by the printer. Currently you cannot expand ROM capacity.

Memory Capabilities

9

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Contents Apple LaserWriter Select 310 Printer Limited Warranty on Media and Replacement Contents Page Communication Channels Page Figures and Tables Page What This Note Contains About This NoteOther Reference Material Conventions Used in This NoteApda For More InformationPage LaserWriter Select Hardware1 LaserWriter Select 310 Hardware ROM Serial Port for RS-232C Devices Communication Ports2An 8-pin serial port connector Centronics Parallel ConnectorPstrobe Signal Status Lights ROM Capability Memory CapabilitiesBatch Mode Basic OperationDram Expansion Types Interactive ModePaper Handling 7Paper handling options Page LaserWriter Select 310 Software Software Overview Adobe PostScript Programming LanguagePostScript Interpreter Types LaserWriter Select 310 DriverSelects the paper tray containing A4-size paper and sets Product Strings Software ParametersCommunication Device Parameters Compatibility OperatorsStatusdict Setting Compatibility Operators Device Checkpassword Setting System ParametersDefaulttimeouts IdlefontsProduct PrinternameProductA RamsizeSetdefaulttimeouts SetpasswordSetidlefonts Defaultmultipurposetraysize Setting Page Device ParametersDefaultpapertray SetprinternameManualfeed ManualfeedtimeoutMargins PagestackorderSetdefaultmultipurposepapertraysize PapersizePapertray Setdefaultpapertray SetdostartpageSetmargins Setpagestackorder SetpagetypeSetpapertray Jobtimeout Setting User ParametersSetjobtimeout JobnameSetting Device Parameters WaittimeoutSetsoftwareiomode Setting Communication Parameters SoftwareiomodePacketbackchannel Setpacketbackchannel SccbatchSetting Engine Device Parameters SetsccbatchDarkness Setdarkness Setting Extensions to PostScript LevelCurrentcacheparams CurrentpackingSetcacheparams PackedarraySetpacking Printer Error ParameterPostScript Language Changes PrintererrorPacked Arrays Packed Arrays Versus Ordinary ArraysCreating Packed Arrays Immediately Evaluated Names Changes in Font Cache Operation Device Resolution ImagesEnd-of-Line Recognition New Operators TrueType FontsCommunication Channels Baud Rates Serial CommunicationParity Settings Flow ControlDTR Flow Control XON/XOFF Flow Control SCC Operator EncodingSimple Communication Protocol Communication ProtocolsBinary Communication Protocol SOH CTL-A Parallel Interface Communicating with an IBM PCDTR Flow Control for PC Communication Serial InterfaceXON/XOFF Flow Control for PC Communication Communication DynamicsStatus Queries and Spontaneous Messages Errorerror OffendingCommand operator %%