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Cambridge Z88
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Z88 Developers' Notes

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  • Memory Management
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    Output and the screen driver
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    File Input - Output
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    Input and the keyboard decoder
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    Shell environment and ELF
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    Filters
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    Time and date management
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    Integer arithmetic
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    Standard Input - Output and the CLI
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    The Printer filter
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    The floating point package
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    Handling Alarms
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    Linked lists
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    The Serial Interface
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    The Wildcard Handler
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    DOR's
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    The Map Area
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    Installation and removal of RAM Applications
  • Miscellaneous useful routines
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    Miscellaneous useful information
  • BBC BASIC and the in-line assembler
  • Manipulating the Blink Registers
  • The Z88 Motherboard Hardware and periphial cards
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    Glossary
  • System Calls Reference
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      DC_Alt, Pass an alternative character
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      DC_Bye, Exit current process
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      DC_Dbg, Enter debugger
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      DC_Dis, Disassemble
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      DC_Elf, Executable and Linkable Format (ELF) Interface
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      DC_Ent, Enter process
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      DC_Gen, Screen driver SOH call
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      DC_Icl, Invoke new CLI
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      DC_In, Read from CLI
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      DC_Ini, initialize the Director
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      DC_Nam, Name current application
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      DC_Nq, Handle Director/CLI enquiries
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      DC_Out, Write to CLI
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      DC_Pol, Poll for application or card usage
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      DC_Prt, Print to CLI
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      DC_Rbd, rebind streams
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      DC_Rbp, Remove Breakpoint
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      DC_Rte, Return from ELF
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      DC_Sbp, Set break point
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      DC_Sp, Handle Director/CLI settings
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      DC_Upd, Update Operating System
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      DC_Xin, Examine CLI input
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      OS_Alm, Alarm manipulation
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      OS_Axm, Allocate explicit memory
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      OS_Axp, Allocate explicit page
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      OS_Bde, Copy bytes to extended address
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      OS_Bhl, Copy bytes from extended address
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      OS_Bix, Bind in extended address for availability
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      OS_Blp, Make a bleep
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      OS_Bout, Write string at (B)HL to standard output
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      OS_Box, Restore bindings after OS_Bix
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      OS_Bye, Exit application
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      OS_Cl, Internal close
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      OS_Cli, CLI interface
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      OS_Del, File delete
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      OS_Dly, Delay a given period
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      OS_Dom, Open director memory
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      OS_Dor, The DOR interface
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      OS_Ent, Enter an application
    • OS_Epr, File Eprom Interface
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        EP_SAVE ($00) - blow RAM file to Eprom in slot 3
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        EP_LOAD ($03) - read file from Eprom in slot 3 into RAM file
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        EP_REQ ($06) - Check for "oz" File Eprom or File Area in slot C
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        EP_Fetch ($09) - Copy saved/deleted file from File Area to RAM
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        EP_Find ($0C) - Find active File(name) in File Area in slot C
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        EP_DIR ($0F) - Fetch filename from Eprom in slot 3
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        EP_First ($12) - Return first file entry in File Area in slot C
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        EP_Prev ($15) - Return previous file entry in File Area
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        EP_Next ($18) - Return next file entry in File Area
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        EP_Last ($1B) - Return last file entry in File Area in slot C
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        EP_TotSp ($1E) - Return amount of used file space in slot C
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        EP_ActSp ($21) - Return active file space in slot C
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        EP_FreSp ($24) - Return free file space in slot C
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        EP_Count ($27) - Return number of files in File Area slot C
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        EP_Stat ($2A) - Return file entry status (active or deleted)
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        EP_Size ($2D) - Return file size of File Entry
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        EP_Name ($30) - Copy File entry name to buffer at (CDE)
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        EP_Image ($33) - Return pointer to start of file contents
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        EP_SvFl ($39) - Save RAM file to Flash or UV Eprom to slot C
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        EP_New ($36) - Return pointer to future new entry in File Area
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        EP_Delete ($3C) - Mark File Entry as deleted on Flash or UV Eprom
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        EP_Format ($3f) - Create File Area in slot C, on UV Eprom or Flash Card
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        EP_NewFile ($42) - Write RAM file to File Card in slot C
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        EP_WrBlk ($45), Write a block of bytes to UV Eprom in slot 3
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        EP_Fptr ($48), Get file pointer via offset into file entry image
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        EP_Empty ($4b) - Poll for empty file area in slot number C
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        EP_SvAs ($4e) - Stream opened RAM file to Flash or UV Eprom to slot C
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      OS_Erc, Get error context
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      OS_Erh, Set error handler
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      OS_Esc, Examine special condition
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      OS_Exit, Quit process (application)
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      OS_Fc, Select fast code (fast bank switching)
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      OS_Fdp, File duplicate (sector-level)
    • OS_Fep, Flash Card Interface
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      OS_Fma, Find Memory for Allocation
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      OS_Fn, Handle functions
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      OS_Frm, File read miscellaneous
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      OS_Fth, Free tri-handle
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      OS_Fwm, File write miscellaneous
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      OS_Fxm, Free explicit memory
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      OS_Gb, Get byte from file (or device)
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      OS_Gbt, Get byte from file (or device) with timeout
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      OS_Gth, Allocate tri-handle
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      OS_Hout, write a hexadecimal byte to standard output
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      OS_Ht, Hardware time manipulation
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      OS_In, Read (wait for) character from standard input
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      OS_Iso, key to ISO conversion
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      OS_Isq, Initialize prefix sequence
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      OS_Kin, Keyboard input
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      OS_Mal, Allocate memory
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      OS_Map, PipeDream map control
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      OS_Mcl, Close memory (free memory pool)
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      OS_Mfr, Free (previously allocated block) memory
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      OS_Mgb, Get current bank binding in segment
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      OS_Mop, Open memory (allocate memory pool)
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      OS_Mpb, Set new bank binding in segment
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      OS_Mv, Move bytes between stream and memory
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      OS_Nln, send new line (CR/LF) to standard output
    • OS_Nq, Enquire
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      OS_Off, Switch machine off
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      OS_Op, Internal open
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      OS_Out, Write character to standard output
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      OS_Pb, Write byte to file / device
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      OS_Pbt, Write byte to file / device with timeout
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      OS_Ploz, Poll for running OZ
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      OS_Poll, Poll for an application
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      OS_Pout, Write embedded string at (PC) to standard output.
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      OS_Prt, Send character directly to printer filter
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      OS_Pur, Purge keyboard buffer
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      OS_Ren, File rename
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      OS_Sci, Alter screen information
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      OS_Si, Low level serial interface
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      OS_Sp, Specify
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      OS_Sout, Write local string to standard output
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      OS_Sr, Save & restore operations
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      OS_Stk, Stack file current process
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      OS_Tin, Read character from standard input, with timeout
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      OS_Uash, Update application static handle in stacked process environment
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      OS_Use, Fetch information about process card usage
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      OS_Ust, Update small timer
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      OS_Vth, Verify tri-handle
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      OS_Wait, Wait for event
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      OS_Wrt, Write token
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      OS_Wsq, Write to prefix sequence
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      OS_Wtb, Write token base
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      OS_Wts, Write tokenized string
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      OS_Xin, Examine input
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      OZ_Mgb, Get memory binding
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      OZ_Mpb, Set new bank binding in segment
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      GN_Aab, Allocate alarm block
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      GN_Alp, Process an expired alarm
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      GN_Cl, Close file
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      GN_Cls, Classify character
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      GN_Cpy, Copy a file
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      GN_Cme, Compare null-terminated strings
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      GN_Crc, Get CRC-32 of ressource
  • Gliffy Diagram
Z88 Developers' Notes
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OS_Epr, File Eprom Interface
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EP_Size ($2D) - Return file size of File Entry

EP_Size ($2D) - Return file size of File Entry

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