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srec_os65v - Man Page

OS65V Loader file format


This format is used by Ohio Scientific OS65V-compatible loaders.  This family of machines includes the OSI C1P, Superboard II, C2, C4, C8, and Challenger III, as well as the UK101, and Elektor Junior.

The file startes with a period '.' (0x2E), to ensure address entry mode.  then a 4-digit hex address, followed by a slash '/' (0X2F) to enter the data entry mode.  The initial address is always present. There is no need for an additional address record unless there are gaps.

Each data byte is represented as 2 hexadecimal characters, and is separated by a carriage return character (0x0D) (advance address). The final return character may be omitted.

The data is concluded with a period '.' (0x2E) to re-enter address mode.  If an address to start execution is specified, then the last 5 bytes are nnnnG where nnnn is the 4-digit execution address, and G is the 'Go' command.

Size Multiplier

In general, binary data will expand in sized by approximately 3.0 times when represented with this format.


Here is an example ascii-hex file. It contains the data “Hello, World[rq] to be loaded at address 0x1000, with execution at 0x1003.  (On a 6502, this is the opcode for indirect jump to 0x2C6F.)



Scott FinneranE-Mail:scottfinneran@yahoo.com.au
Peter MillerE-Mail:pmiller@opensource.org.au

Referenced By

srec_cat(1), srec_input(1).

SRecord Reference Manual