---
name: "srec_fastload"
section: "5"
platform: "linux"
package: "srecord"
version: "1.64-4.1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/srec_fastload"
---

# srec\_fastload(5)

LSI Logic Fast Load file format

## NAME

srec\_fastload - LSI Logic Fast Load file format

## DESCRIPTION

The FastLoad Format uses a compressed ASCII format that permits files to be downloaded in less than half the time taken for Motorola S‐records.

The base‐64 encoding used is "A‐Za‐z0−9,.".  The data is encoded in groups of 4 characters (3 bytes, 24 bits).

The character '/' is used to introduce a special function. Special functions are:

- A*nnnnnn*

  Defines an address.

- B*nn*

  Define a single byte.

- C*nnnn*

  Compare the checksums. The checksum is a simple positive 16‐bit sum, of the data bytes only.

- EAA

  Define the program's entry point. The address will be the current address as defined by the **A** command. (The *AA* number in this command is ignored.) This must be the last entry in the file.

- KAA

  Clear the checksum. (The *AA* number in this command is ignored.)

- S*name*,X

  Define a symbol. The address of the symbol will be the current address as defined by the **A** command.

- Z*nn*

  Clear a number of bytes.

### Size Multiplier

In general, binary data will expand in sized by approximately 1.4 times when represented with this format.\

## EXAMPLE

Here is an example LSI Logic Fast Load format file. It contains the data “Hello, World\[rq\] to be loaded at address 0.

```
/AAAA
SGVsbG8sIFdvcmxk/BAK/CARS/AAAA/EAA
```

## COPYRIGHT

*srec\_cat* version 1.64\
 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Peter Miller\

The *srec\_cat* program comes with ABSOLUTELY NO WARRANTY; for details use the '*srec\_cat -VERSion License*' command. This is free software and you are welcome to redistribute it under certain conditions; for details use the '*srec\_cat -VERSion License*' command.\

## MAINTAINER

| | | |
| --- | --- | --- |
| Scott Finneran | E‐Mail: | scottfinneran@yahoo.com.au |
| Peter Miller | E‐Mail: | pmiller@opensource.org.au |