S3E02 Synapse SynTrend (SynStat, SynGraph) – Supplement

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This episode features SynTrend, originally released in 1983, and again in 1985 by Synapse.  SynTrend is comprised of two titles, SynStat and SynGraph.

Box and Supplement Scans

Scan of the front of the box:

SynTrend Box Front


Scan of the back of the box:

SynTrend Box Back


SynStat in Action

At boot …

SynStat Boot Splash


Main Menu:

SynStat Main Menu


Manipulate Data

The menu:

SynStat Manipulate Menu



The loading screens from the 1983 version:

SynStat Edit 1 83

SynStat Edit 2 83


The loading screens from the 1985 version (in a different text mode, and does not offer the additional informative text after the actual disk load is complete):

SynStat Edit 1 85


The editor has a spreadsheet type entry (ENTRY mode).  Press ESC for the menu:

SynStat Edit 3


Editor menu:

SynStat Edit 4


Command menu options:

SynStat Edit 5


After data has been loaded from a file:

SynStat Edit 5


Label mode allows changing of the column labels:

SynStat Edit 6


Save File

Change the drive number with SELECT.  Use RETURN to continue:

SynStat Edit 7


Enter the file name:

SynStat Edit 7 2


Wait for it to write the file:

SynStat Edit 7 3


Define command

Using the DEFINE menu option with data already loaded:

SynStat Edit 8


Selecting the number of columns:

SynStat Define 2


Math commands

The math command sub menu:

SynStat Math


LN (Logarithm) of a Column:

SynStat Edit 11


Using FORMAT option:

SynStat Edit 13 1

SynStat Format 2


Load File

Use SELECT to change the drive number.  Use RETURN to continue:

SynStat Load 1


Entering the filename.  Why no directory or file picker?

SynStat Load 2



Returning to the main program menu.  It must be reloaded from disk:

SynStat RETURN 1


Whoops!  Wrong disk inserted:

SynStat Return 2



You can only format a disk in drive 1:

SynStat Format Menu



Subtle reminder to put program disk back in after formatting.  Notice top line of screen:

SynStat Format 3


DIF To SynStat

Follow the prompts.  This works like SynStat To DIF:

SynStat DIF From


SynStat to DIF

Follow the prompts:

SynStat Dif To 1

SynStat Dif To 2

SynStat Dif To 3

SynStat Dif To 4


Analyze Data

Loading the Analyze Data module:

SynStat AD Load



Choose the file:

SynStat AD Select 1


Choose the data:

SynStat AD Select 2



SynStat AD Select 3

SynStat AD Select 4



SynStat AD Select 5


Descriptive Results

SynStat AD Results 1



Choose the file:

SynStat AR Select 1

SynStat AR Select 2


Choosing independent variable:

SynStat AR Select 4


Error encountered:

SynStat AR Select 3 Err


Choosing dependent variable:

SynStat AR Select 3


Regression Results

SynStat AR Result 1

SynStat AR Result 2

SynStat AR Result 3

SynStat AR Result 4

SynStat AR Result 5


SynGraph in Action

Main Menu:

SynGraph Menu


Edit Data

Put the data disk in the drive:

SynGraph Edit 1


Select the data file:

SynGraph Edit 2


Editing the data points:

SynGraph Edit 3



Select the CREATE option to create a data set if none exist on disk:

SynGraph Edit Create 1


Editing the data points:

SynGraph Edit Create 2



View Graph

Select the data disk:

SynGraph View 1


Choose the previous graph to view:

SynGraph View 2


Graph Data

Graph type menu:

SynGraph Graph Menu


Bar Graph


SynGraph Bar 1

SynGraph Bar 2

SynGraph Bar 3

SynGraph Bar 4


Season 1 results:

SynGraph Bar 5 1


Season 2 results:

SynGraph Bar 5 2


Line Graph


SynGraph Line 1

SynGraph Line 2

SynGraph Line 3


Season 1 results:

SynGraph Line 4 1


Season 2 results:

SynGraph Line 4 2


Graph Menu

The menu invoked among all graph types being demonstrated from the Line graph:

SynGraph Line 5


When printing, select the printer type:

SynGraph Line 6


When Saving, insert the data disk.  The name will either be GRAPH (if you didn’t enter one), or the name you input during graph setup:

SynGraph Line 7


Scatter Plot


SynGraph Scatter 1

SynGraph Scatter 2

SynGraph Scatter 3

SynGraph Scatter 4


Scatter results:

SynGraph Scatter 5


Pie Chart


SynGraph Pie 1

SynGraph Pie 2


There are a maximum of 12 slices:

SynGraph Pie 3


Pie Chart results:

SynGraph Pie 4




SynTrend uses Atari DOS 2.0 compatible disk format.  The contents of a disk can be seen in this screenshot:



The files are:

  • DAT files are data files.
  • IDX files are index files for the data.
  • DIF files are Data Interchange Format files.
  • SCR files are previously plotted graphs.



SynStat Analysis – Regression:






SynStat Analysis – Descriptive:


SynGraph – Bar Chart:



SynGraph – Line Graph:



SynGraph – Pie Chart:


SynGraph – Scatter Plot:



Show Links:


Bit Rating 8


Intro music is an excerpt from a chip tune by Wizwars named 8 Bit Raceway.  It is used under Creative Common license Attribution-NonCommercial-ShareAlike 3.0 United States.

2 thoughts on “S3E02 Synapse SynTrend (SynStat, SynGraph) – Supplement

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