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{{FormatInfo
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'''Checksummer''' by Frank Brall is a series of type-in program checkers for Commodore programs used by the German magazines Computronic and Compute Mit.

* Checksummer C 1.0 for C-64
* Checksummer VC 1.0 for VIC 20
* Checksummer OC 1.0 and Checksummer OV 2.0 for C-16 and Plus/4
* Checksummer OVM 1.0 for machine-language programs for C-16 and Plus/4
* CPC Checksummer v1.0 and v2.0 (by Ottfried Schmidt) for CPC 464/664/6128

The Checksummer C, VC, and OC v1.0 programs print a number from 0 to 255 for every line.

Checksummer OVM used a 2 digit hex code for every line of eight bytes.

Checksummer OV and CPC 2.0 used a 2 character code.

== Sample Output ==
[[File:Checksummer VC 1.0.jpg]] VC 1.0

[[File:Checksummer OVM.jpg]] OVM 1.0

[[File:Checksummer CPC 2.0.jpg]] CPC 2.0

== Links ==
* [https://archive.org/details/Computronic_86_03-04/page/n1/mode/2up Checksummer C 1.0 and VC 1.0] (Computronic Mar-Apr 1986 pg 3,6)
* [https://archive.org/details/Computronic_86_03-04/page/n63/mode/2up Tronic CPC Checksummer v1.0] (Computronic Mar-Apr 1986 pg 63)
* [https://archive.org/details/Computronic_86_07-08/page/n1/mode/2up Checksummer OC 1.0] (Computronic Jul-Aug 1986 pg 3)
** [http://plus4world.powweb.com/software/Checksummer_OC_1_0 Checksummer OC 1.0 at Plus/4 World]
* [https://archive.org/details/Computronic_87_07-08/page/n23/mode/2up Checksummer OV 2.0] (Computronic Jul-Aug 1987 pg 24)
** [http://plus4world.powweb.com/software/Checksummer_OV_2_0 Checksummer OV 2.0 at Plus/4 World]
* [https://archive.org/details/Computronic_87_09-10/page/n45/mode/2up Schneider CPC Checksummer v2.0] (Computronic Sep-Oct 1987 pg 47)
* [https://archive.org/details/Computronic_87_09-10/page/n25/mode/2up Checksummer OVM] (Computronic Sep-Oct 1987 pg 26)
** [http://plus4world.powweb.com/software/Checksummer_OVM_1_0 Checksummer OVM at Plus/4 World]
* [https://archive.org/details/compute-mit-1987-02/page/8/mode/2up Troubleshooting Checksummer] (Compute Mit Feb 1987 pg 9)
* [https://archive.org/details/compute-mit-1987-09/page/12/mode/2up New way of inputing special characters] (Compute Mit Sep 1987 pg 13) ([https://archive.org/details/compute-mit-1987-12/page/14/mode/2up Alternate copy])

Checksummer (Frank Brall) - Revision history

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