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Disk Management System

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RO. Box 397 Stn.A Vancouver, B.C. Canada V6C 2N2 Telephone (604) 682-7646

Vehicle maintenance weather and maintenance performed. A noticeable improvement has been seen in the MPG during the past eight months due to proper and timely maintenance.

When time permits, I am continually making changes that speed up the program or improve it. Currently, subroutines are being added to SUMMARY/BAS so that year-to-date totals are included on the reports. When budget time arrives this spring, each department supervisor will be able to project the year's maintenance and fuel needs much more accurately.

Modifications and Considerations The advantage of data storage on disk is well known. For the record, on the first 5y4" minidisk filled with data, a total of eight months are stored; 3,195 entries for a total of 165.1K. The equivalent in paper fills a large box in the storeroom.

103 vehicles and pieces of equipment are included in our current data files, but the number could just as easily be 50 or 200. Access time would be speeded up or slowed according to the number. Almost any number of entries per month could be handled with the limit being determined by the preference of the programmer or operator. Prior to having a 48K machine, I managed by "overlapping" two or more sorts in order to move the appropriate data to its proper place in the stack. For a sizeable fleet, 32K is required and 48K is recommended.

The major difference between our Model I and Model III versions is the method of sorting data. In the Model I version, a machine language program called SORT/CMD was used and loaded under DOS. This was accessed by the USR function. On the Model III, this was replaced with a short CMD"0" subroutine.

Currently, MAINT/BAS is 10.8K in length and SUMMARY/BAS is 5.3K. For the moment, either can be loaded and run in our 48K with enough RAM available to facilitate current arrays and the number of entries. As the programs grow, or if a smaller RAM machine is used, shorter routines could easily be accessed by a main menu which would leave as much RAM as possible for data manipulation.

When I originally wrote these two programs, they were designed for the City of Lander's specific needs and our particular maintenance program. Since then, I have not seen a similar program advertised or listed anywhere. If anyone has written one, I would like to compare notes. ■

Since the submission of this article, Mr. Clack has enhanced and updated the programs he has described. Readers who desire further information about the programs (Model I or HI) should contact Mr. Jeffrey D. Clack, 1974 South Clarkson, Denver, CO 80210. The programs are still being actively used by the City of Lander, Wyoming. —Ed.

From Computer Plus to YOU...

PLUS after PLUS after PLUS

Model 16 12SK

1 Drive 54199

2 Drive 54799

Model 16 12SK

1 Drive 54199

2 Drive 54799

Color Computer 16K S235 W/16K Exl Basic $305 W/32K Ext Basic S420

Color Computer 16K S235 W/16K Exl Basic $305 W/32K Ext Basic S420

Model III 16K $699 Model III 48K 2 Disk & RS232 c S1549

Model III 16K $699 Model III 48K 2 Disk & RS232 c S1549

Ofcldata 80 S 320 Okidata «2A 5399 Okidata 92 5510

Ofcldata 80 S 320 Okidata «2A 5399 Okidata 92 5510

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