Fixing the Forget-Me-Not Clock software

Fixing the Forget-Me-Not Clock software

Techie Allison has found that by tweaking a few bytes inside the FMC_II.PRG file, you can get past it's problem of only lasting until 1999.

FINDINGS

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Location: 000D87 Original Value : 63h

When clicking DOWN, this is the maximum year value we roll around to. If the year is 80, and we click down, it rolls round to 99. This is that '99 value.

Location: 000D7D Original Value : 50h

When clicking DOWN, this is the lowest value we can go before it rolls over. This is the minimum year. This is that '80 value. When we hit this number, it rolls around.

Location: 000EF2 Original Value : 50h

When click UP, this is the value we roll around to. Clicking on '99 will rollover to this number.

Location: 000EE7 Original Value : 63h

This is the maximum year we can go to, when clicking UP.

PROPOSALS

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Ideally we want to count from 00 to 99 and to rollover from 99 to 0.

The following changes are to be made;

Location: 000D7D Original Value : 50h New Value: 00h

Location: 000EF2 Original Value : 50h New Value: 00h

TESTING

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Within Steem seems functional. Occassionally causes bombs. No clock cartridge. But counters apparently functional.

On a 4Mb STFM... IT DOES NOT WORK!!!

FAILURE!!!!!

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When setting the FMCII cartridge. ANY number BELOW 80 causes an error, "Incorrect number of days in month."

CONCLUSION

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WE CANNOT HAVE THE COUNTER RUNNING FROM 0 thru 99.

PROPOSALS

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Revert to original idea, of setting past 1999. 80 must be the MINIMUM value. 128 will be the MAXIMUM value, thus a maximum year of 2028

Location: 000D87 Original Value : 63h New Value: 80h

Location: 000EE7 Original Value : 63h New Value: 80h

MAXIMUM YEAR OF FMCII

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Testing indicates that 2059 is the maximum year. We will therefore release this as FMCII_9F.PRG. 9F is 159 in decimal.