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48SX and 82215A 128KB RAM card odd behavior
03-22-2014, 09:47 PM
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RE: 48SX and 82215A 128KB RAM card odd behavior
(03-22-2014 03:47 AM)cruff Wrote:  My first thought was a battery issue. The card's battery was at 2.9V, and a new battery (3.2V) does not change this behavior. The calculator's batteries are at 4.5V. Do I remember correctly that while plugged in, the calculator will supply power to the RAM card when the calculator is off?

The 48 will only power the card while it is switched on. This is why you should leave the calculator ON when replacing the battery in an expansion card, so the calculator can keep the SRAM alive.

When swapping cards, the 48 will warm start, resulting in a clear stack. Perhaps your 48 thinks the card is being removed whenever it powers off. What happens if you FREE the card, and toss a couple objects into port 0? Do they persist after a normal power cycle?
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RE: 48SX and 82215A 128KB RAM card odd behavior - Dave Britten - 03-22-2014 09:47 PM



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