OT: Sharp PC-1246S



#10

I have a 1246S with a special feature (please see photos).
I believe it is to increase the memory.
Someone could help me how to use?

Photo 1
Photo 2
Photo 3


#11

I tend to think it's a speedup switch rather than a memory switch.

OT: I once had one of those 1246S. The rubber coated keyboard is awful, the contact domes under the rubber were very unreliable...


#12

Quote:
I tend to think it's a speedup switch rather than a memory switch.

It's hard to tell from the third photo, but there could be a second RAM chip soldered on top of the other with the red switch selecting one of the two.

The way to find out would be to enter a short program, set the switch to the other position and see, if it's still there. And vice-versa.


#13

I've tried and nothing has changed (program)
#14

Does not increase the speed I've tested (Calculator Speed Benchmark using the N-Queens Problem)

#15

Max, it may likewise be a higher capacity RAM but the effects of the switch are probably the ones you suppose.

#16

Possibly with double the memory, and the switch selects between two banks?


#17

Memory (MEM) reports 7,422 bytes in any position
I think I've found the switch function.
There are two banks of variables (a. .. z).
They are preserved function equal to P <> S HP-67

#18

That's basically what I said. I think you'll find that it's not just the variables.


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