OT: Sharp PC-1246S


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


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...


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.


I've tried and nothing has changed (program)

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


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


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


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


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

Possibly Related Threads...
Thread Author Replies Views Last Post
  Sharp PC-1350 user manual (english) Basil 8 2,075 07-09-2013, 04:50 AM
Last Post: Marcus von Cube, Germany
  New screen on pictures of new Sharp EL-9950 Mic 4 1,510 06-10-2013, 10:40 AM
Last Post: Mic
  New graphing calculator by Sharp ! Mic 1 856 06-07-2013, 09:56 PM
Last Post: Eddie W. Shore
  Sharp PC-E500 question Basil 1 882 04-30-2013, 03:54 AM
Last Post: Chris Smith
  Almost totally OT: Looking for Sharp EL-9900G ROM upgrade Marcus von Cube, Germany 3 1,174 03-03-2013, 09:35 AM
Last Post: Marcus von Cube, Germany
  OT: A question about the Sharp EL-8131 Marcel Samek 11 2,408 02-13-2013, 03:10 PM
Last Post: Massimo Gnerucci (Italy)
  OT: Forth on Sharp PC-1500 Bill (Smithville, NJ) 3 1,095 12-10-2012, 12:53 PM
Last Post: Bill (Smithville, NJ)
  Sharp PC-1500 question (F2 button disabled?) LHH 7 1,604 12-03-2012, 08:34 PM
Last Post: LHH
  OT--Palm & Sharp Wizard need tech care Matt Agajanian 9 2,102 08-28-2012, 11:54 PM
Last Post: Matt Agajanian
  Sharp PC-1211 update Gene Wright 3 1,031 05-25-2012, 11:56 AM
Last Post: Peter Geiser

Forum Jump: