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Status test for Casio calculators FX-880p and FX-850p.

Posted on by javitopo

In our lovely calculators are some programs from the library not documented in the manual and not in the paper enclosure in the list of programs that comes with the calculator.

Some of these hidden programs, are:

  • 0400 ->Testing program of the calculator.
  • 0800 ->Program for the printer.
  • 0900 -> Converter of PB100 to FX-850P.

To run the program you have to push the number of the program and then the key “LIB”.

 

Of these three, the one that seems most interesting to me is the 0400, the testing program.

It informs you of the memory installed on the Casio, and also it tells you how much memory you have installed in the expansion module.

Test casio 1

 Test the RAM and the ROM and it tells you whether they are fine. Test casio 2 It shows all the pixels of the calculator lit in three different screens, for you to make you see easily whether there was a dead pixel.Test casio 3Test casio 4Test casio 5 Finally, it takes a “Printer CHECK” that I am not actually sure whether it means a check out of the port, or to plug a printer to check it out. Test casio 6

The exact code of the program is in the popular annex at the manual of Alchemist

 

Library: 0400              Test of the calculator

10 CLEAR:CLS:DEFSEG=0:K=PEEK(&H6B4)/4+PEEK(&H6B5)*64
20 IF   K<32 THENK1=8:K2=K-K1
30 IF   K=32 OR K=64 THENK1=32:K2=K-K1
40 IF   K=40THENPOKE&H8000,10:POKE0,0:IFPEEK&HA000=10THENK1=32:K2=8ELSEK1=8:   K2=32
50 PRINT”Main”;K1;TAB(8);”Kbyte   Option”;K2;”Kbyte”;:PRINT:A=64:D=1:A1=0
70 GOSUB1000:A=A+A:D=(D+D)MOD256:IF   A<K*1024 THEN70
80 FORI=1   TO9:A=K*1024-A1-1:IF I=5 OR I=9 THEND=&H80 ELSE D=&H20
100 GOSUB1010:IF   A1=0 THENA1=1 ELSEA1=A1*2
110 NEXT
120 A=K*1024-A1-1:GOSUB1000:A1=A1*2:IF   A1<K*1024 THEN120
130 PRINT”   OK    RAM”;:GOSUB10000:PRINT:DEFSEG=&H4000
160 ROM=(PEEK(4)+1+PEEK(5)*256)*2
170 IF   PEEK(0)<>&H43 THENPRINT”NG ROM 1″;:GOTO1030
180 IF   ROM<>1024 THEN200
190 D1=PEEK(&H5955):D2=PEEK&HA6AA:D3=PEEK&HFFFF:DEFSEG=&H5000
191 D4=PEEK0:D5=PEEK&H5955:D6=PEEK&HA6AA
192 IF   PEEK&HFFFF<>&H20 THENPRINT”NG ROM 2″;:GOTO1030
193 PRINT”OK   512K*2 ROM?”;:PRINT
194 PRINTRIGHT$(HEX$(D1),2);”   “;RIGHT$(HEX$(D2),2);” “;RIGHT$(HEX$(D3),2);” “;RIGHT$(HEX$(D4),2);”   “;RIGHT$(HEX$(D5),2);” “;RIGHT$(HEX$(D6),2);””;:GOTO210
200 IF   PEEK(ROM*128-1)<>&H20 THENPRINT”NG ROM 1″;:GOTO1030
201 D1=PEEK&H5955:IF   ROM=256 THEND2=PEEK&H26AA ELSE D2=PEEK&HA6AA
202 PRINT”OK”;STR$(ROM);”K   ROM?”;:PRINT
203 PRINTRIGHT$(HEX$(D1),2);”   “;RIGHT$(HEX$(D2),2);” “;
210 GOSUB10000
220 CLS:FOR   I=0 TO 63:PRINTCHR$(&HFF);:NEXT:LOCATE 0,0
230 DEFCHR$(&HFF)=”FFFFFFFFFF”:GOSUB10000:DEFCHR$(&HFF)=”0000000000″:   GOSUB10000
250 DEFCHR$(&HFF)=”AA55AA55AA”:GOSUB10000:DEFCHR$(&HFF)=”55AA55AA55″:TRON:   GOSUB10000:TROFF
280 CLS:PRINT”Printer   CHECK”;:LPRINT:GOSUB10000
290 LPRINT”Main”;K1;”Kbyte   Option”;K2;”Kbyte”
320 FOR   I=32 TO 255:IF I=&H7F THENI=&H80
330 LPRINTCHR$(I);:NEXT:LPRINT
350 PRINT”RS   232C CHECK”;:PRINT:GOSUB10000
360 OPEN   “COM0:5,E,8,2,C,D,C,B,N” AS #1:PRINT#1,123:INPUT #1,D
390 CLOSE:IF   D<> 123 THENPRINT”NG RS 232C”;:GOTO1030
410 PRINT”OK   RS 232C”;:GOSUB10000:PRINT
420 PRINT”MT   CHECK    <REC>”;:PRINT:GOSUB10000
430 OPEN   “CAS0:TEST” FOR OUTPUT AS #1:PRINT#1,”ABC”:CLOSE
460 PRINT”MT   <REW> and <PLAY>”;:PRINT:GOSUB10000
470 OPEN   “CAS0:TEST” FOR INPUT AS #1:INPUT #1,A$:CLOSE
490 IF   A$<>”ABC” THENPRINT”NG MT”;:PRINT:GOTO1030
510 PRINT”OK   MT”;:PRINT
520 END
1000 POKE   A,D
1010 IF   PEEKA=D THENRETURN
1020 IF   A>=K1 THENPRINT”NG RAM 2″; ELSE PRINT “NG RAM 1”;
1030 BEEP:GOTO1030
10000 BEEP:IF   INPUT$(1,@)=CHR$(0) THEN10000ELSE RETURN
javitopo

10 thoughts on “Status test for Casio calculators FX-880p and FX-850p.”

  2. Pichai says:

    Hello, I have a big problem occur with my FX-880P.
    When I want to run a program such as P0, I got the message “OM error P0-1”.
    Then I try to check the Library Number 5050 which is quardratic equation, it appears “OM error”.
    Could you please tell me how to solve this problem.
    Thanks in advance.

    • javitopo says:

      Sorry for late answer, I was traveling

      OM error

      MEANING

      a) lnsufficient memory ar system overflow.

      b) Erroneous CLEAR statement specífication.

      CORRECTION

      a) Shorten program and check array dimensioning.

      b) Check CLEAR statement value.

      c) Use RAM expansíon pack.

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