Glaring Omissions Dept.

Far and away, the most common problem experienced by ZX PRO/FILE owners is enlarging the DS array to make use of a larger memory pack. It seems that the dummy who wrote the book was so concerned with getting the program lines on page 42 printed correctly that he completely forgot to tell you to RUN 4000 before going to line 17. Anyway, Joanna Grammon of New York City sent these directions that will increase Capacity to 42002 bytes.

(Numbers 1-3 should be carried out immediately after powering up the computer)

1. POKE 16389,255
2. NEW
3. PRINT PEEK 16389 (answer: 255)
4. LOAD “ZX” (16K version)
5. Turn on tape recorder, then ENTER.
6. After getting Main ZX Menu, hold SHIFT and press “1”, This deletes the quotes on the bottom line.
7. Press STOP, then ENTER.
8. Type CLEAR and ENTER.
9. Add the following program lines from page 42 of the PRO/FILE manual.

4000 DIM D$(10505,4)
4010 LET L=PEEK 16400+256*PEEK 16401 
4020 POKE L+1,41
4030 POKE L+2,164
4040 POKE L+3,1
4050 POKE L+4,38
4060 POKE L+5,164
4070 POKE L+6,0
4080 LET P=0
4090 LET S=1
4100 LET C1=3
4110 LET C2=11
4120 LET E=0
4130 LET Y$=""
4140 LET Q$=DS( TO 32)

10. After checking program lines, RUN 4000.
11. You will now be in the program listing. To get back to the menu, GOTO 17.
12. Type “A” which puts you into ADD mode.
13. Stop the cursor on line 1 and input in reverse graphics: (space)SEARCH IS COMPLETE
14. Close the file to return to Main Menu. SPACE OPEN should say 42002 SLOTS.
15. If you held your mouth right, you should have done these steps with little or no difficulty. NOW, before doing anything, make 1-2 copies of the 64K expanded program. (saving time is +20 minutes–use a long enough tape!)