Clean up 2nd printing changes

CHANGES-2nd-printing.txt

@@ -1,11 +1,8 @@
-.na
-.fi
-.ll60
-.br
 SECOND PRINTING CORRECTIONS
-.sp3
+
+
 3-3
-.sp1
+
 Data bits are recorded on the
 diskette in precise intervals.  For
 the purposes of this discussion, the
@@ -16,34 +13,35 @@ and read back from the diskette takes
 the form shown in Figure 3.2.  The
 data pattern shown represents a
 binary value of 101.
-.sp3
+
+
 3-10
-.sp1
+
 at least as long as a typical Gap 3
 (in practice its length is usually
 more than 400 sync bytes, enabling it
 to serve as a Gap 3 type for Address
 Field number 0 (See Figure 3.7 for
 clarity).
-.sp3
+
+
 3-17
-.sp1
+
 page.*
-.sp1
+
 diagrammed in Figure 3.21.*
-.sp1
+
 *Figures 3.20 and 3.21 present the
 nibblizing process used by the "6 and
 2" encoding technique.  However, the
 concept is the same for the "5 and 3"
 technique.
-.sp3
+
+
 4-17
-.sp1
-.nf
+
 occurred. Either a bad checksum was detected on the data in a
-.fi
-.sp1
+
 program given there will read any
 track/sector on an unprotected
 diskette into memory, allowing the
@@ -53,67 +51,68 @@ diskette.  Using such a program is
 very important when learning about
 diskette formats and when fixing
 clobbered data.
-.sp3
+
+
 5-2
-.sp1
+
 The file manager, occupying about
 2.8K, is a collection of
-.bp
+
 5-5     (note correction to correction - first $3F2 is ok)
-.sp1
-.nf
+
       change $3F2 to handle your own RESETs, EOR (exclusive
       OR) the new value at $3F3 with a $A5 and store the
       result in the power-up byte.
-.sp3
-.fi
+
+
 6-5
-.sp1
+
 NOTE: RWTS uses zero-page location
 $48, which is also used by the
 APPLE
 monitor to hold the P-register value.
 Location $48 should be set to zero
 after each call to RWTS.
-.sp3
+
+
 6-11
-.sp1
-.nf
+
              04/05 - Byte offset of current file position*
-.sp1
-.fi
+
 *The current file position is updated
 to point to the byte following the
 data read or written.
-.sp3
+
+
 8-5
-.sp1
-.nf
+
 9E51-9E7F An image of the DOS page 3 jump vector which the
           above routine copies to $3D0-$3FF. See Chapter 5 for
           a description of its contents.
-.sp3
+
+
 8-36
-.sp1
+
 B9A0-B9FF SEEKABS routine.
           Move disk arm to desired track.
           Calls arm move delay subroutine ($BA00).
-.sp3
+
+
 8-37
-.sp1
+
 BA00-BA10 Arm move delay subroutine.
-.sp3
+
+
 A-3
-.sp1
-.fi
+
 A diskette containing these five
 programs is available at a reasonable
 cost directly from Quality Software,
 6660 Reseda Blvd., Reseda, CA. or
 telephone (213) 344-6599.
-.bp
+
 A-12
-.sp1
+
 at location $03 (the volume number
 should match the volume number of the
 other tracks), and then begin
@@ -124,9 +123,8 @@ some reason (eg.  physical damage or
 problems with the disk drive itself)
 a return code is printed.  For
 example:
-.sp3
+
+
 A-20
-.sp1
-.nf
+
 800G                    (Run the COPY program)
-.br