"Tim Stark" <[email protected]> wrote:
> Thanks for back10 updates.
>
> I reviewed your source code but noticed a bug in your code. If you
> select binary mode, it was not supposed to truncate last word at G_EOF
> mark.
This is not a bug, this is (was) the intended behaviour. However, I will
regard this as a feature request. :->
Anyhow, I have done some more work, and this feature should now work.
Disk file modes are:
-A and -B -- seven bit/word as before. -A expands <lf> to <cr><lf>
when writing tapes. -B preserves trailing null characters
when reading tapes. Default is -A when reading and -B when
writing.
-C -- Core-dump format.
-I -- Industry-compatible.
Also, the -H flag will select High-density mode, but this is just a
placeholder for now, I will fix this later.
Main new thing: the new action -p will peek at the actual tape data, to
help finding out exactly what this is. Example:
> back10 -pf AP-D481A-SB_1978.tap -T e11 | head -40
record 0001 Data (25 bytes)
0000: 000101,,000004 0 4 10 0 2 0 " " ' !! $'
0001: 124641,,515463 25 32 15 33 31 1 " " '*FAILS'
0002: 414645,,000001 103 32 50 0 0 1 "C ( " 'AFE !'
0003: 017500,,210404 3 164 2 21 2 0 " t " '!] 1$$'
0004: 000001,,000002 0 0 10 0 1 0 " " ' ! "'
record 0002 MARK
record 0003 Data (175 bytes)
0000: 777777,,000042 177 177 170 0 21 0 " x " '___ B'
0001: 446353,,420000 111 116 134 40 0 0 "IN\ " 'DSKB '
0002: 000000,,000040 0 0 0 0 20 0 " " ' @'
0003: 000001,,000001 0 0 10 0 0 1 " " ' ! !'
0004: 000010,,000006 0 0 100 0 3 0 " @ " ' ( &'
0005: 654644,,110300 153 32 41 20 140 0 "k ! `" 'UFD)# '
0006: 777755,,600274 177 176 156 0 136 0 " ~n ^" '__MP"\'
0007: 000000,,000200 0 0 0 0 100 0 " @" ' " '
0010: 000000,,000000 0 0 0 0 0 0 " " ' '
0011: 000000,,000000 0 0 0 0 0 0 " " ' '
0012: 000000,,000005 0 0 0 0 2 1 " " ' %'
0013: 000000,,000000 0 0 0 0 0 0 " " ' '
... and so on. The number of words/record can be set with -n, and the
data format for each word can be selected with arguments to -P. Default
formats are halfword, 7-bit bytes, text and sixbit. There are also hex
(-Px) and instructions (-Pi) available. One can also turn off formats
with -P-7 and so on. Further on (same tape):
> back10 -pf AP-D481A-SB_1978.tap -T e11 -Pi-7 | more
[...]
record 0026 Data (2560 bytes)
0000: 000000,,000777 " " ' '_'
0001: 306040,,446353 "1B Lu" '8P@DSK' cain 1,446353
0002: 254000,,403740 "+ p" '5@ @?@' jrst 0,403740
0003: 200040,,000415 " " '0 @ $-' move 1,415
0004: 260740,,415123 ", )" '6'@AI3' pushj 17,415123
0005: 201040,,000032 " " " '0(@ :' movei 1,32
0006: 260740,,415123 ", )" '6'@AI3' pushj 17,415123
0007: 200040,,000416 " " '0 @ $.' move 1,416
0010: 260740,,415123 ", )" '6'@AI3' pushj 17,415123
0011: 554040,,000417 "[ " 'M@@ $/' hlrz 1,417
0012: 306040,,424163 "1B (9" '8P@BAS' cain 1,424163
0013: 254000,,403747 "+ s" '5@ @?G' jrst 0,403747
As before, this is very much a work in progress. Have fun.
--Johnny
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