Home » CEEFAX disks » telesoftware12.adl » 13-01-89/A\INFO
13-01-89/A\INFO
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » CEEFAX disks » telesoftware12.adl |
| Filename: | 13-01-89/A\INFO |
| Read OK: | ✔ |
| File size: | 1C1F bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
ATS vs 3.0 Release Notes
This new release of the BBC's Advanced Teletext System ROM for the Acorn
teletext adaptor has been produced in response to the demand from owners
of the Master 512 for a version that will allow them to access the IBM
programs now being broadcast. The opportunity has been taken to
incorporate a number of other improvements:
1) *DISPLAY now copes with out of order rows (as produced by *DATA now
that row 27 is transmitted immediately after the header).
2) The Error number produced by Escape has been corrected to 17
(previously this was 27).
3) *DATE has been re-coded to give the correct date during a leap year.
4) The Date and Time Osword calls (7A:21 and 7A:22) now have a Carriage
Return at the end of the parameter block, so the user no longer has
to 'POKE' this in before reading the result string.
5) The Hamming decoding command (Osword 7A:25) now returns a byte with
bits 4 and 6 set (&5n) if a single bit error has occurred. Previous
versions of the ROM had bit 6 set (&4n), although the manual says it
should be bit 4 (&1n). Programs will now be able to detect such an
error, whichever bit they look for.
6) Two new Teletext Oswords have been introduced, 7A:26 and 7A:27, to
respectively Set and Read the emulation mode (TTX or TFS). As with
all the other Teletext Oswords, the first byte in the parameter block
is the command number, ie 26 to set the emulation mode. The second
byte is either 42 for TTX emulation (whereby each row in memory is
preceded by Magazine and Row number bytes), or 40 for TFS emulation,
which don't have these bytes, and so a block of memory may be copied
directly to screen memory for display.
Terminal mode improvements:
7) When a new page number is being entered (in terminal mode), the page
grabber is forced into HOLD mode so that receipt of another copy of
the old page doesn't overwrite your partial page number entry.
8) Rolling Headers are only suppressed if the Interrupted Sequence or
Suppress Header control bits are set in the header, previously they
were also suppressed if the Inhibit Display bit was set.
9) The Reveal function in terminal mode now uses an Escape character
(&9B) to replace the Conceal code (&98) instead of &80. Held
Graphics are thus no longer disrupted.
10) Independent Data Rows (Datacast for example) are now filtered out at
a very early stage. This prevents them appearing in every seventh
row when *DATA is used, and also prevents the page buffer
overflowing, which resulted in the bottom few lines on magazine three
pages being lost. Level 2 'ghost' rows (26, 28, & 29) are also now
filtered out if 30 or less rows are requested (Osword 7A:7), and so
will no longer cause problems in Terminal and Telesoftware modes. If
these rows are required, use Osword 7A:7 to request more than 30 rows
be grabbed. (*DATA selects, and will copy up to, 48 rows.)
11) The page grabber for the NEXT page now looks for any subpage, even if
a specific subpage is selected on the currently selected page.
12) Row 24 is re-displayed after any operation that clears it, ie looking
at the Status page, issuing an OS (*) command, or Saving a page.
13) If a link is followed to a different magazine when the parallel
transmission system is in use, the OSWORD equivalent of *MAGAZINE is
issued so that the rolling header shows pages for the new magazine.
14) When deciding whether or not a received page is a duplicate copy or a
new one, the page and subpage numbers are now compared instead of the
first six lines (256 bytes), thus differentiating between subpages
with a common header (for example page 100 on BBC-1 and 711 on BBC-2)
A number of improvements have been made to the Telesoftware downloader:
15) As well as the BBC catalogue from f5, the IBM catalogue is now
available from SHIFT-f5. The selected catalogue is identified by a
"Loading BBC catalogue..." or "Loading IBM catalogue..." message.
16) IBM filenames, which can be up to eight characters long with a 3
character extension (eg DOCUMENT.TXT), are modified to suit whichever
filing system is in use. Any full-stop is replaced by a slash (/),
and the name is truncated, if necessary, to 7 characters if DFS is in
use, or 10 for all other filing systems.
It is up to the user to ensure that where two different filenames are
truncated to the same name, the first file is not overwritten by the
second. In such cases, the first file downloaded should be re-named
on the disc BEFORE attempting to download further files.
17) Osword 7A:24 (download file) need no longer be given the filename in
UPPER CASE, and the file will be saved with the case as transmitted.
18) The number of blocks received is now displayed in decimal instead of
hexadecimal.
19) If a file needs more than 80 Ceefax pages, there is not room on the
screen for all the coloured blocks, and so a simple report is given
(ie "35 out of 85 blocks received"). This now works correctly -
previously the program would crash with a "File open" error on
receipt of the second page.
20) The Telesoftware specification allows for data to be included in the
header as well as on rows 1 to 25, but the old version of ATS ignored
row zero for that purpose. This has now been implemented. The
specification also allows for the "total number of blocks" parameter
and the "end-of-block" command to be optional - they now are.
21) In 8-bit mode, if more than one file was on the same Ceefax page,
confusion could arise as all commands were obeyed regardless of which
file the commands were in, thus a re-definition in one file could
affect the others. This has now been corrected.
22) A new Run Length Coding command has been added to the Telesoftware
specification. This allows very efficient coding of data where the
same byte (or group of bytes) is repeated many times. Most IBM files
have several hundred nulls (&00) at the beginning, and so these can
now be coded in a few characters, instead of over a page that it
would otherwise take. Screen dumps are another example that can be
significantly improved. There is no difference to the final decoded
data, but less Ceefax pages are needed, so it is quicker to download.
The accompanying ROM image should be used as a replacement for your
existing ATS ROM. If you have the facilities to program your own EPROMS,
you can 'blow' the image into an EPROM then replace your current ROM with
the new one. Alternatively, you can keep the image on disc and load it
into Sideways RAM whenever required. Either way, you should ensure the
original ROM is removed from your machine. (*UNPLUG on a Master will
suffice.)
If you cannot program your own EPROM, and do not have Sideways RAM
facilities, a replacement ROM can be obtained. Please write to or
telephone BBCSoft for details.
13th January 1989
00000000 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000010 20 20 20 20 20 20 20 20 20 41 54 53 20 76 73 20 | ATS vs | 00000020 33 2e 30 20 52 65 6c 65 61 73 65 20 4e 6f 74 65 |3.0 Release Note| 00000030 73 0d 0d 54 68 69 73 20 6e 65 77 20 72 65 6c 65 |s..This new rele| 00000040 61 73 65 20 6f 66 20 74 68 65 20 42 42 43 27 73 |ase of the BBC's| 00000050 20 41 64 76 61 6e 63 65 64 20 54 65 6c 65 74 65 | Advanced Telete| 00000060 78 74 20 53 79 73 74 65 6d 20 52 4f 4d 20 66 6f |xt System ROM fo| 00000070 72 20 74 68 65 20 41 63 6f 72 6e 0d 74 65 6c 65 |r the Acorn.tele| 00000080 74 65 78 74 20 61 64 61 70 74 6f 72 20 68 61 73 |text adaptor has| 00000090 20 62 65 65 6e 20 70 72 6f 64 75 63 65 64 20 69 | been produced i| 000000a0 6e 20 72 65 73 70 6f 6e 73 65 20 74 6f 20 74 68 |n response to th| 000000b0 65 20 64 65 6d 61 6e 64 20 66 72 6f 6d 20 6f 77 |e demand from ow| 000000c0 6e 65 72 73 0d 6f 66 20 74 68 65 20 4d 61 73 74 |ners.of the Mast| 000000d0 65 72 20 35 31 32 20 66 6f 72 20 61 20 76 65 72 |er 512 for a ver| 000000e0 73 69 6f 6e 20 74 68 61 74 20 77 69 6c 6c 20 61 |sion that will a| 000000f0 6c 6c 6f 77 20 74 68 65 6d 20 74 6f 20 61 63 63 |llow them to acc| 00000100 65 73 73 20 74 68 65 20 49 42 4d 0d 70 72 6f 67 |ess the IBM.prog| 00000110 72 61 6d 73 20 6e 6f 77 20 62 65 69 6e 67 20 62 |rams now being b| 00000120 72 6f 61 64 63 61 73 74 2e 20 20 54 68 65 20 6f |roadcast. The o| 00000130 70 70 6f 72 74 75 6e 69 74 79 20 68 61 73 20 62 |pportunity has b| 00000140 65 65 6e 20 74 61 6b 65 6e 20 74 6f 0d 69 6e 63 |een taken to.inc| 00000150 6f 72 70 6f 72 61 74 65 20 61 20 6e 75 6d 62 65 |orporate a numbe| 00000160 72 20 6f 66 20 6f 74 68 65 72 20 69 6d 70 72 6f |r of other impro| 00000170 76 65 6d 65 6e 74 73 3a 0d 0d 20 31 29 20 20 2a |vements:.. 1) *| 00000180 44 49 53 50 4c 41 59 20 6e 6f 77 20 63 6f 70 65 |DISPLAY now cope| 00000190 73 20 77 69 74 68 20 6f 75 74 20 6f 66 20 6f 72 |s with out of or| 000001a0 64 65 72 20 72 6f 77 73 20 28 61 73 20 70 72 6f |der rows (as pro| 000001b0 64 75 63 65 64 20 62 79 20 2a 44 41 54 41 20 6e |duced by *DATA n| 000001c0 6f 77 0d 20 20 20 20 20 74 68 61 74 20 72 6f 77 |ow. that row| 000001d0 20 32 37 20 69 73 20 74 72 61 6e 73 6d 69 74 74 | 27 is transmitt| 000001e0 65 64 20 69 6d 6d 65 64 69 61 74 65 6c 79 20 61 |ed immediately a| 000001f0 66 74 65 72 20 74 68 65 20 68 65 61 64 65 72 29 |fter the header)| 00000200 2e 0d 0d 20 32 29 20 20 54 68 65 20 45 72 72 6f |... 2) The Erro| 00000210 72 20 6e 75 6d 62 65 72 20 70 72 6f 64 75 63 65 |r number produce| 00000220 64 20 62 79 20 45 73 63 61 70 65 20 68 61 73 20 |d by Escape has | 00000230 62 65 65 6e 20 63 6f 72 72 65 63 74 65 64 20 74 |been corrected t| 00000240 6f 20 31 37 0d 20 20 20 20 20 28 70 72 65 76 69 |o 17. (previ| 00000250 6f 75 73 6c 79 20 74 68 69 73 20 77 61 73 20 32 |ously this was 2| 00000260 37 29 2e 0d 0d 20 33 29 20 20 2a 44 41 54 45 20 |7)... 3) *DATE | 00000270 68 61 73 20 62 65 65 6e 20 72 65 2d 63 6f 64 65 |has been re-code| 00000280 64 20 74 6f 20 67 69 76 65 20 74 68 65 20 63 6f |d to give the co| 00000290 72 72 65 63 74 20 64 61 74 65 20 64 75 72 69 6e |rrect date durin| 000002a0 67 20 61 20 6c 65 61 70 20 79 65 61 72 2e 0d 0d |g a leap year...| 000002b0 20 34 29 20 20 54 68 65 20 44 61 74 65 20 61 6e | 4) The Date an| 000002c0 64 20 54 69 6d 65 20 4f 73 77 6f 72 64 20 63 61 |d Time Osword ca| 000002d0 6c 6c 73 20 28 37 41 3a 32 31 20 61 6e 64 20 37 |lls (7A:21 and 7| 000002e0 41 3a 32 32 29 20 6e 6f 77 20 68 61 76 65 20 61 |A:22) now have a| 000002f0 20 43 61 72 72 69 61 67 65 0d 20 20 20 20 20 52 | Carriage. R| 00000300 65 74 75 72 6e 20 61 74 20 74 68 65 20 65 6e 64 |eturn at the end| 00000310 20 6f 66 20 74 68 65 20 70 61 72 61 6d 65 74 65 | of the paramete| 00000320 72 20 62 6c 6f 63 6b 2c 20 20 73 6f 20 74 68 65 |r block, so the| 00000330 20 75 73 65 72 20 6e 6f 20 6c 6f 6e 67 65 72 20 | user no longer | 00000340 68 61 73 0d 20 20 20 20 20 74 6f 20 27 50 4f 4b |has. to 'POK| 00000350 45 27 20 74 68 69 73 20 69 6e 20 62 65 66 6f 72 |E' this in befor| 00000360 65 20 72 65 61 64 69 6e 67 20 74 68 65 20 72 65 |e reading the re| 00000370 73 75 6c 74 20 73 74 72 69 6e 67 2e 0d 0d 20 35 |sult string... 5| 00000380 29 20 20 54 68 65 20 48 61 6d 6d 69 6e 67 20 64 |) The Hamming d| 00000390 65 63 6f 64 69 6e 67 20 63 6f 6d 6d 61 6e 64 20 |ecoding command | 000003a0 28 4f 73 77 6f 72 64 20 37 41 3a 32 35 29 20 6e |(Osword 7A:25) n| 000003b0 6f 77 20 72 65 74 75 72 6e 73 20 61 20 62 79 74 |ow returns a byt| 000003c0 65 20 77 69 74 68 0d 20 20 20 20 20 62 69 74 73 |e with. bits| 000003d0 20 34 20 61 6e 64 20 36 20 73 65 74 20 28 26 35 | 4 and 6 set (&5| 000003e0 6e 29 20 69 66 20 61 20 73 69 6e 67 6c 65 20 62 |n) if a single b| 000003f0 69 74 20 65 72 72 6f 72 20 68 61 73 20 6f 63 63 |it error has occ| 00000400 75 72 72 65 64 2e 20 20 20 50 72 65 76 69 6f 75 |urred. Previou| 00000410 73 0d 20 20 20 20 20 76 65 72 73 69 6f 6e 73 20 |s. versions | 00000420 6f 66 20 74 68 65 20 52 4f 4d 20 68 61 64 20 62 |of the ROM had b| 00000430 69 74 20 36 20 73 65 74 20 28 26 34 6e 29 2c 20 |it 6 set (&4n), | 00000440 20 61 6c 74 68 6f 75 67 68 20 74 68 65 20 6d 61 | although the ma| 00000450 6e 75 61 6c 20 73 61 79 73 20 69 74 0d 20 20 20 |nual says it. | 00000460 20 20 73 68 6f 75 6c 64 20 62 65 20 62 69 74 20 | should be bit | 00000470 34 20 28 26 31 6e 29 2e 20 20 50 72 6f 67 72 61 |4 (&1n). Progra| 00000480 6d 73 20 77 69 6c 6c 20 6e 6f 77 20 62 65 20 61 |ms will now be a| 00000490 62 6c 65 20 74 6f 20 64 65 74 65 63 74 20 73 75 |ble to detect su| 000004a0 63 68 20 61 6e 0d 20 20 20 20 20 65 72 72 6f 72 |ch an. error| 000004b0 2c 20 77 68 69 63 68 65 76 65 72 20 62 69 74 20 |, whichever bit | 000004c0 74 68 65 79 20 6c 6f 6f 6b 20 66 6f 72 2e 0d 0d |they look for...| 000004d0 20 36 29 20 20 54 77 6f 20 6e 65 77 20 54 65 6c | 6) Two new Tel| 000004e0 65 74 65 78 74 20 4f 73 77 6f 72 64 73 20 68 61 |etext Oswords ha| 000004f0 76 65 20 62 65 65 6e 20 69 6e 74 72 6f 64 75 63 |ve been introduc| 00000500 65 64 2c 20 37 41 3a 32 36 20 61 6e 64 20 37 41 |ed, 7A:26 and 7A| 00000510 3a 32 37 2c 20 74 6f 0d 20 20 20 20 20 72 65 73 |:27, to. res| 00000520 70 65 63 74 69 76 65 6c 79 20 53 65 74 20 61 6e |pectively Set an| 00000530 64 20 52 65 61 64 20 74 68 65 20 65 6d 75 6c 61 |d Read the emula| 00000540 74 69 6f 6e 20 6d 6f 64 65 20 20 28 54 54 58 20 |tion mode (TTX | 00000550 6f 72 20 54 46 53 29 2e 20 20 41 73 20 77 69 74 |or TFS). As wit| 00000560 68 0d 20 20 20 20 20 61 6c 6c 20 74 68 65 20 6f |h. all the o| 00000570 74 68 65 72 20 54 65 6c 65 74 65 78 74 20 4f 73 |ther Teletext Os| 00000580 77 6f 72 64 73 2c 20 74 68 65 20 66 69 72 73 74 |words, the first| 00000590 20 62 79 74 65 20 69 6e 20 74 68 65 20 70 61 72 | byte in the par| 000005a0 61 6d 65 74 65 72 20 62 6c 6f 63 6b 0d 20 20 20 |ameter block. | 000005b0 20 20 69 73 20 74 68 65 20 63 6f 6d 6d 61 6e 64 | is the command| 000005c0 20 6e 75 6d 62 65 72 2c 20 69 65 20 32 36 20 74 | number, ie 26 t| 000005d0 6f 20 73 65 74 20 74 68 65 20 65 6d 75 6c 61 74 |o set the emulat| 000005e0 69 6f 6e 20 6d 6f 64 65 2e 20 20 54 68 65 20 73 |ion mode. The s| 000005f0 65 63 6f 6e 64 0d 20 20 20 20 20 62 79 74 65 20 |econd. byte | 00000600 69 73 20 65 69 74 68 65 72 20 34 32 20 66 6f 72 |is either 42 for| 00000610 20 54 54 58 20 65 6d 75 6c 61 74 69 6f 6e 20 28 | TTX emulation (| 00000620 77 68 65 72 65 62 79 20 65 61 63 68 20 72 6f 77 |whereby each row| 00000630 20 69 6e 20 6d 65 6d 6f 72 79 20 69 73 0d 20 20 | in memory is. | 00000640 20 20 20 70 72 65 63 65 64 65 64 20 62 79 20 4d | preceded by M| 00000650 61 67 61 7a 69 6e 65 20 61 6e 64 20 52 6f 77 20 |agazine and Row | 00000660 6e 75 6d 62 65 72 20 62 79 74 65 73 29 2c 20 20 |number bytes), | 00000670 6f 72 20 34 30 20 66 6f 72 20 54 46 53 20 65 6d |or 40 for TFS em| 00000680 75 6c 61 74 69 6f 6e 2c 0d 20 20 20 20 20 77 68 |ulation,. wh| 00000690 69 63 68 20 64 6f 6e 27 74 20 68 61 76 65 20 74 |ich don't have t| 000006a0 68 65 73 65 20 62 79 74 65 73 2c 20 61 6e 64 20 |hese bytes, and | 000006b0 73 6f 20 61 20 62 6c 6f 63 6b 20 6f 66 20 6d 65 |so a block of me| 000006c0 6d 6f 72 79 20 6d 61 79 20 62 65 20 63 6f 70 69 |mory may be copi| 000006d0 65 64 0d 20 20 20 20 20 64 69 72 65 63 74 6c 79 |ed. directly| 000006e0 20 74 6f 20 73 63 72 65 65 6e 20 6d 65 6d 6f 72 | to screen memor| 000006f0 79 20 66 6f 72 20 64 69 73 70 6c 61 79 2e 0d 0d |y for display...| 00000700 0d 54 65 72 6d 69 6e 61 6c 20 6d 6f 64 65 20 69 |.Terminal mode i| 00000710 6d 70 72 6f 76 65 6d 65 6e 74 73 3a 0d 0d 20 37 |mprovements:.. 7| 00000720 29 20 20 57 68 65 6e 20 61 20 6e 65 77 20 70 61 |) When a new pa| 00000730 67 65 20 6e 75 6d 62 65 72 20 69 73 20 62 65 69 |ge number is bei| 00000740 6e 67 20 65 6e 74 65 72 65 64 20 28 69 6e 20 74 |ng entered (in t| 00000750 65 72 6d 69 6e 61 6c 20 6d 6f 64 65 29 2c 20 20 |erminal mode), | 00000760 74 68 65 20 70 61 67 65 0d 20 20 20 20 20 67 72 |the page. gr| 00000770 61 62 62 65 72 20 69 73 20 66 6f 72 63 65 64 20 |abber is forced | 00000780 69 6e 74 6f 20 48 4f 4c 44 20 6d 6f 64 65 20 73 |into HOLD mode s| 00000790 6f 20 74 68 61 74 20 72 65 63 65 69 70 74 20 6f |o that receipt o| 000007a0 66 20 61 6e 6f 74 68 65 72 20 63 6f 70 79 20 6f |f another copy o| 000007b0 66 0d 20 20 20 20 20 74 68 65 20 6f 6c 64 20 70 |f. the old p| 000007c0 61 67 65 20 64 6f 65 73 6e 27 74 20 6f 76 65 72 |age doesn't over| 000007d0 77 72 69 74 65 20 79 6f 75 72 20 70 61 72 74 69 |write your parti| 000007e0 61 6c 20 70 61 67 65 20 6e 75 6d 62 65 72 20 65 |al page number e| 000007f0 6e 74 72 79 2e 0d 0d 20 38 29 20 20 52 6f 6c 6c |ntry... 8) Roll| 00000800 69 6e 67 20 48 65 61 64 65 72 73 20 61 72 65 20 |ing Headers are | 00000810 6f 6e 6c 79 20 73 75 70 70 72 65 73 73 65 64 20 |only suppressed | 00000820 69 66 20 74 68 65 20 49 6e 74 65 72 72 75 70 74 |if the Interrupt| 00000830 65 64 20 53 65 71 75 65 6e 63 65 20 6f 72 0d 20 |ed Sequence or. | 00000840 20 20 20 20 53 75 70 70 72 65 73 73 20 48 65 61 | Suppress Hea| 00000850 64 65 72 20 63 6f 6e 74 72 6f 6c 20 62 69 74 73 |der control bits| 00000860 20 61 72 65 20 73 65 74 20 69 6e 20 74 68 65 20 | are set in the | 00000870 68 65 61 64 65 72 2c 20 70 72 65 76 69 6f 75 73 |header, previous| 00000880 6c 79 20 74 68 65 79 0d 20 20 20 20 20 77 65 72 |ly they. wer| 00000890 65 20 61 6c 73 6f 20 73 75 70 70 72 65 73 73 65 |e also suppresse| 000008a0 64 20 69 66 20 74 68 65 20 49 6e 68 69 62 69 74 |d if the Inhibit| 000008b0 20 44 69 73 70 6c 61 79 20 62 69 74 20 77 61 73 | Display bit was| 000008c0 20 73 65 74 2e 0d 0d 20 39 29 20 20 54 68 65 20 | set... 9) The | 000008d0 52 65 76 65 61 6c 20 66 75 6e 63 74 69 6f 6e 20 |Reveal function | 000008e0 69 6e 20 74 65 72 6d 69 6e 61 6c 20 6d 6f 64 65 |in terminal mode| 000008f0 20 6e 6f 77 20 75 73 65 73 20 61 6e 20 45 73 63 | now uses an Esc| 00000900 61 70 65 20 63 68 61 72 61 63 74 65 72 0d 20 20 |ape character. | 00000910 20 20 20 28 26 39 42 29 20 74 6f 20 72 65 70 6c | (&9B) to repl| 00000920 61 63 65 20 74 68 65 20 43 6f 6e 63 65 61 6c 20 |ace the Conceal | 00000930 63 6f 64 65 20 28 26 39 38 29 20 69 6e 73 74 65 |code (&98) inste| 00000940 61 64 20 6f 66 20 26 38 30 2e 20 20 48 65 6c 64 |ad of &80. Held| 00000950 0d 20 20 20 20 20 47 72 61 70 68 69 63 73 20 61 |. Graphics a| 00000960 72 65 20 74 68 75 73 20 6e 6f 20 6c 6f 6e 67 65 |re thus no longe| 00000970 72 20 64 69 73 72 75 70 74 65 64 2e 0d 0d 31 30 |r disrupted...10| 00000980 29 20 20 49 6e 64 65 70 65 6e 64 65 6e 74 20 44 |) Independent D| 00000990 61 74 61 20 52 6f 77 73 20 28 44 61 74 61 63 61 |ata Rows (Dataca| 000009a0 73 74 20 66 6f 72 20 65 78 61 6d 70 6c 65 29 20 |st for example) | 000009b0 61 72 65 20 6e 6f 77 20 66 69 6c 74 65 72 65 64 |are now filtered| 000009c0 20 6f 75 74 20 61 74 0d 20 20 20 20 20 61 20 76 | out at. a v| 000009d0 65 72 79 20 65 61 72 6c 79 20 73 74 61 67 65 2e |ery early stage.| 000009e0 20 20 54 68 69 73 20 70 72 65 76 65 6e 74 73 20 | This prevents | 000009f0 74 68 65 6d 20 61 70 70 65 61 72 69 6e 67 20 69 |them appearing i| 00000a00 6e 20 65 76 65 72 79 20 73 65 76 65 6e 74 68 0d |n every seventh.| 00000a10 20 20 20 20 20 72 6f 77 20 77 68 65 6e 20 2a 44 | row when *D| 00000a20 41 54 41 20 69 73 20 75 73 65 64 2c 20 61 6e 64 |ATA is used, and| 00000a30 20 61 6c 73 6f 20 70 72 65 76 65 6e 74 73 20 74 | also prevents t| 00000a40 68 65 20 70 61 67 65 20 62 75 66 66 65 72 0d 20 |he page buffer. | 00000a50 20 20 20 20 6f 76 65 72 66 6c 6f 77 69 6e 67 2c | overflowing,| 00000a60 20 77 68 69 63 68 20 72 65 73 75 6c 74 65 64 20 | which resulted | 00000a70 69 6e 20 74 68 65 20 62 6f 74 74 6f 6d 20 66 65 |in the bottom fe| 00000a80 77 20 6c 69 6e 65 73 20 6f 6e 20 6d 61 67 61 7a |w lines on magaz| 00000a90 69 6e 65 20 74 68 72 65 65 0d 20 20 20 20 20 70 |ine three. p| 00000aa0 61 67 65 73 20 62 65 69 6e 67 20 6c 6f 73 74 2e |ages being lost.| 00000ab0 20 20 4c 65 76 65 6c 20 32 20 27 67 68 6f 73 74 | Level 2 'ghost| 00000ac0 27 20 72 6f 77 73 20 20 28 32 36 2c 20 32 38 2c |' rows (26, 28,| 00000ad0 20 26 20 32 39 29 20 20 61 72 65 20 61 6c 73 6f | & 29) are also| 00000ae0 20 6e 6f 77 0d 20 20 20 20 20 66 69 6c 74 65 72 | now. filter| 00000af0 65 64 20 6f 75 74 20 69 66 20 33 30 20 6f 72 20 |ed out if 30 or | 00000b00 6c 65 73 73 20 72 6f 77 73 20 61 72 65 20 72 65 |less rows are re| 00000b10 71 75 65 73 74 65 64 20 28 4f 73 77 6f 72 64 20 |quested (Osword | 00000b20 37 41 3a 37 29 2c 20 61 6e 64 20 73 6f 0d 20 20 |7A:7), and so. | 00000b30 20 20 20 77 69 6c 6c 20 6e 6f 20 6c 6f 6e 67 65 | will no longe| 00000b40 72 20 63 61 75 73 65 20 70 72 6f 62 6c 65 6d 73 |r cause problems| 00000b50 20 69 6e 20 54 65 72 6d 69 6e 61 6c 20 61 6e 64 | in Terminal and| 00000b60 20 54 65 6c 65 73 6f 66 74 77 61 72 65 20 6d 6f | Telesoftware mo| 00000b70 64 65 73 2e 20 20 49 66 0d 20 20 20 20 20 74 68 |des. If. th| 00000b80 65 73 65 20 72 6f 77 73 20 61 72 65 20 72 65 71 |ese rows are req| 00000b90 75 69 72 65 64 2c 20 75 73 65 20 4f 73 77 6f 72 |uired, use Oswor| 00000ba0 64 20 37 41 3a 37 20 74 6f 20 72 65 71 75 65 73 |d 7A:7 to reques| 00000bb0 74 20 6d 6f 72 65 20 74 68 61 6e 20 33 30 20 72 |t more than 30 r| 00000bc0 6f 77 73 0d 20 20 20 20 20 62 65 20 67 72 61 62 |ows. be grab| 00000bd0 62 65 64 2e 20 20 28 2a 44 41 54 41 20 73 65 6c |bed. 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If you | 00001a10 68 61 76 65 20 74 68 65 20 66 61 63 69 6c 69 74 |have the facilit| 00001a20 69 65 73 20 74 6f 20 70 72 6f 67 72 61 6d 20 79 |ies to program y| 00001a30 6f 75 72 20 6f 77 6e 20 45 50 52 4f 4d 53 2c 0d |our own EPROMS,.| 00001a40 79 6f 75 20 63 61 6e 20 27 62 6c 6f 77 27 20 74 |you can 'blow' t| 00001a50 68 65 20 69 6d 61 67 65 20 69 6e 74 6f 20 61 6e |he image into an| 00001a60 20 45 50 52 4f 4d 20 74 68 65 6e 20 72 65 70 6c | EPROM then repl| 00001a70 61 63 65 20 79 6f 75 72 20 63 75 72 72 65 6e 74 |ace your current| 00001a80 20 52 4f 4d 20 77 69 74 68 0d 74 68 65 20 6e 65 | ROM with.the ne| 00001a90 77 20 6f 6e 65 2e 20 41 6c 74 65 72 6e 61 74 69 |w one. Alternati| 00001aa0 76 65 6c 79 2c 20 79 6f 75 20 63 61 6e 20 6b 65 |vely, you can ke| 00001ab0 65 70 20 74 68 65 20 69 6d 61 67 65 20 6f 6e 20 |ep the image on | 00001ac0 64 69 73 63 20 61 6e 64 20 6c 6f 61 64 20 69 74 |disc and load it| 00001ad0 0d 69 6e 74 6f 20 53 69 64 65 77 61 79 73 20 52 |.into Sideways R| 00001ae0 41 4d 20 77 68 65 6e 65 76 65 72 20 72 65 71 75 |AM whenever requ| 00001af0 69 72 65 64 2e 20 45 69 74 68 65 72 20 77 61 79 |ired. Either way| 00001b00 2c 20 79 6f 75 20 73 68 6f 75 6c 64 20 65 6e 73 |, you should ens| 00001b10 75 72 65 20 74 68 65 0d 6f 72 69 67 69 6e 61 6c |ure the.original| 00001b20 20 52 4f 4d 20 69 73 20 72 65 6d 6f 76 65 64 20 | ROM is removed | 00001b30 66 72 6f 6d 20 79 6f 75 72 20 6d 61 63 68 69 6e |from your machin| 00001b40 65 2e 20 28 2a 55 4e 50 4c 55 47 20 6f 6e 20 61 |e. (*UNPLUG on a| 00001b50 20 4d 61 73 74 65 72 20 77 69 6c 6c 0d 73 75 66 | Master will.suf| 00001b60 66 69 63 65 2e 29 0d 0d 49 66 20 79 6f 75 20 63 |fice.)..If you c| 00001b70 61 6e 6e 6f 74 20 70 72 6f 67 72 61 6d 20 79 6f |annot program yo| 00001b80 75 72 20 6f 77 6e 20 45 50 52 4f 4d 2c 20 61 6e |ur own EPROM, an| 00001b90 64 20 64 6f 20 6e 6f 74 20 68 61 76 65 20 53 69 |d do not have Si| 00001ba0 64 65 77 61 79 73 20 52 41 4d 0d 66 61 63 69 6c |deways RAM.facil| 00001bb0 69 74 69 65 73 2c 20 61 20 72 65 70 6c 61 63 65 |ities, a replace| 00001bc0 6d 65 6e 74 20 52 4f 4d 20 63 61 6e 20 62 65 20 |ment ROM can be | 00001bd0 6f 62 74 61 69 6e 65 64 2e 20 50 6c 65 61 73 65 |obtained. Please| 00001be0 20 77 72 69 74 65 20 74 6f 20 6f 72 0d 74 65 6c | write to or.tel| 00001bf0 65 70 68 6f 6e 65 20 42 42 43 53 6f 66 74 20 66 |ephone BBCSoft f| 00001c00 6f 72 20 64 65 74 61 69 6c 73 2e 0d 0d 31 33 74 |or details...13t| 00001c10 68 20 4a 61 6e 75 61 72 79 20 31 39 38 39 0d |h January 1989.| 00001c1f
13-01-89/A\INFO.m0
13-01-89/A\INFO.m1
13-01-89/A\INFO.m2
13-01-89/A\INFO.m4
13-01-89/A\INFO.m5
.