BBC User Guide Errata UK Version
Contents
1. 9th July 1992 Support Group Application Note a Number 027 Cor l ww Issue 1 Author BBC User Guide Errata UK Version Applicable Related Hardware Application BBC B Notes Copyright Acorn Computers Limited 1992 Every effort has been made to ensure that the information in this leaflet is true and correct at the time of printing However the products described in this leaflet are subject to continuous S G development and improvements and Acorn Computers Limited reserves the right to change uppor t Gr oup its specifications at any time Acorn Computers Limited cannot accept liability for any loss Acorn Computers Limited or damage arising from the use of any information or particulars in this leaflet ACORN Acorn House ECONET and ARCHIMEDES are trademarks of Acorn Computers Limited Vision Park Histon Cambridge CB44AE Support Group Application Note No 027 Issue 1 9th July 1992 This is the current errata for the User Guide as supplied with all UK computers Page 13 Page 23 Page 32 Page 33 Page 43 Page 53 Page 61 Page 65 Page 67 Page 72 Page 74 Page 93 Page 100 Page 143 Page 152 Page 179 Page 204 Page 288 Page 327 Page 328 The range of cassette leads shown have now been deleted The FX command takes a second parameter which controls the interlace on Modes 0 6 If the second parameter is a 1 then interlace is turned on if O them it is turned off Note that the ch2. ange in interlace operation only takes place after the next MODE command Insert a after the on line 115 of the example Insert a after the on line 160 Add a after on line 230 Second paragraph Alter page 213 to page 211 Delete the space between RND and 4 in line 100 The arithmetic range extends from 170000 1 7 10438 to0 000 1 2 104 39 not as shown In the second example program there should be after each A in line 40 BASIC II ONLY At the top of the page the maximum number of significant figures is 10 and the initial value of is amp 90A Add a after H in line 40 Alter line 100 of the example to read FOR ROW 1 TO 5 3 4 down the page All non zero values are regarded as true EXCEPT integers from 1 to 1 Top of page Note that the Auto boot mechanism does not work on the cassette filing system 1 2 down the page Change page 424 to page 422 3 4 down the page the code for New Background is 157 not 137 as shown Line 10120 of the example should read MOVE X Y Last paragraph page 428 should read page 426 Note that pressing lt SHIFT gt and lt CTRL gt together holds the listing until they are released and that lt ESCAPE gt stops the listing Note that PRINT followed by a numeric argument prints that argument in hexadecimal paragraph concerning Integer Variables Integers are sent MOST significant byte first no
3. d ie 27 Nothing The codes for the UP and DOWN cursor keys should be reversed The pin numbers on the disc printer user input output 1MHz bus and Tube have been reversed eg on the Tube the top right pin is pin1 and the bottom left pin is pin34 Delete the comment that amp D00 amp DFF is for user supplied routines This area is RESERVED for the Operating System Support Group Application Note No 027 Issue 3 Support Group Application Note No 027 Issue 1 9th July 1992 The remaining errata concern the index p513 Only the corrected line will be given Abbreviations for keywords Addressing modes ASCII Error codes Error handling in the Assembler Indirection operators INKEY Printer on off Saving memory space Scroll mode UNTIL KEY in VDU PRINT in hex quotation marks apostrophe vertical bar 483 449 490 147 252 482 147 309 338 397 434 314 448 409 450 81 275 430 435 288 407 422 194 361 38 380 87 370 141 416 439 386 18 408 324 324 18 22 23 Support Group Application Note No 027 Issue 4
4. t least significant byte first as shown Support Group Application Note No 027 Issue Support Group Application Note No 027 Issue 1 9th July 1992 Page 416 Page 421 Page 423 Page 427 Page 438 Page 439 Page 453 Page 459 Page 469 70 Page 482 Page 488 Page 489 Page 490 Page 497 Page 499 Page 501 First paragraph The whole LINE after a is passed to the Operating System rather than just the rest of the statement Alter FX2 0 to read and DISABLES the RS423 receiver Alter FX2 1 to read RS423 port disables the keyboard Add FX6 0 filters NO characters In paragraph six After a FX20 1 command the line should read After a FX20 6 command paragraph beginning If on entry The net effect of X amp 00 and Y amp FF is to read the value of V into X not A as shown The second OSBYTE call shown is A amp E2 226 not amp EA 228 top paragraph The channel number is returned in A not in Y as shown OSWORD A O On exit Y is set to the length of the line EXcluding the CR if C 0 Not INcluding as shown There should be characters between the assembler statements and the comments on EVERY line Add three error codes 251 Bad Key 253 Bad String 254 Bad Command The pattern for code 36 should be inverted ie black white and white black The pattern for code 228 is upside down The comments for codes 24 and 27 should be reverse
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