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1988-08-15
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6KB
Date: 12-MAY-1987 12:22:43
From: SYSKERMIT%vax1.central.lancaster.ac.uk@Cs.Ucl.AC.UK
Subject: File BBCASM.ANN
65C02 Assembler 1.50
--------------------
This version is now available, and contains some extra user facilities and bug
clearances. The main ones are:
- New command line options have been added. They are:
-Mn Switches to screen mode n before assembly starts
-W Instructs the assembler to wait after outputting an error
message until a key is pressed (actioned only if the listing
is being sent to the screen)
-G Instructs the Assembler not to pause at the end of assembly,
but restart the calling language immediately. The default
action is to pause unless the calling language is BASIC
- The command line syntax has been extended, so that options can be set in
a shorter way. Thus
*ASSEMBLE SOURCE -B6 -L2 -W
could be written as
*ASSEMBLER SOURCE -B6L2W
The "-O" flag for the object file is now optional, and the assembler will
take the second parameter of the command as the object file name *unless*
it begins with a "-". Thus
*ASSEMBLE SOURCE -OBIN
can be written
*ASSEMBLE SOURCE BIN
- If the assembler is fitted as the highest priority language, pressing
CONTROL-BREAK or powering on will enter it in CLI mode. MOS commands can
then be issued to change to another language if required.
- A new service command *MODE n allows you to change screen mode to n even
when in CLI mode and the BASIC MODE statement is not available.
- The assembler will exit to the language ROM that called it, rather than
restarting BASIC.
- Bugs in the initialisation code have been cleared so the assembler can now
be started from any language, and will start reliably on second processors
- Control keys can be used to direct assembly actions while the assembly is
under way. They are:
f0..f3 Force list level to change to 0..3 . After pressing one of
these keys, LST directives are processed but not actioned.
CONTROL-L resets the list level to that set by the last
LST directive encountered.
CTRL-Q Outputs a report showing the number of the next line to be
processed
CTRL-W Reverses the current wait-after-error action
CTRL-P Reverses the current state of the list-to-printer option
CTRL-N Turns paged scroll mode on
CTRL-O Turns paged scroll mode off
CTRL-H Displays help information about key usage
SPACE Pauses assembly until a key is pressed
- Tab handling in the listing is extended, so that they are set at every 8
character positions in the operand and comment fields.
- A new directive SYSCLI allows MOS commands to be issued from the source
during assembly.
- The strings output by DISP and similar directives can include |M or |J
to start a new line, or |G to ring the bell.
- New directives CASC and CSTR plant "counted strings". They are similar to
ASC and STR, but precede the string itself with a byte giving the length of
the string. (On version 1.32 the ALEN directive could be used in a macro
to do this, but control-characters and those with B7 set, selected as
|X and ^X, would be counted as 2, rather than 1, character)
- For symmetry, extra data planting directives have been added, so that
DFB and DB plant bytes
DFDB and DDB plant low-high words
DFW and DW plant high-low words
DFS and DS reserve space
- A new directive DEFPARS allows defaults to be specified for macro
parameters.
- *HELP ASSEMBLER gives information on command usage.
- The opcode mnemonic CLR has been added as a synonym of STZ, for
compatibility with the mnemonics in the Basic assembler.
- The character "\" can now be used to flag the start of comment
- Hexadecimal constants can be begun with a "&" character (in fact, they
always could - the 1.32 User Guide was wrong!)
- Error reporting has been enhanced, so that where appropriate the message
will indicate the position in the line the error occurred.
- Screen output in mode 0 now correctly uses a width of 80 bytes, rather than
40.
- Saved Wordwise files can be input directly as source, providing they
contain no embedded commands. The Wordwise TAB character (shown as a right-
arrow on screen) is accepted as a "real" TAB.
Full details of the Assembler are contained in the User Guide, which has been
expanded with much greater descriptive detail.
----------------------------------------------
From: SYSKERMIT@UK.AC.LANCS.VAX1 "UK Kermit Distribution"
Date: 24-FEB-1987 09:32
Subj: Update to Lancaster 65C02 Assembler
Version 1.52 of the Lancaster 65C02 Assembler is now available. This is a bug-
fix release, and contains no extra user facilities. Problems fixed are:
- Immediate operands can be negative numbers. Thus expressions such as
LDA #-1
now work, planting, in this case, A9 FF as you would expect. The expression
will still be rejected if loss of the most significant byte would cause a
change of sign.
- The 65C02-only mnemonics INA and DEA now produce the correct opcodes (Note
that this problem was already fixed in versiin 1.5T as broadcast by BBC
Telesoftware)
- An EXEC file can be used to provide the replies to the QUERY directive. In
1.50 the replies were taken as keypresses and were ignored.
- The symbol table listing is not corrupted if SPACE is pressed while it is
being generated
- JSR to a zero-page address is correctly assembled. In 1.50 it was treated as
an invalid addressing mode.
- DS with an operand of zero now leaves a zero-length gap rather than a 64K
gap
- Repeat counts > 255 in DFB, etc, now work correctly