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Updated discussion of assembly dialects
author lost
date Fri, 12 Jun 2009 04:54:12 +0000
parents 1009f302ac11
children aa0056ca7319
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232:1009f302ac11 233:efda73d44e1b
290 </section> 290 </section>
291 291
292 <section> 292 <section>
293 <title>Dialects</title> 293 <title>Dialects</title>
294 <para> 294 <para>
295 LWASM supports all documented MC6809 instructions as defined by Motorola. 295 LWASM supports all documented MC6809 instructions as defined by Motorola.
296 It also supports all known HD6309 instructions. There is some variation, 296 It also supports all known HD6309 instructions. While there is general
297 however, in the pneumonics used for the block transfer instructions. LWASM 297 agreement on the pneumonics for most of the 6309 instructions, there is some
298 uses TFM for all four of them as do several other assemblers. Others, such 298 variance with the block transfer instructions. TFM for all four variations
299 as CCASM, use four separate opcodes for it (compare: copy+, copy-, implode, 299 seems to have gained the most traction and, thus, this is the form that is
300 and explode). There are advantages to both methods. However, it seems like 300 recommended for LWASM. However, it also supports COPY, COPY-, IMP, EXP,
301 TFM has the most traction and thus, this is what LWASM supports. Support 301 TFRP, TFRM, TFRS, and TFRR. It further adds COPY+ as a synomym for COPY,
302 for such variations may be added in the future. 302 IMPLODE for IMP, and EXPAND for EXP.
303 </para> 303 </para>
304
305 <para>By default, LWASM accepts 6309 instructions. However, using the
306 <parameter>--6809</parameter> parameter, you can cause it to throw errors on
307 6309 instructions instead.</para>
304 308
305 <para> 309 <para>
306 The standard addressing mode specifiers are supported. These are the 310 The standard addressing mode specifiers are supported. These are the
307 hash sign ("#") for immediate mode, the less than sign ("&lt;") for forced 311 hash sign ("#") for immediate mode, the less than sign ("&lt;") for forced
308 eight bit modes, and the greater than sign ("&gt;") for forced sixteen bit modes. 312 eight bit modes, and the greater than sign ("&gt;") for forced sixteen bit modes.