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Document more obsolete syntax (#1618)

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Rangi
2025-01-18 23:50:20 -05:00
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@@ -15,7 +15,7 @@ assembly language over its decades of evolution, along with their modern alterna
Its goal is to be a reference for backwards incompatibility, when upgrading an old assembly codebase to work with the latest RGBDS release.
It does
.Em not
attempt to list syntax bugs that were fixed, nor new reserved keywords that may conflict with old identifiers.
attempt to list every syntax bug that was ever fixed (with some notable exceptions), nor new reserved keywords that may conflict with old identifiers.
.Sh REMOVED
These are features which have been completely removed, without any direct alternatives.
Usually these features were limiting the addition of other features, or had awkward limits on their own intended effects.
@@ -288,7 +288,7 @@ Deprecated in 0.3.0, removed in 0.4.0.
.Pp
Instead, use
.Ql LD HL, SP + e8 .
.Ss LDHL, SP, e8
.Ss LDHL SP, e8
Supported in ASMotor, removed in RGBDS.
.Pp
Instead, use
@@ -360,6 +360,68 @@ Previously we had
.Pp
Instead, now we have
.Ql p ** q ** r == p ** (q ** r) .
.Sh BUGS
These are misfeatures that may have been possible by mistake.
They do not get deprecated, just fixed.
.Ss Space between exported labels' colons
Fixed in 0.7.0.
.Pp
Labels with two colons used to ignore a space between them; for example,
.Ql Label:\ : .
.Pp
Instead, use
.Ql Label:: .
.Ss Space between label and colon
Fixed in 0.9.0.
.Pp
Space between a label and its colon(s) used to be ignored; for example,
.Ql Label\ :
and
.Ql Label\ :: .
Now they are treated as invocations of the
.Ql Label
macro with
.Ql \&:
and
.Ql ::
as arguments.
.Pp
Instead, use
.Ql Label:
and
.Ql Label:: .
.Ss ADD r16 with implicit first HL operand
Fixed in 0.5.0.
.Pp
For example,
.Ql ADD BC
used to be treated as
.Ql ADD HL, BC ,
and likewise for
.Ql DE ,
.Ql HL ,
and
.Ql SP .
.Pp
Instead, use an explicit first
.Ql HL
operand.
.Ss = instead of SET
Fixed in 0.4.0.
.Pp
The
.Ic =
operator used to be an alias for the
.Ic SET
keyword, which included using
.Ic =
for the
.Ic SET
.Em instruction .
.Pp
Instead, just use
.Ic SET
for the instruction.
.Sh SEE ALSO
.Xr rgbasm 1 ,
.Xr gbz80 7 ,