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Difference between revisions of "AGI/Specifications/Resources"
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AGI/Specifications/Resources (view source)
Revision as of 21:58, 30 November 2011
, 21:58, 30 November 2011→How the interpreter handles the code: -- fix syntax highlighting
(→Logic resource format: -- Table wikification) |
(→How the interpreter handles the code: -- fix syntax highlighting) |
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<span id="test-commands"></span> | <span id="test-commands"></span> | ||
{| border="1" | {| border="1" cellspacing="0" cellpadding="5" | ||
|+ '''Table 6-1: Test commands''' | |+ '''Table 6-1: Test commands''' | ||
|- | |- | ||
| Line 229: | Line 229: | ||
<span id="action-commands"></span> | <span id="action-commands"></span> | ||
{| border="1" | {| border="1" cellspacing="0" cellpadding="5" | ||
|+ '''Table 6-2: Action Commands''' | |+ '''Table 6-2: Action Commands''' | ||
|- | |- | ||
| Line 2,267: | Line 2,267: | ||
discussed at a later stage. | discussed at a later stage. | ||
{| border="1" | {| border="1" cellspacing="0" cellpadding="5" | ||
|- | |- | ||
! Offset | ! Offset | ||
| Line 2,301: | Line 2,301: | ||
between one and seven arguments inclusive. This is discussed later on. | between one and seven arguments inclusive. This is discussed later on. | ||
The first set of codes is the AGI commands themselves listed in | The first set of codes is the AGI commands themselves listed in | ||
[[AGI/Specifications/Resources#action-commands| Table 6-2]], and they have the range 0x00--0xB6. | |||
The second set of codes is as follows: | The second set of codes is as follows: | ||
{| border="1" | {| border="1" cellspacing="0" cellpadding="5" | ||
! Code | ! Code | ||
! Command | ! Command | ||
| Line 2,343: | Line 2,342: | ||
which tests whether flag number 5 is set. The 0xFF effectively switches | which tests whether flag number 5 is set. The 0xFF effectively switches | ||
the interpreter into a condition checking mode which leads us to the | the interpreter into a condition checking mode which leads us to the | ||
set of codes listed in | set of codes listed in [[AGI/Specifications/Resources#test-commands| Table 6-1]] | ||
0x00 - 0x12 Condition codes. | 0x00 - 0x12 Condition codes. | ||
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follows: | follows: | ||
{| border="1" | {| border="1" cellspacing="0" cellpadding="5" | ||
|- | |- | ||
! Offset | ! Offset | ||
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The format of the message section is as follows: | The format of the message section is as follows: | ||
{| border="1" | {| border="1" cellspacing="0" cellpadding="5" | ||
|- | |- | ||
! Offset | ! Offset | ||
| Line 2,526: | Line 2,525: | ||
Example: MH2, equaln. | Example: MH2, equaln. | ||
<syntax type="ASM | <syntax type="ASM"> | ||
;equaln (eg. if (work = 3) ) | ;equaln (eg. if (work = 3) ) | ||
0D71 AC LODSB ;get variable number | 0D71 AC LODSB ;get variable number | ||
| Line 2,541: | Line 2,540: | ||
Example: MH2, equalv. | Example: MH2, equalv. | ||
<syntax type="ASM | <syntax type="ASM"> | ||
;equalv (eg. if (work = maxwork) ) | ;equalv (eg. if (work = maxwork) ) | ||
0D82 AC LODSB ;get first var number | 0D82 AC LODSB ;get first var number | ||
| Line 2,569: | Line 2,568: | ||
on, I'll explain the interpretation in steps after the code block. | on, I'll explain the interpretation in steps after the code block. | ||
<syntax type="ASM | <syntax type="ASM"> | ||
;Decoding a LOGIC file. | ;Decoding a LOGIC file. | ||
1E6C:2EF2 56 PUSH SI | 1E6C:2EF2 56 PUSH SI | ||
| Line 2,694: | Line 2,693: | ||
treating each test separately and calling the relevant test command | treating each test separately and calling the relevant test command | ||
routines using the jump table in the <tt>agidata.ovl</tt> file. | routines using the jump table in the <tt>agidata.ovl</tt> file. | ||
Each test command routine will return a value in < | Each test command routine will return a value in <tt>AL</tt> which | ||
says whether it is true or not. Depending on the NOTs and ORs, the | says whether it is true or not. Depending on the NOTs and ORs, the | ||
whole expression is evaluated. If at any stage during the evaluation | whole expression is evaluated. If at any stage during the evaluation | ||