https://wikiti.brandonw.net/api.php?action=feedcontributions&feedformat=atom&user=68.41.6.124WikiTI - User contributions [en]2026-04-05T20:19:54ZUser contributionsMediaWiki 1.23.5https://wikiti.brandonw.net/index.php?title=83Plus:OS:RST_Routines83Plus:OS:RST Routines2005-06-03T04:30:04Z<p>68.41.6.124: /* Remarks */</p>
<hr />
<div>[[Category:83Plus:OS_Information|RST Routines]]<br />
== Introduction ==<br />
<br />
The Z80 restart instruction, or <code>RST</code>, can be used instead of a B_CALL for some system entry points. The advantage is that using the RST instruction takes only one byte, instead of the three bytes required for a B_CALL, and is very quick when compared with the relatively large overhead inherent of a B_CALL.<br />
<br />
== RST Routines ==<br />
All the RST routines work exactly the same as the corresponding B_CALLs:<br />
{| border="0"<br />
| '''B_CALL''' || '''RST'''<br />
|-[[83Plus:BCALLs:412F|OP1ToOP2]] || rOP1ToOP2<br />
|-<br />
|[[83Plus:BCALLs:42F1|FindSym]] || rFindSym<br />
|-<br />
|[[83Plus:BCALLs:43BA|PushRealO1]] || rPushRealO1<br />
|-<br />
|[[83Plus:BCALLs:417A|Mov9ToOP1]] || rMov9ToOP1<br />
|-<br />
|[[83Plus:BCALLs:4072|FPAdd]] || rFPAdd<br />
|}<br />
== Example ==<br />
<br />
<nowiki>rst rFPAdd</nowiki><br />
<br />
== Equates ==<br />
<br />
<nowiki><br />
rOP1ToOP2 EQU 08h<br />
rFindSym EQU 10h<br />
rPushRealO1 EQU 18h<br />
rMov9ToOP1 EQU 20h<br />
rFPAdd EQU 30h<br />
</nowiki><br />
<br />
== Remarks ==<br />
<br />
You cannot define your own RSTs; they are part of the operating system.<br />
<nowiki>rst 00 is the OS reset<br />
rst 28h is BCALL<br />
rst 38h is the interrupt routine</nowiki></div>68.41.6.124https://wikiti.brandonw.net/index.php?title=83Plus:OS:RST_Routines83Plus:OS:RST Routines2005-06-03T04:29:48Z<p>68.41.6.124: /* Remarks */</p>
<hr />
<div>[[Category:83Plus:OS_Information|RST Routines]]<br />
== Introduction ==<br />
<br />
The Z80 restart instruction, or <code>RST</code>, can be used instead of a B_CALL for some system entry points. The advantage is that using the RST instruction takes only one byte, instead of the three bytes required for a B_CALL, and is very quick when compared with the relatively large overhead inherent of a B_CALL.<br />
<br />
== RST Routines ==<br />
All the RST routines work exactly the same as the corresponding B_CALLs:<br />
{| border="0"<br />
| '''B_CALL''' || '''RST'''<br />
|-[[83Plus:BCALLs:412F|OP1ToOP2]] || rOP1ToOP2<br />
|-<br />
|[[83Plus:BCALLs:42F1|FindSym]] || rFindSym<br />
|-<br />
|[[83Plus:BCALLs:43BA|PushRealO1]] || rPushRealO1<br />
|-<br />
|[[83Plus:BCALLs:417A|Mov9ToOP1]] || rMov9ToOP1<br />
|-<br />
|[[83Plus:BCALLs:4072|FPAdd]] || rFPAdd<br />
|}<br />
== Example ==<br />
<br />
<nowiki>rst rFPAdd</nowiki><br />
<br />
== Equates ==<br />
<br />
<nowiki><br />
rOP1ToOP2 EQU 08h<br />
rFindSym EQU 10h<br />
rPushRealO1 EQU 18h<br />
rMov9ToOP1 EQU 20h<br />
rFPAdd EQU 30h<br />
</nowiki><br />
<br />
== Remarks ==<br />
<br />
You cannot define your own RSTs; they are part of the operating system.<br />
rst 00 is the OS reset<br />
rst 28h is BCALL<br />
rst 38h is the interrupt routine</div>68.41.6.124