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Warning: preg_match_all(): Compilation failed: group name must start with a non-digit at offset 4 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 700

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Warning: preg_replace(): Compilation failed: group name must start with a non-digit at offset 4 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 705

Warning: preg_match_all(): Compilation failed: group name must start with a non-digit at offset 4 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 700

Warning: Invalid argument supplied for foreach() in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 701

Warning: preg_replace(): Compilation failed: group name must start with a non-digit at offset 4 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 705

Warning: preg_match_all(): Compilation failed: group name must start with a non-digit at offset 4 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 700

Warning: Invalid argument supplied for foreach() in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 701

Warning: preg_replace(): Compilation failed: group name must start with a non-digit at offset 4 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 705

Warning: preg_match_all(): Compilation failed: group name must start with a non-digit at offset 4 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 700

Warning: Invalid argument supplied for foreach() in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 701

Warning: preg_replace(): Compilation failed: group name must start with a non-digit at offset 4 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 705

Warning: preg_match(): Compilation failed: group name must start with a non-digit at offset 8 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 722

Warning: preg_match(): Compilation failed: group name must start with a non-digit at offset 8 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 722

Warning: preg_match(): Compilation failed: group name must start with a non-digit at offset 8 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 722

Warning: preg_match(): Compilation failed: group name must start with a non-digit at offset 8 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 722

Warning: preg_match(): Compilation failed: group name must start with a non-digit at offset 8 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 722
SP0256 Page Prefix - Intellivision Wiki

SP0256 Page Prefix


Warning: preg_match(): Compilation failed: group name must start with a non-digit at offset 8 in /home/content/30/6867330/html/intellivision/wiki/includes/MagicWord.php on line 722
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Line 3: Line 3:
The Page Prefix register provides the upper 4 bits of the address for [[SP0256 JSR|JSR]] instructions, as well as branches initiated by an external [[SP0256 Address Load]] command.
The Page Prefix register provides the upper 4 bits of the address for [[SP0256 JSR|JSR]] instructions, as well as branches initiated by an external [[SP0256 Address Load]] command.
-
(Unsure:  Do JSRs push 12-bit or 16-bit addresses...?  I think they push 16-bit, so "[[SP0256 RTS|RTS]] always returns to the right place.  Need to check.)
+
(Unsure:  Do JSRs push 12-bit or 16-bit addresses...?  I think they push 16-bit, so [[SP0256 RTS|RTS]] always returns to the right place.  Need to check.)

Revision as of 22:40, 18 January 2005

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