ZXI standard: Difference between revisions

ZXI standard (view source)

459 bytes added , 10 November 2011

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 To have your device certified as ZXI compliant, you must apply for the required number of I/O ports in the range #hh3B. This can be done by posting a request to usenet's comp.sys.sinclair. An informal advisory committee will aim to assist you in choosing the appropriate ports in a timely fashion.
-The following ports have been allocated:
+The ports are assigned as follows
 <pre>
-#FF3B - ULAplus data
+#xF3B - ULAplus (see below)
-#BF3B - ULAplus register
 #xE3B - ZX Prism
+#xD3B - ZXI Hard Disk Interface Specification (working title)
+#xC3B - Unassigned
 #xB3B - Development/Testing. These ports should only be used during device development.
-#053B - Reserved
+#xA3B - Unassigned
-#043B - Reserved
+#x93B - Unassigned
+#x83B - Unassigned
+#x73B - Unassigned
+#x63B - Unassigned
+#x53B - Unassigned
+#x43B - Unassigned
+#x03B, #x13B, #x23B, and #x33B are to be used in groups where a device needs four ports (for example Spectranet which has the 0x3B assignments)
+</pre>
+Currently Allocated #x03B, #x13B, #x23B, and #x33B Ports
+<pre>
 #033B - Spectranet page A memory select
 #023B - Spectranet page B memory select
 #013B - Spectranet programmable trap register
 #003B - Spectranet control register
+</pre>
+Currently used ULAplus ports
+<pre>
+#FF3B - ULAplus data
+#BF3B - ULAplus register
 </pre>