Differences

This shows you the differences between two versions of the page.

--- sidaster_patch_data [2011/10/28 13:02] – wadmin
+++ sidaster_patch_data [2018/08/26 09:36] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-==== SIDaster Patch Data ====
+==== SIDaster ROM and Patch Data ====
+//Warning : This section is not implemented in Beta 3 release of the synth. It has been added to the Wiki as a specification, in order to help the coding process of the next beta release. Expect it to be included in the final release of the SIDaster.//
-This section describes how patch Data is encoded, and stored in ROM.
+This section describes how patch Data is used and stored in ROM.
-=== SIDaster ROM memory mapping
+=== Saving and retreiving Patches ===
+The lower Keyboard Keys are used for configuration purpose. While the "Function" Key is pressed, an action on the keys below will have the corresponding action performed.
+e.g. : While the "Function" key is held, pressing C0 and then D0 will load the Preset #2.
-=== ROM Memory Header ===
+^Note^Name^Description^
+|C0|Read|Enters Read mode|
+|C#0|P1|Selects Patch 1|
+|D0|P2|Selects Patch 2|
+|Eb0|P3|Selects Patch 3|
+|E0|P4|Selects Patch 4|
+|F0|P5|Selects Patch 5|
+|F#0|P6|Selects Patch 6|
+|G0|P7|Selects Patch 7|
+|G#0|P8|Selects Patch 8|
+|A0|Spare|Spare|
+|Bb0|Write|Enters Write mode|
+=== ROM Memory organisation ===
+^Start^Stop^Name^Comment^
+|0x00|0x0C|Header|SIDaster Synth Header|
+|0xD|0x32|Patch1| Patch #1|
+|0x32|0x57|Patch2| Patch #2|
+|0x57|0x7C|Patch3| Patch #3|
+|0x7C|0xA1|Patch4| Patch #4|
+|0xA1|0xC6|Patch5| Patch #5|
+|0xC6|0xEB|Patch6| Patch #6|
+|0xEB|0X110|Patch7| Patch #7|
+|0x110|0X135|Patch8| Patch #8|
-=== Patch Data Format ===
+== Header Format ==
+Used to store generic Data in the ROM. Start adress is 0x00.
+^Adress(Dec)^(Hex)^Name^Comment^
+|0|00|'S'|"SIDaster" String|
+|1|01|'I'|:::|
+|2|02|'D'|:::|
+|3|03|'a'|:::|
+|4|04|'s'|:::|
+|5|05|'t'|:::|
+|6|06|'e'|:::|
+|7|07|'r'|:::|
+|8|08|Version|Byte : the version of the SIDaster presets installed |
+|9|09|Spare 1| Spares |
+|10|0A|Spare 2|:::|
+|11|0B|Spare 3|:::|
+|12|0C|Spare 4|:::|
+== Patch Format ==
 Every [[SIDaster]] patch is a succession of 38 Bytes organised as shown below