Differences

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--- notes:flashcart:ezflash5 [2024/11/07 20:13] – asie
+++ notes:flashcart:ezflash5 [2024/11/07 22:50] (current) – asie
@@ Line 3: / Line 3: @@
 ===== Commands =====
-==== SRAM: Read byte (B7 01 aa aa aa 00 00 00) ====
+==== Card: Read with prefetch (B7 aa bb cc dd nn 00 00) ====
-Returns four bytes; the first byte is the read byte.
+  * First, ''B7aaaaaaaa010000'' is sent - returns 4 bytes. The final byte may be ''FF'' or ''00'' - if it's ''00'', prefetch is complete.
+  * Next, if prefetch was not complete, ''B7aaaaaaaa020000'' is sent repeatedly - returns 4 bytes, same format as above.
+  * Then, ''B7aaaaaaaa000000'' is issued as normal.
-==== ?? (B8 F2 00 00 nn 00 00 00) ====
+==== SRAM: Read words (B7 01 aa bb cc 00 00 00) ====
-- ''nn'' = 00 ~ A2 (in increments of 2)
+Returns 4 or 512 bytes (maybe more).
-==== ?? Write ASIC register ?? (B8 F4 ?? ?? ?? ?? ?? ??) ====
+==== NOR: Write byte (B8 F0 aa bb cc 00 00 dd) ====
-- ''B8,F4,01,00,55,AA,55,00''
+Writes byte ''dd'' to address ''aabbcc''.
-- ''B8,F4,02,06,55,AA,55,AA''
-- ''B8,F4,01,04,55,AA,55,00''
-These may influence the behaviour of command ''B7''.
+==== NOR: Write word (B8 F0 aa bb cc 00 ee dd) ====
-- ''B8,F4,03,03,55,AA,55,AA''
+Writes word ''ddee'' (as two bytes?) to address ''aabbcc''.
-In this mode, it appears that command ''B7'' acts differently:
+==== SRAM: Write word (B8 F2 aa bb cc 00 ee dd) ====
-- First, ''B7aaaaaaaa010000'' is sent (prefetch?) - returns 4 bytes. The final byte may be ''FF'' or ''00'' - if it's ''00'', prefetch is complete.
+Writes word ''ddee'' to address ''aabbcc''.
-- Next, if prefetch was not complete, ''B7aaaaaaaa020000'' is sent repeatedly - returns 4 bytes, same format as above.
-- Then, ''B7aaaaaaaa000000'' is issued as normal.
-It appears the cartridge runs a self-test of some kind for this?
+==== Card: ?? (B8 F4 01 nn 55 AA 55 00) ====
+==== Card: Configure save emulation (B8 F4 02 nn 55 AA 55 AA) ====
+==== Card: ?? (B8 F4 03 nn 55 AA 55 AA) ====
 ==== TF: Write data (B8 F6 Fa Fb Fc Fd 00 00) ====
@@ Line 33: / Line 35: @@
 ==== TF: Start data write (B8 F6 FF FF FF F0 00 00) ====
-''ab cd'' - bytes to write (sent as nibbles)
+  * ''ab cd'' - bytes to write (sent as nibbles)
 ==== TF: Read 512 bytes (B8 F7 00 00 00 00 00 00) ====
@@ Line 43: / Line 45: @@
 ==== TF: Read response (B8 FA nn 00 00 00 00 00) ====
-''nn'' - page to read (1-5).
+  * ''nn'' - page to read (1-5).
+==== ?? Lock ?? (B9 FF 55 AA 00 00 00 00) ====
-==== ?? Unlock ?? (B9 FF 55 AA 00 00 00 00) ====
+==== ?? Unlock ?? (B9 FF A5 5A 00 00 00 00) ====
-==== ?? Lock ?? (B9 FF A5 5A 00 00 00 00) ====
+==== Lock until reset? (B9 FF 5A A5 00 00 00 00) ====
 ===== SRAM =====
-- ''0x7DFE0'' - 1 if high-capacity TF card, 0 otherwise
+  * ''0x7DFE0'' - 1 if high-capacity TF card, 0 otherwise