NEO mapper/Extension2 - Revision history

Aoineko: Replaced content with "#REDICT NEO mapper/Extension"

2026-11-01T00:06:29Z

Replaced content with "#REDICT NEO mapper/Extension"

2026-11-01T00:05:17Z

‎Appendix

2026-11-01T00:02:51Z

‎Programmable processor and emulation

2026-11-01T00:01:17Z

‎Version

2026-11-01T00:00:05Z

‎0x08: SCC/SCC+

2026-10-31T23:59:34Z

‎0x08: SCC/SCC+

2026-10-31T23:53:09Z

‎0x06: SRAM/FRAM

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‎0x04: RAM

2026-10-31T23:52:42Z

‎0x04: RAM

2026-10-31T23:52:16Z

‎0x06: SRAM/FRAM

@@ Line 439: / Line 439: @@
 	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+	{
-x13, // NEO mapper version 1.3
+x13, // F0:  NEO mapper version 1.3
-, // Info
+,    // F1:  Info
-,
+,    // F2:
-,	// RAM
+,    // F3:
-, // SRAM/FRAM
+,   // F4:  RAM
-,
+,    // F5:
-,
+,   // F6: SRAM/FRAM
-, // SCC
+,    // F7:
-,
+,    // F8: SCC
-,
+,    // F9: SP-OPL4
-,
+,    // F10:
-,
+,    // F11:
-,
+,    // F12:
-,
+,    // F13:
-,
+,    // F14:
-,
+,    // F15:
 	},
 };

@@ Line 426: / Line 426: @@
+{
 	char	Sign[3];
 	uint8	Flag;
 	uint16	SegmentNum;
-	uint8	_reserved2[8];
+	uint8	_reserved[10];
 	uint8	Functions[FUNC_NUM]; // Must be different from 0 for supported functions
 };
@@ Line 437: / Line 435: @@
+{
 	{ 'N', 'E', 'O' },
 x01, // NEO-16
 	ROM_SEG_NUM, // 1204 segments (16 MB)
-	{ 0, 0, 0, 0, 0, 0, 0, 0 },
+	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+	{
-, // Mapper
+x13, // NEO mapper version 1.3
 , // Info
 ,

@@ Line 278: / Line 278: @@
    xor   a
    ld    (0x4201),a ; Select Information function in bank 2
-   ld    a,(0x8003) ; Read version
+   ld    a,(0x8010) ; Read version at offset 16
    ld    hl,0x4200
    ld    (hl),0     ; Restore NEO mapper function in bank 2

@@ Line 218: / Line 218: @@
 Any bank number is valid, but bank #4 is recommended for NEO-8 and #2 for NEO-16 so the SCC can be accessed through the standard memory area from 0x9800 to 0x9FFF.
-<u>Parameter</u>:
+<u>Parameter</u>: The chip version to activate
 {| class="wikitable"
 ! 7 || 6 || 5 || 4 || 3 || 2 || 1 || 0

@@ Line 213: / Line 213: @@
 ==== 0x08: SCC/SCC+ ====
-Activate SCC to be accessed through memory area from 9800h to 9FFFh (4 KB mirrored)
+Activate access to SCC audio chip through the given bank.
-Any bank number is valid, but bank #4 is recommanded for NEO-8 and #2 for NEO-16 to use standard address for
+Once enabled, access to the bank works the same way as on an SCC cartridge.
 {| class="wikitable"
 ! 7 || 6 || 5 || 4 || 3 || 2 || 1 || 0
@@ Line 229: / Line 232: @@
 |}
 * C: 0=SCC, 1=SCC+
 ==== 0x09: SP-OPL4 ====

@@ Line 192: / Line 192: @@
 Activate read/write access to SRAM/FRAM through the given bank (8 KB mirrored on NEO-16)
-<u>Parameter</u>: The slot to select in the given bank
+<u>Parameter</u>:
 {| class="wikitable"
 ! 7 || 6 || 5 || 4 || 3 || 2 || 1 || 0
@@ Line 200: / Line 200: @@
 |style="background-color:#BBB;"| 0
 |style="background-color:#BBB;"| 0
-|style="background-color:#AAF;" colspan="4"| Segment
+|style="background-color:#AAF;" colspan="4"| Slot
 |}
 Maximum size: 16 x 8 KB = 128 KB