Schrijver
| Info about Megarom Mapper chip needed
|
Pentarou msx novice Berichten: 26 | Geplaatst: 07 Oktober 2006, 22:35   |
Hello,
I'm searching for info about the mapper chip used in a cartridge, it's the ASCII M60002-0125 manufactured by Mitsubishi, I need to interface a 4Mb Flash to it, but the ROM already on the cartridge is just a 1 Mb one, so I need to know where are located the other address lines.
I could probably manage to find it myself by peeking some of the mapper address registers, but It's been years since I used a real MSX so I'm trying to speed things up.
Please don't assume I'm just lazy, I tryed searching this and other forums, I googled (even on JPN pages) and I found nothing useful
So please help me!
|
|
Guillian msx professional Berichten: 633 | Geplaatst: 07 Oktober 2006, 23:35   |
This info is from Kazuhiro Tsujikawa's docs.
Bn signals are the ones you need to address the whole 4Mb flash (and more if you need it)
M60002
アスキータイプ2(ASC2) 42ピンシュリンクパッケージ
+-------__-------+
1|B7 VDD|42 Bn (O):拡張メモリアドレス
2|B6 NC|41 (MA13-MA20になる:8kBモード)
3|B5 /OE|40 (MA14-MA21になる:16kBモード)
4|B4 /SLTSL|39
5|B3 /WAIT|38 /OE (O):全てのバンクへの
6|B2 /M1|37 Output Enable
7|B1 /RD|36 /OEn (O):指定バンクへの
8|B0 /WR|35 Output Enable
9|/OE0 /RESET|34 (/OE類は/SLTSL,/RDがアクティブで
10|/OE1 S2|33 ない時にはアクティブにはならない)
11|/OE2 S1|32
12|/OE3 S0|31 Sn (I):/OEnの範囲設定(後述)
13|D7 /PRE|30
14|D6 /WTE|29 SEL (I):Lで16kBモード,Hで8kBモードになる
15|D0 SEL|28
16|D5 A15|27 /WTE (I):Lでメモリーリードサイクルに1ウェイト入れる
17|D1 A11|26 Hでウェイトを付加しなくなる
18|D4 A12|25
19|D2 A13|24 /PRE (I):Lで/OEnを予測?詳細は不明
20|D3 A14|23 通常はHで使用する
21|GND CLOCK|22
+----------------+
|
|
Pentarou msx novice Berichten: 26 | Geplaatst: 08 Oktober 2006, 17:44   |
Thanks!!!
Do you have a link for the complete Tsujikawa's docs?
|
|
Guillian msx professional Berichten: 633 | Geplaatst: 08 Oktober 2006, 19:11   |
|
|
Pentarou msx novice Berichten: 26 | Geplaatst: 08 Oktober 2006, 19:50   |
Thanks!!!!!!!!!!!
|
|
|
|
|