315-5339
Posted: Sat Jan 28, 2012 8:58 am
Hi all again. I got japan MD. :3 Here is it PCB (IC BD M5 VA1):
And I drew attention to the strange chip in DIP16. It was 315-5339, placed between VDP and Z80. I saw it first time. Here is it:
Google told me just one place. "３１５－５３３９：よくわかんない。（Ｚ８０の関係？プロテクト？リージョン？）初期の奴にはなかった。", wich translated by Google as "315-5339: I do not know well. (Relationship Z80? Protection? Region?) In the early guys did.". Some of my friends found another small info: "315 - 5339 DIP16 RAM refresh and EDCLK generation. Only found in MD1 VA0 and VA1". And I traced its pins:
Also, arbiter is 315-5308 and it in QFP-80. In PAL version arbiter is 315-5364 in QFP-100 and has clone ТА-04. What do you think?
And I drew attention to the strange chip in DIP16. It was 315-5339, placed between VDP and Z80. I saw it first time. Here is it:
Google told me just one place. "３１５－５３３９：よくわかんない。（Ｚ８０の関係？プロテクト？リージョン？）初期の奴にはなかった。", wich translated by Google as "315-5339: I do not know well. (Relationship Z80? Protection? Region?) In the early guys did.". Some of my friends found another small info: "315 - 5339 DIP16 RAM refresh and EDCLK generation. Only found in MD1 VA0 and VA1". And I traced its pins:
Code: Select all
1 - GND 16 - +5V
2 - VDP#43 HSYNC 15 - +5V
3 - GND 14 - +5V
4 - VDP#84 VA11 13 - +5V
5 - VDP#45 M3 12 - X
6 - VDP#117 OEO 11 - RAM LCS (IA14)
7 - VDP#52 MCLK 10 - RAM HOE (EOE)
8 - GND 9 - VDP#53 EDCLK
