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エッジコネクタ

pinout

01:GND         31:+5V
02:CPU A11     32:CPU φ2
03:CPU A10     33:CPU A12
04:CPU A9      34:CPU A13
05:CPU A8      35:CPU A14
06:CPU A7      36:CPU D7
07:CPU A6      37:CPU D6
08:CPU A5      38:CPU D5
09:CPU A4      39:CPU D4
10:CPU A3      40:CPU D3
11:CPU A2      41:CPU D2
12:CPU A1      42:CPU D1
13:CPU A0      43:CPU D0
------------------------
14:CPU R/W     44:CPU /ROMCS
15:CPU /IRQ    45:SOUND IN
16:GND         46:SOUND OUT
17:PPU /RD     47:PPU /WR
18:VRAM A10    48:VRAM /CS
------------------------
19:PPU A6      49:PPU /A13
20:PPU A5      50:PPU A7
21:PPU A4      51:PPU A8
22:PPU A3      52:PPU A9
23:PPU A2      53:PPU A10
24:PPU A1      54:PPU A11
25:PPU A0      55:PPU A12
26:PPU D0      56:PPU A13
27:PPU D1      57:PPU D7
28:PPU D2      58:PPU D6
29:PPU D3      59:PPU D5
30:+5V         60:PPU D4
CPU φ2
CPU machine cycle. 別名:M2, phi2, clk
CPU /ROMCS
= CPU ~(A15 & φ2), 正確なA15は得られない事に注意
CPU R/W
H:read, L:write
VRAM A10, /CS
tilemap(nametable) select, PPU address $2000-$2fff

CPU A0-A14

CPU address bus.

  • バンクがある場合は Prgram ROM A13-A14 はマッパから提供される.
  • 別名:PAxx, Axx

PPU A0-A12, A13

PPU address bus. A13 は PPU charcter area /CS になる. PPU /A13 と紛らわしい.

L
select PPU address $0000-$1fff
H
select PPU address $2000-$3fff
  • バンクがある場合は Charcter ROM A10-A12 はマッパから提供される.
  • まれに Charcter RAM A10-A12 も制御される.
  • 別名:CAxx, PAxx

PPU /A13

PPU A13 の反転信号。

H
select PPU address $0000-$1fff
L
select PPU address $2000-$3fff
Last modified:2009/01/22 13:32:41
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References:[FrontPage]