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4enlinea: More docs and custom CM3080 circuitry.

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This commit is contained in:
Roberto Fresca 2014-03-31 03:04:47 +00:00
parent d6bdfb79dc
commit 5c6beacd85
1 changed files with 32 additions and 12 deletions
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44
src/mame/drivers/4enlinea.c
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@ -44,14 +44,14 @@
Offsets are for sure the CGA mode. MGA mode has different ones.
3D4h: W CRTC index register.
3D4h: -W CRTC index register.
3D5h: RW CRTC data register.
3D8h: W Mode control register.
3D9h: W Color select register.
3DAh: R Status register.
3BFh: W Config register.
3D8h: -W Mode control register.
3D9h: -W Color select register.
3DAh: R- Status register.
3BFh: -W Config register.
Mode CTRL (3D8h) 6Ah:
Mode CTRL (3D8h): 0x6A / 0x62
----- bits -----
7 6 5 4 3 2 1 0 For CGA Mode.
- x x - x - x -
@ -120,26 +120,46 @@
'-------------'
74HC244 (IC9) 74HC244 (IC10)
.-------. .-------.
.---v---. .---v---.
GAL (PIN 17) --|01 20|-- VCC GAL (PIN 16) --|01 20|-- VCC
8952 (PIN 04) --|02 19|-- GAL (PIN 17) 8952 (PIN 08) --|02 19|-- GAL (PIN 16)
Z80 (D7) --|03 18|-- Z80 (D0) Z80 (D7) --|03 18|-- Z80 (D0)
MAIN Z80 (D7) --|03 18|-- MAIN Z80 (D0) MAIN Z80 (D7) --|03 18|-- MAIN Z80 (D0)
8952 (PIN 03) --|04 17|-- 8952 (PIN 40) 8952 (PIN 07) --|04 17|-- 8952 (PIN 36)
Z80 (D6) --|05 16|-- Z80 (D1) Z80 (D6) --|05 16|-- Z80 (D1)
MAIN Z80 (D6) --|05 16|-- MAIN Z80 (D1) MAIN Z80 (D6) --|05 16|-- MAIN Z80 (D1)
8952 (PIN 02) --|06 15|-- 8952 (PIN 39) 8952 (PIN 06) --|06 15|-- 8952 (PIN 35)
Z80 (D5) --|07 14|-- Z80 (D2) Z80 (D5) --|07 14|-- Z80 (D2)
MAIN Z80 (D5) --|07 14|-- MAIN Z80 (D2) MAIN Z80 (D5) --|07 14|-- MAIN Z80 (D2)
8952 (PIN 01) --|08 13|-- 8952 (PIN 38) 8952 (PIN 05) --|08 13|-- 8952 (PIN 34)
Z80 (D4) --|09 12|-- Z80 (D3) Z80 (D4) --|09 12|-- Z80 (D3)
MAIN Z80 (D4) --|09 12|-- MAIN Z80 (D3) MAIN Z80 (D4) --|09 12|-- MAIN Z80 (D3)
GND --|10 11|-- 8952 (PIN 37) GND --|10 11|-- 8952 (PIN 33)
'-------' '-------'
ES2 CM3080 pinouts and peripheral circuitry:
CM3080
.---v---.
VCC --|01 18|-- VCC .--------.
N/C --|02 17|----------------+ 16 MHz |
N/C --|03 16|----------------+ Xtal |
N/C --|04 15|-- CLK OUT --. '--------'
GND --|05 14|-- N/C |
GND --|06 13|-- N/C '--+-- (8MHz) UM487F (PIN 01, CLK)
MAIN Z80 (/M1) --|07 12|-- GND +-- (8MHz) MAIN Z80 (PIN 06, CLK)
GAL (PIN 11) --|08 11|-- VCC
GND --|09 10|-- MAIN Z80 (/INT)
'-------'
Notes:
- Looks like the GAL is switching the different '8952 CM 32' outputs
through the 74HC244 drivers to the Z80 data bus.
- CN1, CN2 & CN3 are blind connectors.
- 8952 pinouts to CN1 & CN2, are also passing through locations
IC14 & IC15 (both are unpopulated from factory).
IC14 & IC15 (both are unpopulated from factory).
- GAL is GAL16V8 at location IC4.
- CM3080 pins 16 & 17 have a 1 Megohm resistor in parallel before connect the
16 MHz. crystal.
**************************************************************************