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Merit Match Games driver: Added technical notes and corrected

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CRT 810 layout + old notes. [Roberto Fresca]
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RobertoFresca 2016-05-26 21:18:34 -03:00
parent 0023938081
commit cfdec4e84f
1 changed files with 17 additions and 33 deletions
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50
src/mame/drivers/mgames.cpp
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@ -2,8 +2,9 @@
// copyright-holders:Angelo Salese, Roberto Fresca, David Haywood
/*********************************************************************************
Merit Industries Match Games (1981)
-----------------------------------
Match Games.
CRT 100 + CRT 810 boards system.
Merit Industries, 1981.
Driver by Angelo Salese, David Haywood & Roberto Fresca.
@ -80,7 +81,7 @@
---------------
1x OSC = 18.000 MHz.
1x CPU = Zilog Z80 (Z0840006PSC / 9512 / 2K).
1x CPU = Zilog Z80 (Z0840006PSC).
4x 74LS253N (multiplexers).
4x MM2114N-3 (4096-Bit Static RAM).
2x SCM5101E (256x4 Static RAM).
@ -88,7 +89,7 @@
The PCB has a socket for two standard AA batteries
MAIN BOARD:
MAIN BOARD CRT 100:
.------------------------. .-------------------. .---------------------------.
| | ||||||||||||||||||||| | .------------. |
| '-' J2 '-' -|4.7 Ohm 10% |- |
@ -139,7 +140,6 @@
| '-----' '-----' '-----' '-----' |
'----------------------------------------------------------------------------'
U13 = MLTI 0 U68 = CGM 0
U14 = MLTI 1 U67 = CGM 1
U15 = MLTI 2 U66 = CGM 2
@ -151,49 +151,33 @@
J1 = Jumpers bank? (see multiplexed port)
VIDEO I/O BOARD CRT810:
VIDEO I/O BOARD CRT 810:
.-------------------.
|||||||||||||||||||||
.-----------------------' '----------------------.
.-----------------------|||||||||||||||||||||----------------------.
| |
| LM380N |
| |
| MC1455P |
| DISCRETE |
| CIRCUITRY MC1455P |
| |
| |
| SW 7407-N SW 7407-N SW 7407-N SW 7407-N |
| 21430 7301 21430 7301 21430 7301 21430 7301 |
| ML7805 |
| SW 7407-N SW 7407-N SW 7407-N SW 7407-N +5V. |
| |
| 74LS259N 74LS259N 74LS259N 74LS259N |
| 74LS259N 74LS259N 74LS259N MC7812 |
| +12V. |
| |
'----------------. .----------------'
||||||||||||||||||||||||||||||||||
'----------------||||||||||||||||||||||||||||||||||----------------'
'--------------------------------'
To J4 on Main Board
To J4 on Main Board
LM380N = 2.5W Audio Power Amplifier.
MC1455P = Direct Replacement for NE555 Timers.
(Audio seems to be discrete).
(Audio IS discrete).
4x 7407N (Buffer Gates Non-Inverting).
4x 74LS259N (8-Bit Addressable Latches).
4x 7301 (HDSP?)(RED Seven Segment Displays).
+---------+ Pin | Description
| A | ----+------------
| --- | 01 | Anode (4).
| F| |B | 02 | Cathode F.
| -G- | 03 | Cathode G.
| E| |C | 04 | Cathode E.
| --- | 05 | Cathode D.
| D .DP| 06 | Anode (4).
+---------+ 07 | Cathode DP.
08 | Cathode C.
09 | Cathode B.
10 | Cathode A.
**********************************************************************************
@ -224,6 +208,7 @@
- Color system (no bipolar PROMs in the system), needs a reference
- Discrete sound.
**********************************************************************************/
@ -231,7 +216,6 @@
#include "emu.h"
#include "cpu/z80/z80.h"
//#include "sound/dac.h"
#include "machine/nvram.h"
#include "mgames.lh"