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r19985 Tuesday 1st January, 2013 at 13:11:39 UTC by Wilbert Pol
(MESS) microvsn.c: Small documentation update and improvements to clock speeds (nw)
[src/mess/drivers]microvsn.c

trunk/src/mess/drivers/microvsn.c
r19984r19985
66    * Add support for the paddle control
77    * Finish support for i8021 based cartridges
88
9Since the microcontrollers were on the cartridges it was possible to have
10different clocks on different games.
11The Connect Four I8021 game is clocked at around 2MHz. The TMS1100 versions
12of the games were clocked at around 500KHz, 550KHz, or 300KHz.
13
914****************************************************************************/
1015
1116#include "emu.h"
r19984r19985
447452
448453
449454static MACHINE_CONFIG_START( microvision, microvision_state )
450   MCFG_CPU_ADD("maincpu1", I8021, 400000)   // totally wild guess, needs to be verified
455   MCFG_CPU_ADD("maincpu1", I8021, 2000000)   // approximately
451456   MCFG_CPU_IO_MAP( microvision_8021_io )
452   MCFG_CPU_ADD("maincpu2", TMS1100, 400000)
453   MCFG_CPU_CONFIG( microvision_tms0980_config ) // totally wild guess, needs to be verified
457   MCFG_CPU_ADD("maincpu2", TMS1100, 500000)   // most games seem to be running at approximately this speed
458   MCFG_CPU_CONFIG( microvision_tms0980_config )
454459
455460   MCFG_SCREEN_ADD("screen", LCD)
456461   MCFG_SCREEN_REFRESH_RATE(60)

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