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r40054 Wednesday 29th July, 2015 at 17:23:11 UTC by MetalliC
Sega 837-14645 JVS I/O dumped [Darksoft]
notes about 315-6146 MCU (nw)
[src/mame/drivers]naomi.c
[src/mame/machine]mie.c

trunk/src/mame/drivers/naomi.c
r248565r248566
889889
890890837-13741
891891837-13844-02 (sticker)
892837-14645
892893|-----------------------------|
893894|       CN8        CN9        |
894895|DB9                       CN1|
r248565r248566
924925      IC6  - Sega 315-6146 custom IC (QFP176)
925926      IC7  - 27C512 EPROM with label 'EPR-22082' (DIP28)
926927             On plain 837-13844 (no -02) this is 'EPR-21868' (DIP28)
928             On later 837-14645 it is 'EPR-24354'
927929      IC8  - Sharp LH52256 32k x8 SRAM (SOP28)
928930      IC10 - NEC D71054GB programmable counter/timer (QFP44)
929931      OSC1 - 14.7456MHz
r248565r248566
46434645   ROM_LOAD( "mpr-22182.ic19s", 0x9800000, 0x800000, CRC(c5606c42) SHA1(5871104ff1c7acde0493e13b9a4d0abdf8a40728) )
46444646   ROM_LOAD( "mpr-22183.ic20s", 0xa000000, 0x800000, CRC(776af308) SHA1(7d29cb4dce75d34c622549fea7e102868d0da60a) )
46454647
4646   // JVS I/O board 837-13844, code is for a Z80 of unknown type (it's inside the big Sega ASIC)
4648   // JVS I/O board 837-13844, external Z80 code for Sega 315-6146 "MIE" MCU
46474649   ROM_REGION( 0x20000, "jvsio", ROMREGION_ERASEFF)
46484650   ROM_LOAD( "epr-21868.ic7", 0x000000, 0x010000, CRC(c306a51f) SHA1(7833b73dc34c4c62401a30637968f46b949ceac0) )
46494651   // later version of the same I/O board (temporary, we'll handle this properly later)
46504652   ROM_LOAD( "epr-22082.ic7", 0x010000, 0x010000, CRC(de26fc6c) SHA1(cf8ef7969770fff8697299c3e3152413b898a967) )
4653   // 837-14645 JVS I/O, uses same PCB as 837-13844
4654   ROM_LOAD( "epr-24354.ic7", 0x000000, 0x010000, CRC(0ce43505) SHA1(7700e3acfb756dfbf95f3ff14786d1bcb57e2f7d) )
46514655
46524656   // 18 Wheeler motor controller 838-13992, code is for a TMPZ84C015 which is Z80 compatible
46534657   ROM_REGION( 0x10000, "motorio", ROMREGION_ERASEFF)
trunk/src/mame/machine/mie.c
r248565r248566
55#include "mie.h"
66#include "maple-dc.h"
77
8// MIE aka sega 315-6146, MAPLE-JVS bridge Z80-based MCU
8// MIE aka Sega 315-6146, MAPLE-JVS bridge Z80-based MCU
99//
1010// Todos:
11// - In reality, there are two rs422/rs486 ports, one at 10-15 and one
12//   at 20-25.  Perhaps they're a standard design?
11// - ports 00-0f is identical to Sega 315-5338A/315-5649 I/O ICs
12//   (used in Sega H1, Model 2, etc). devicefication needed.
1313//
14// - There's also a different port at 0x09-0x0d, supposedly used for cards.
14// - ports 10-15 and 20-25 is standard 8250/16xxx UARTs.
1515//
16// - ports a0-af - external I/O 1, in JVS I/Os connected to NEC uPD71053 counter/timer
17//
18// - ports c0-cf - external I/O 2, not used
19//   in JVS I/Os can be connected to (unpopulated) 315-5296 I/O IC, if enabled by DIP switch
20//
21// - both memory and I/O address spaces can be directly accessed by host system (used in Hikaru)
22//
1623// - Speed is all wrong
1724
1825


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