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socrates.cpp: Add note about Socrates English ROM being the same for NTSC and PAL (nw)

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ClawGrip 2019-10-08 15:05:53 +02:00 committed by Vas Crabb
parent cb9e88732f
commit a110c8923c
1 changed files with 7 additions and 7 deletions
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14
src/mame/drivers/socrates.cpp
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@ -1570,9 +1570,9 @@ void iqunlimz_state::iqunlimz(machine_config &config)
ROM_START(socrates)
ROM_REGION(0x400000, "maincpu", ROMREGION_ERASEVAL(0xF3)) /* can technically address 4mb of rom via bankswitching; open bus area reads as 0xF3 on fluke */
/* Socrates US NTSC */
/* all cart roms are 28 pin 23c1000/tc531000 128Kx8 roms */
/* cart port pinout:
/* Socrates English (same ROM for NTSC and PAL) */
/* All cart ROMs are 28 pin 23c1000/tc531000 128Kx8 ROMs */
/* Cart port pinout:
(looking into end of disk-shaped cartridge with label/top side pointing to the right)
A15 -> 19 18 -- VCC
A14 -> 20 17 <- A16
@ -1595,9 +1595,9 @@ ROM_START(socrates)
Note that a17 goes to what would be pin 2 on a rom chip if a 32 pin rom were installed, which is not the case. (pins 1, 31 and 32 would be tied to vcc)
It is likely that at least one of the 6 unknown lines is R/W from the z80, and another may be phi1/m1/clock etc to allow for ram to live in cart space
Cartridge check procedure by socrates is, after screen init and check for speech synth,
Cartridge check procedure by Socrates is, after screen init and check for speech synth,
bankswitch to bank 0x10 (i.e. first 0x4000 of cart appears at 4000-7fff in z80 space),
do following tests; if any tests fail, jump to 0x0015 (socrates main menu)
do following tests; if any tests fail, jump to 0x0015 (Socrates main menu)
* read 0x7ff0(0x3ff0 in cart rom) and compare to 0xAA
* read 0x7ff1(0x3ff1 in cart rom) and compare to 0x55
* read 0x7ff2(0x3ff2 in cart rom) and compare to 0xE7
@ -1692,7 +1692,7 @@ ROM_END
******************************************************************************/
// YEAR NAME PARENT COMPAT MACHINE INPUT STATE INIT COMPANY FULLNAME FLAGS
COMP( 1988, socrates, 0, 0, socrates, socrates, socrates_state, init_socrates, "Video Technology", "Socrates Educational Video System", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE ) // English NTSC, no title copyright
COMP( 1988, socrates, 0, 0, socrates, socrates, socrates_state, init_socrates, "Video Technology", "Socrates Educational Video System", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE ) // English, no title copyright, same ROM for NTSC and PAL
COMP( 1988, socratfc, socrates, 0, socrates, socrates, socrates_state, init_socrates, "Video Technology", "Socrates SAITOUT", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE ) // French Canandian NTSC, 1988 title copyright
// Yeno Professeur Saitout (French SECAM) matches the Socrates SAITOUT dump (same ROM 27-00884-001-000)
COMP( 1988, profweis, socrates, 0, socrates_pal, socrates, socrates_state, init_socrates, "Video Technology / Yeno", "Professor Weiss-Alles", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE ) // German PAL, 1988 title copyright
@ -1700,5 +1700,5 @@ COMP( 1988, profweis, socrates, 0, socrates_pal, socrates, socrates_state,
COMP( 1991, iqunlimz, 0, 0, iqunlimz, iqunlimz, iqunlimz_state, init_iqunlimz, "Video Technology", "IQ Unlimited (Z80)", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_SOUND )
COMP( 1991, vpainter, 0, 0, socrates_pal, socrates, socrates_state, init_vpainter, "Video Technology", "Video Painter (PAL)", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_SOUND )
COMP( 1991, vpainter, 0, 0, socrates_pal, socrates, socrates_state, init_vpainter, "Video Technology", "Video Painter (PAL)", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_SOUND )
// Master Video Painter goes here