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update comments in cat.c
This commit is contained in:
Jonathan Gevaryahu 2013-10-15 17:58:54 +00:00
parent 5f43b29429
commit 3b2d29bba1
1 changed files with 57 additions and 16 deletions
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73
src/mess/drivers/cat.c
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@ -2,10 +2,32 @@
Canon Cat, Model V777
IAI Swyft Model P0001
driver by Miodrag Milanovic and Lord Nightmare
Copyright (C) 2009-2013 Miodrag Milanovic and Jonathan Gevaryahu AKA Lord Nightmare
With information and help from John "Sandy" Bumgarner, Dwight Elvey,
Charles Springer, Terry Holmes, Jonathan Sand, Aza Raskin and others.
This source file is dual-licensed under the following licenses:
1. The MAME license as of September 2013
2. The GNU LGPLv2.1:
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Please contact the authors if you require other licensing.
This driver is dedicated in memory of Jef Raskin and Dave Boulton
12/06/2009 Skeleton driver.
@ -182,20 +204,38 @@ Board name: 950-0001C
| '----------' '-------------------' || INFORMATION O T O | O =
| TMS4256 74F153 "VIDEO 2B" .----------. J4 APPLIANCE INC. R I R | U =
| | AM27256 | 74HC02 74HC374 || Copyright 1985 S O S | T =
| TMS4256 74F153 74LS393 |__________| || UM95089 Y2 N | =
| TMS4256 74F153 74LS393 B1|__________| || UM95089 Y2 N | =
|_____________________________[________J9___]__________________________________________________D13______|_____=
*Devices of interest:
J1: breakout of joystick, serial/rs232, hex-keypad, parallel port, and forth switch (and maybe cassette?) pins
DIL 60 pin 2-row right-angle rectangular connector with metal shield contact;
not all 60 pins are populated in the connector, only pins 1-6, 8, 13-15, 17-18, 23-30, 35-60 are present
(traced partly by dwight)
J2: unpopulated 8-pin sip header, serial/rs232-related?
J3: Floppy Connector (standard DIL 34 pin mini-shugart/pc floppy connector)
(vcc ? ? ? ? ? ? gnd)
J3: Floppy Connector
(standard DIL 34 pin 2-row rectangular connector for mini-shugart/pc floppy cable; pin 2 IS connected somewhere)
J4: 18-pin sip header for keyboard ribbon cable
J5: Berg type socket for supplying power (5v gnd gnd 12v) to the floppy drive
(needs tracing to see the VIA hookup order)
J5: locking-tab-type "CONN HEADER VERT 4POS .100 TIN" connector for supplying power
through a small cable with a berg connector at the other end, to the floppy drive
(5v gnd gnd 12v)
J6: Phone connector, rj11 jack
J7: Line connector, rj11 jack
J8: 9-pin Video out/power in connector
J9: unpopulated holes for a DIL connector for a ROM expansion/shadow/replacement daughterboard
J8: 9-pin Video out/power in connector "CONN RECEPT 6POS .156 R/A PCB" plus "CONN RECEPT 3POS .156 R/A PCB" acting as one 9-pin connector
(NC ? ? ? NC NC ? 12v 5v) (video, vsync, hsync and case/video-gnd are likely here)
J9: unpopulated DIL 40-pin straight connector for a ROM debug/expansion/RAM-shadow daughterboard
the pins after pin 12 connect to that of the ROM-LO 27256 pinout counting pins 1,28,2,27,3,26,etc
the ROM-HI rom has a different /HICE pin which is not connected to this connector
/LOCE is most likely !(a19|a18)&a15
/HICE is most likely !(a19|a18)&!a15
pin 1 (GND) is in the lower left and the pins count low-high then to the right
(gnd ? ? ? ? ? vcc a14 a13 a8 a9 a11 /OE a10 /LOCE d7 d6 d5 d4 d3 )
(GND ? ? ? gnd ? vcc a12 a7 a6 a5 a4 a3 a2 a1 a0 d0 d1 d2 gnd)
Jx: 4 pin on top side, 6 pin on bottom side edge ?debug? connector (doesn't have a Jx number)
(trace me!)
B1: a cut-able trace on the pcb. Not cut, affects one of the pins on the unpopulated J9 connector only.
E1: jumper, unknown purpose, not set
E2: jumper, unknown purpose, not set
D13: LED
@ -210,13 +250,13 @@ PB1 - piezo speaker
*Pals:
"TIMING B" - AMPAL16R4APC (marked on silkscreen "TIMING PAL")
"DECODE E" - AMPAL16L8PC (marked on silkscreen "DECODE PAL")
"VIDEO 2B" - AMPAL16R4APC (marked on silkscreen "VIDEO PAL")
"VIDEO 2B" - AMPAL16R4PC (marked on silkscreen "VIDEO PAL")
"DISK 3.5C" - AMPAL16R4PC (marked on silkscreen "DISK PAL")
*Deviations from silkscreen:
4N37 (marked on silkscreen "4N35")
74F153 (marked on silkscreen "74ALS153")
74HCT259 is socketed, possibly intended that the rom expansion daughterboard will have a ribbon cable fit in its socket
74HCT259 is socketed, possibly intended that the rom expansion daughterboard will have a ribbon cable fit in its socket?
ToDo:
@ -1118,8 +1158,9 @@ MACHINE_CONFIG_END
/* Swyft Memory map, based on watching the infoapp roms do their thing:
68k address map:
(a23,a22,a21,a20 lines don't exist on the 68008 so are considered unconnected)
a23 a22 a21 a20 a19 a18 a17 a16 a15 a14 a13 a12 a11 a10 a9 a8 a7 a6 a5 a4 a3 a2 a1 (a0 via UDS/LDS)
x x x x 0 0 ? ? * * * * * * * * * * * * * * * a R ROM (a=0 is low, a=1 is high)
a23 a22 a21 a20 a19 a18 a17 a16 a15 a14 a13 a12 a11 a10 a9 a8 a7 a6 a5 a4 a3 a2 a1 a0
x x x x 0 0 ? ? 0 * * * * * * * * * * * * * * * R ROM-LO (/LOCE is 0, /HICE is 1)
x x x x 0 0 ? ? 1 * * * * * * * * * * * * * * * R ROM-HI (/LOCE is 1, /HICE is 0)
x x x x 0 1 * * * * * * * * * * * * * * * * * a RW RAM
x x x x 1 1 ?0? ?1? ? ? ? ? ? ? ? ? ? ? ? ? * * * * R ? status of something? floppy?
x x x x 1 1 ?1? ?0? ? 0 0 1 ? ? ? ? ? ? ? ? ? ? ? ? ?R?W 6850 acia control reg lives here, gets 0x55 steadystate and 0x57 written to it to reset it
@ -1541,10 +1582,10 @@ ROM_START( swyft )
ROMX_LOAD( "infoapp.lo.u30", 0x0000, 0x8000, CRC(52c1bd66) SHA1(b3266d72970f9d64d94d405965b694f5dcb23bca), ROM_BIOS(2))
ROMX_LOAD( "infoapp.hi.u31", 0x8000, 0x8000, CRC(83505015) SHA1(693c914819dd171114a8c408f399b56b470f6be0), ROM_BIOS(2))
ROM_REGION( 0x4000, "pals", ROMREGION_ERASEFF )
ROM_LOAD( "timing_b.pal16r4.u9.jed", 0x0000, 0xb08, CRC(643e6e83) SHA1(7db167883f9d6cf385ce496d08976dc16fc3e2c3))
ROM_LOAD( "decode_e.pal16l8.u20.jed", 0x1000, 0xb08, CRC(0b1dbd76) SHA1(08c144ad7a7bbdd53eefd271b2f6813f8b3b1594))
ROM_LOAD( "video_2b.pal16r4.u25.jed", 0x2000, 0xb08, CRC(caf91148) SHA1(3f8ddcb512a1c05395c74ad9a6ba7b87027ce4ec))
ROM_LOAD( "disk_3.5c.pal16r4.u28.jed", 0x3000, 0xb08, CRC(fd994d02) SHA1(f910ab16587dd248d63017da1e5b37855e4c1a0c))
ROM_LOAD( "timing_b.ampal16r4a.u9.jed", 0x0000, 0xb08, CRC(643e6e83) SHA1(7db167883f9d6cf385ce496d08976dc16fc3e2c3))
ROM_LOAD( "decode_e.ampal16l8.u20.jed", 0x1000, 0xb08, CRC(0b1dbd76) SHA1(08c144ad7a7bbdd53eefd271b2f6813f8b3b1594))
ROM_LOAD( "video_2b.ampal16r4.u25.jed", 0x2000, 0xb08, CRC(caf91148) SHA1(3f8ddcb512a1c05395c74ad9a6ba7b87027ce4ec))
ROM_LOAD( "disk_3.5c.ampal16r4.u28.jed", 0x3000, 0xb08, CRC(fd994d02) SHA1(f910ab16587dd248d63017da1e5b37855e4c1a0c))
ROM_END
ROM_START( cat )
@ -1596,7 +1637,7 @@ ROM_START( cat )
* (since no rom is in the socket; it reads as open bus, sometimes 0x2E)
* svrom-2 maps to 240000-25ffff every ODD byte (d8-d0)
* (since no rom is in the socket; it reads as open bus, sometimes 0x80)
* there is no svrom-3; 240000-25ffff EVEN always reads as 0x2E
* there is no svrom-3 socket; 240000-25ffff EVEN always reads as 0x2E
* since ROM_FILL16BE(0x0, 0x80000, 0x2e80) doesn't exist, the
* even bytes and latter chunk of the svrom space need to be filled in
* DRIVER_INIT or some other means needs to be found to declare them as