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cat.c: (Canon Cat) Fixed a mistake in the memory map mirroring due to an error during testing; added proper readback of the floppy control register, and corrected the floppy status readback so it thinks that no floppy is inserted. [Lord Nightmare]

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Jonathan Gevaryahu 2013-02-22 22:39:22 +00:00
parent 91e732a2c8
commit 8216e009b4
1 changed files with 74 additions and 25 deletions
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src/mess/drivers/cat.c
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@ -76,6 +76,13 @@ Optional further steps:
If ever in forth mode you can return to the editor with the forth word (without quotes) "re" If ever in forth mode you can return to the editor with the forth word (without quotes) "re"
Canon cat gate array ASIC markings:
GA1 (prototype): D65013CW276 [same as final]
GA1 (final): NH4-5001 276 [schematic: upD65013CW-276]
GA2 (prototype): D65013CW208 [DIFFERENT FROM FINAL! larger asic used here, shrank for final?]
GA2 (final): NH4-5002 191 [schematic: upD65012CW-191]
GA3 (prototype): D65013CW141 [same as final? typo 65013 vs 65012?]
GA3 (final): NH4-5003 141 [schematic: upD65012CW-141]
Canon cat credits easter egg: Canon cat credits easter egg:
* hold either leap key, then simultaneously hold shift, then type Q W E R A S D F Z X C V and release all the keys * hold either leap key, then simultaneously hold shift, then type Q W E R A S D F Z X C V and release all the keys
@ -83,14 +90,31 @@ Canon cat credits easter egg:
Canon Cat credits details: (WIP) Canon Cat credits details: (WIP)
Scott Kim - responsible for fonts on swyft and cat Scott Kim - responsible for fonts on swyft and cat
Ralph Voorhees - Model construction and mockups (swyft 'flat cat')
Cat HLSL stuff:
*scanlines:
the cat has somewhat visible and fairly close scanlines with very little fuzziness
try hlsl options:
hlsl_prescale_x 4
hlsl_prescale_y 4
scanline_alpha 0.3
scanline_size 1.0
scanline_height 0.7
scanline_bright_scale 1.0
scanline_bright_offset 0.6
*phosphor persistence of the original cat CRT is VERY LONG and fades to a greenish-yellow color, though the main color itself is white
try hlsl option:
phosphor_life 0.93,0.95,0.87
which is fairly close but may actually be too SHORT compared to the real thing.
Swyft versions: Swyft versions:
There are at least 4 variants of machines called 'swyft': There are at least 4 variants of machines called 'swyft':
* The earliest desktop units which use plexi or rubber-tooled case and an * The earliest desktop units which use plexi or rubber-tooled case and an
angled monitor; about a dozen were made and at least two of clear plexi. angled monitor; about a dozen were made and at least two of clear plexi.
These are sometimes called "wrinkled" swyfts. 5.25" drive, may be able to These are sometimes called "wrinkled" swyfts. 5.25" drive, they may be able
read Apple2 Swyftware and Swyftcard-created disks. to read Apple2 Swyftware/Swyftdisk and Swyftcard-created disks.
It is possible no prototypes of this type got beyond the 'runs forth console only' stage. It is possible no prototypes of this type got beyond the 'runs forth console only' stage.
http://archive.computerhistory.org/resources/access/physical-object/2011/09/102746929.01.01.lg.JPG http://archive.computerhistory.org/resources/access/physical-object/2011/09/102746929.01.01.lg.JPG
http://www.digibarn.com/collections/systems/swyft/Swyft-No2-05-1271.jpg http://www.digibarn.com/collections/systems/swyft/Swyft-No2-05-1271.jpg
@ -99,11 +123,13 @@ There are at least 4 variants of machines called 'swyft':
case and just a keyboard. Model SP0001 case and just a keyboard. Model SP0001
http://www.digibarn.com/collections/systems/swyft/Image82.jpg http://www.digibarn.com/collections/systems/swyft/Image82.jpg
* The later "ur-cat" desktop units which use a machine tooled case and look * The later "ur-cat" desktop units which use a machine tooled case and look
more or less like the canon cat. about 100-200 were made. 3.5" drive. more or less like the canon cat. Around 100-200 were made. 3.5" drive.
These have a fully functional EDDE editor as the cat does, and can even compile forth programs. These have a fully functional EDDE editor as the cat does, and can even compile
forth programs.
(the 'swyft' driver is based on one of these) (the 'swyft' driver is based on one of these)
* The very late portable LCD units with a dark grey case and a row of hotkey * The very late portable LCD units with a dark grey case and a row of hotkey
buttons below the screen. buttons below the screen. Not dumped yet. At least one functional prototype exists.
At least one plastic mockup exists with no innards.
http://www.digibarn.com/collections/systems/swyft/swyft.jpg http://www.digibarn.com/collections/systems/swyft/swyft.jpg
Canon Cat versions: Canon Cat versions:
@ -115,6 +141,8 @@ There is really only one version of the cat which saw wide release, the US versi
As for prototypes/dev cat machines, a few minor variants exist: As for prototypes/dev cat machines, a few minor variants exist:
* Prototype cat motherboards used 16k*4bit drams instead of 64k*4bit as the * Prototype cat motherboards used 16k*4bit drams instead of 64k*4bit as the
final system did and hence max out at 128k of dram instead of 512k. final system did and hence max out at 128k of dram instead of 512k.
One of the gate arrays is also different, and the motherboard is arranged
differently. The IC9 "buserr" PAL is not used, even on the prototype.
The final system included 256k of dram and can be upgraded to 512k. The final system included 256k of dram and can be upgraded to 512k.
* At least some developer units were modified to have an external BNC * At least some developer units were modified to have an external BNC
connector, ostensibly to display the internal screen's video externally. connector, ostensibly to display the internal screen's video externally.
@ -302,6 +330,7 @@ public:
UINT8 m_video_invert; UINT8 m_video_invert;
UINT16 m_pr_cont; UINT16 m_pr_cont;
UINT8 m_keyboard_line; UINT8 m_keyboard_line;
UINT8 m_floppy_control;
TIMER_CALLBACK_MEMBER(keyboard_callback); TIMER_CALLBACK_MEMBER(keyboard_callback);
TIMER_CALLBACK_MEMBER(counter_6ms_callback); TIMER_CALLBACK_MEMBER(counter_6ms_callback);
@ -371,15 +400,20 @@ WRITE16_MEMBER( cat_state::cat_video_control_w )
} }
// Floppy control register (called fd.cont in the cat source code) // Floppy control register (called fd.cont in the cat source code)
/* FEDCBA98 (76543210 is ignored) /* FEDCBA98 (76543210 is open bus)
* |||||||\-- ?always low? (may be some sort of 'reset' or debug bit? the cat code explicitly clears this bit but never sets it) * |||||||\-- unknown[1] (may be some sort of 'reset' or debug bit? the cat code explicitly clears this bit but never sets it)
* ||||||\--- WRITE GATE: 0 = write head disabled, 1 = write head enabled (verified from cat source code) * ||||||\--- WRITE GATE: 0 = write head disabled, 1 = write head enabled (verified from cat source code)
* |||||\---- ?always high? (leftover debug bit? unused by cat code) * |||||\---- unknown[2] (leftover debug bit? unused by cat code)
* ||||\----- /DIRECTION: 1 = in, 0 = out (verified from forth cmd) * ||||\----- /DIRECTION: 1 = in, 0 = out (verified from forth cmd)
* |||\------ /SIDESEL: 1 = side1, 0 = side0 (verified from forth cmd) * |||\------ /SIDESEL: 1 = side1, 0 = side0 (verified from forth cmd)
* ||\------- STEP: 1 = STEP active, 0 = STEP inactive (verified from cat source code) * ||\------- STEP: 1 = STEP active, 0 = STEP inactive (verified from cat source code)
* |\-------- MOTOR ON: 1 = on, 0 = off (verified) * |\-------- MOTOR ON: 1 = on, 0 = off (verified)
* \--------- /DRIVESELECT: 1 = drive 0, 0 = drive 1 (verified from forth cmd) * \--------- /DRIVESELECT: 1 = drive 0, 0 = drive 1 (verified from forth cmd)
* all 8 bits 'stick' on write and are readable at this register as well
* [1] writing this bit as high seems to 'freeze' floppy acquisition so
* the value at the floppy_data_r register is held rather than updated
* with new data from the shifter/mfm clock/data separator
* [2] this bit's function is unknown. it could possibly be an FM vs MFM selector bit, where high = MFM, low = FM ? or MFM vs GCR?
*/ */
// 0x800000-0x800001 read // 0x800000-0x800001 read
READ16_MEMBER( cat_state::cat_floppy_control_r ) READ16_MEMBER( cat_state::cat_floppy_control_r )
@ -387,7 +421,7 @@ READ16_MEMBER( cat_state::cat_floppy_control_r )
#ifdef DEBUG_FLOPPY_CONTROL_R #ifdef DEBUG_FLOPPY_CONTROL_R
fprintf(stderr,"Read from Floppy Status address %06X\n", 0x800000+(offset<<1)); fprintf(stderr,"Read from Floppy Status address %06X\n", 0x800000+(offset<<1));
#endif #endif
return 0x0480; return (m_floppy_control << 8)|0x80; // LOW 8 BITS ARE OPEN BUS
} }
// 0x800000-0x800001 write // 0x800000-0x800001 write
WRITE16_MEMBER( cat_state::cat_floppy_control_w ) WRITE16_MEMBER( cat_state::cat_floppy_control_w )
@ -395,6 +429,7 @@ WRITE16_MEMBER( cat_state::cat_floppy_control_w )
#ifdef DEBUG_FLOPPY_CONTROL_W #ifdef DEBUG_FLOPPY_CONTROL_W
fprintf(stderr,"Write to Floppy Control address %06X, data %04X\n", 0x800000+(offset<<1), data); fprintf(stderr,"Write to Floppy Control address %06X, data %04X\n", 0x800000+(offset<<1), data);
#endif #endif
m_floppy_control = (data >> 8)&0xFF;
} }
// 0x800002-0x800003 read = 0x0080, see open bus // 0x800002-0x800003 read = 0x0080, see open bus
@ -427,7 +462,7 @@ WRITE16_MEMBER( cat_state::cat_floppy_data_w )
} }
// 0x800008-0x800009: Floppy status register (called fd.status in the cat source code) // 0x800008-0x800009: Floppy status register (called fd.status in the cat source code)
/* FEDCBA98 (76543210 is ignored) /* FEDCBA98 (76543210 is open bus)
* |||||||\-- ? always low * |||||||\-- ? always low
* ||||||\--- ? always low * ||||||\--- ? always low
* |||||\---- READY: 1 = ready, 0 = not ready (verified from cat source code) * |||||\---- READY: 1 = ready, 0 = not ready (verified from cat source code)
@ -443,7 +478,7 @@ READ16_MEMBER( cat_state::cat_floppy_status_r )
#ifdef DEBUG_FLOPPY_STATUS_R #ifdef DEBUG_FLOPPY_STATUS_R
fprintf(stderr,"Read from Floppy Status address %06X\n", 0x800008+(offset<<1)); fprintf(stderr,"Read from Floppy Status address %06X\n", 0x800008+(offset<<1));
#endif #endif
return 0x0080; return 0x2480;
} }
// 0x80000a-0x80000b // 0x80000a-0x80000b
@ -488,9 +523,9 @@ WRITE16_MEMBER( cat_state::cat_printer_control_w )
{ {
/* /*
* FEDCBA98 (76543210 is ignored) * FEDCBA98 (76543210 is ignored)
* |||||||\-- CC line enable (verified from cat source code) * |||||||\-- CC line enable (pin 34) (verified from cat source code)
* ||||||\--- LEDE line enable (verified from cat source code) * ||||||\--- LEDE line enable (pin 33) (verified from cat source code)
* |||||\---- ? * |||||\---- ? May control pin 32?
* ||||\----- ? always seems to be written as high? * ||||\----- ? always seems to be written as high?
* |||\------ ? * |||\------ ?
* ||\------- ? * ||\------- ?
@ -585,12 +620,11 @@ READ16_MEMBER( cat_state::cat_0080_r )
68k address map: 68k address map:
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) 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)
*i *i * x x * * * x x x x x x x x x x x x x x x x *GATE ARRAY 2 DECODES THESE LINES TO ENABLE THIS AREA* (a23 and a22 are indirectly decoded via the /RAMROMCS and /IOCS lines from gate array 1) *i *i * x x * * * x x x x x x x x x x x x x x x x *GATE ARRAY 2 DECODES THESE LINES TO ENABLE THIS AREA* (a23 and a22 are indirectly decoded via the /RAMROMCS and /IOCS lines from gate array 1)
0 0 0 0 x 0 a * * * * * * * * * * * * * * * * b R ROM (ab: 00=ic4 01=ic2 10=ic5 11=ic3) (EPROM 27C512 x 4) [controlled via GA2 /ROMCS] 0 0 0 x x 0 a * * * * * * * * * * * * * * * * b R ROM (ab: 00=ic4 01=ic2 10=ic5 11=ic3) (EPROM 27C512 x 4) [controlled via GA2 /ROMCS]
0 0 0 0 x 1 0 0 x x * * * * * * * * * * * * * 0 RW SVRAM ic11 d4364 (battery backed) [controlled via GA2 /RAMCS] 0 0 0 x x 1 0 0 x x * * * * * * * * * * * * * 0 RW SVRAM ic11 d4364 (battery backed) [controlled via GA2 /RAMCS]
0 0 0 0 x 1 x 1 x x x x x x x x x x x x x x x 0 O OPEN BUS (reads as 0x2e) [may be controlled via GA2 /RAMCS?] 0 0 0 x x 1 x 1 x x x x x x x x x x x x x x x 0 O OPEN BUS (reads as 0x2e) [may be controlled via GA2 /RAMCS?]
0 0 0 0 x 1 1 0 x x x x x x x x x x x x x x x 0 O OPEN BUS (reads as 0x2e) [may be controlled via GA2 /RAMCS?] 0 0 0 x x 1 1 0 x x x x x x x x x x x x x x x 0 O OPEN BUS (reads as 0x2e) [may be controlled via GA2 /RAMCS?]
0 0 0 0 x 1 x x x x x x x x x x x x x x x x x 1 O OPEN BUS (reads as 0x80) [may be controlled via GA2 /RAMCS?] 0 0 0 x x 1 x x x x x x x x x x x x x x x x x 1 O OPEN BUS (reads as 0x80) [may be controlled via GA2 /RAMCS?]
0 0 0 1 x x x x x x x x x x x x x x x x x x x x O BUS CONFLICT (reads as random garbage, corrupted copy based on when a20 is 0, some sort of bus collision? note GA2 can't see a20 so /ROMCS and /RAMCS lines are probably active here as above)
0 0 1 x x 0 * * * * * * * * * * * * * * * * * 0 R SVROM 2 ic7 (not present on cat as sold, open bus reads as 0x2e) [controlled via GA2 /SVCS0] 0 0 1 x x 0 * * * * * * * * * * * * * * * * * 0 R SVROM 2 ic7 (not present on cat as sold, open bus reads as 0x2e) [controlled via GA2 /SVCS0]
0 0 1 x x 0 * * * * * * * * * * * * * * * * * 1 R SVROM 0 ic6 (MASK ROM tc531000) [controlled via GA2 /SVCS0] 0 0 1 x x 0 * * * * * * * * * * * * * * * * * 1 R SVROM 0 ic6 (MASK ROM tc531000) [controlled via GA2 /SVCS0]
0 0 1 x x 1 * * * * * * * * * * * * * * * * * 0 O OPEN BUS (reads as 0x2e) [controlled via GA2 /SVCS1] *SEE BELOW* 0 0 1 x x 1 * * * * * * * * * * * * * * * * * 0 O OPEN BUS (reads as 0x2e) [controlled via GA2 /SVCS1] *SEE BELOW*
@ -627,8 +661,8 @@ a23 a22 a21 a20 a19 a18 a17 a16 a15 a14 a13 a12 a11 a10 a9 a8 a7 a6 a5 a4
static ADDRESS_MAP_START(cat_mem, AS_PROGRAM, 16, cat_state) static ADDRESS_MAP_START(cat_mem, AS_PROGRAM, 16, cat_state)
ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x000000, 0x03ffff) AM_ROM AM_MIRROR(0x080000) // 256 KB ROM AM_RANGE(0x000000, 0x03ffff) AM_ROM AM_MIRROR(0x180000) // 256 KB ROM
AM_RANGE(0x040000, 0x043fff) AM_RAM AM_SHARE("svram") AM_MIRROR(0x08C000)// SRAM powered by battery AM_RANGE(0x040000, 0x043fff) AM_RAM AM_SHARE("svram") AM_MIRROR(0x18C000)// SRAM powered by battery
AM_RANGE(0x200000, 0x27ffff) AM_ROM AM_REGION("svrom",0x0000) AM_MIRROR(0x180000) // SV ROM AM_RANGE(0x200000, 0x27ffff) AM_ROM AM_REGION("svrom",0x0000) AM_MIRROR(0x180000) // SV ROM
AM_RANGE(0x400000, 0x47ffff) AM_RAM AM_SHARE("p_videoram") AM_MIRROR(0x180000) // 512 KB RAM AM_RANGE(0x400000, 0x47ffff) AM_RAM AM_SHARE("p_videoram") AM_MIRROR(0x180000) // 512 KB RAM
AM_RANGE(0x600000, 0x67ffff) AM_READWRITE(cat_2e80_r,cat_video_control_w) AM_MIRROR(0x180000) // Gate Array #1: Video AM_RANGE(0x600000, 0x67ffff) AM_READWRITE(cat_2e80_r,cat_video_control_w) AM_MIRROR(0x180000) // Gate Array #1: Video
@ -805,7 +839,9 @@ MACHINE_START_MEMBER(cat_state,cat)
MACHINE_RESET_MEMBER(cat_state,cat) MACHINE_RESET_MEMBER(cat_state,cat)
{ {
machine().device("maincpu")->execute().set_irq_acknowledge_callback(device_irq_acknowledge_delegate(FUNC(cat_state::cat_int_ack),this)); machine().device("maincpu")->execute().set_irq_acknowledge_callback(device_irq_acknowledge_delegate(FUNC(cat_state::cat_int_ack),this));
m_duart_inp = 0;
m_6ms_counter = 0; m_6ms_counter = 0;
m_floppy_control = 0;
m_keyboard_timer->adjust(attotime::zero, 0, attotime::from_hz(120)); m_keyboard_timer->adjust(attotime::zero, 0, attotime::from_hz(120));
m_6ms_timer->adjust(attotime::zero, 0, attotime::from_hz((XTAL_19_968MHz/2)/65536)); m_6ms_timer->adjust(attotime::zero, 0, attotime::from_hz((XTAL_19_968MHz/2)/65536));
} }
@ -1043,9 +1079,9 @@ ROM_START( cat )
/* Romspace here is a little strange: there are 3 rom sockets on the board: /* Romspace here is a little strange: there are 3 rom sockets on the board:
* svrom-0 maps to 200000-21ffff every ODD byte (d8-d0) * svrom-0 maps to 200000-21ffff every ODD byte (d8-d0)
* svrom-1 maps to 200000-21ffff every EVEN byte (d15-d7) * svrom-1 maps to 200000-21ffff every EVEN byte (d15-d7)
* (since no rom is in the socket; it reads as open bus 0x2E) * (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) * svrom-2 maps to 240000-25ffff every ODD byte (d8-d0)
* (since no rom is in the socket; it reads as open bus 0x80) * (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; 240000-25ffff EVEN always reads as 0x2E
* since ROM_FILL16BE(0x0, 0x80000, 0x2e80) doesn't exist, the * since ROM_FILL16BE(0x0, 0x80000, 0x2e80) doesn't exist, the
* even bytes and latter chunk of the svrom space need to be filled in * even bytes and latter chunk of the svrom space need to be filled in
@ -1060,6 +1096,19 @@ ROM_START( cat )
*/ */
ROMX_LOAD( "uv1__nh7-0684__hn62301apc11__7h1.ic6", 0x00000, 0x20000, CRC(229ca210) SHA1(564b57647a34acdd82159993a3990a412233da14), ROM_SKIP(1)) // this is a 28pin tc531000 mask rom, 128KB long; "US" SVROM ROMX_LOAD( "uv1__nh7-0684__hn62301apc11__7h1.ic6", 0x00000, 0x20000, CRC(229ca210) SHA1(564b57647a34acdd82159993a3990a412233da14), ROM_SKIP(1)) // this is a 28pin tc531000 mask rom, 128KB long; "US" SVROM
/* There is an unpopulated PAL16L8 at IC9 whose original purpose (based
* on the schematics) was probably to cause a 68k bus error when
* memory in certain ranges when accessed (likely so 'forth gone insane'
* won't destroy the contents of ram and svram).
* Its connections are (where Ix = inp on pin x, Ox = out on pin x):
* I1 = A23, I2 = A22, I3 = A2, I4 = R/W, I5 = A5, I6 = FC2, I7 = gnd,
* I8 = A1, I9 = gnd, I11 = gnd, O16 = /BERR,
* I14 = REMAP (connects to emulator 'shadow rom' board or to gnd when unused)
* Based on the inputs and outputs of this pal, almost if not the entire
* open bus and mirrored areas of the cat address space could be made
* to cause bus errors. REMAP was probably used to 'open up' the A00000-A7ffff
* shadow rom/ram area and make it writable without erroring.
*/
ROM_END ROM_END
/* Driver */ /* Driver */