From 121359ecbca70ad940731af021a17631f4030ea1 Mon Sep 17 00:00:00 2001 From: Scott Stone Date: Sun, 27 Apr 2014 17:42:42 +0000 Subject: (MESS) RAINBOW.C: IRQ priorities updated. Board revisions and add-on cards documented; rainbow100 renamed to rainbow100a. [Bavarese] --- src/mess/drivers/rainbow.c | 156 +++++++++++++++++++++++++++---------------- src/mess/machine/dec_lk201.c | 6 +- src/mess/mess.lst | 2 +- src/mess/video/vtvideo.c | 1 + 4 files changed, 104 insertions(+), 61 deletions(-) (limited to 'src/mess') diff --git a/src/mess/drivers/rainbow.c b/src/mess/drivers/rainbow.c index 603fb837859..052be9d847d 100644 --- a/src/mess/drivers/rainbow.c +++ b/src/mess/drivers/rainbow.c @@ -2,16 +2,16 @@ DEC Rainbow 100 Driver-in-progress by R. Belmont and Miodrag Milanovic. - Portions (2013-2014) by Karl-Ludwig Deisenhofer (VT video, preliminary floppy, keyboard, DIP switches). + Portions (2013-2014) by Karl-Ludwig Deisenhofer (VT attributes, preliminary floppy, keyboard, DIP switches). - STATE AS OF MARCH 2014 + STATE AS OF APRIL 2014 ---------------------- Driver is based entirely on the DEC-100 'B' variant (DEC-190 and DEC-100 A models are treated as clones). While this is OK for the compatible -190, it doesn't do justice to ancient '100 A' hardware. Currently, there are 2 showstoppers: (1) IRQ logic for 100-B needs further work (text in RBCONVERT.ZIP has details concerning -A versus -B) - (2) Keyboard emulation incomplete (inhibits the system from booting with ERROR 50 on cold or ERROR 13 on warm boot). + (2) Keyboard emulation incomplete (inhibits the system from booting with ERROR 50). - FLOPPY TIMING: 'wd17xx_complete_command' * must * be hard wired to about 13 usecs. Line 1063 in 'wd17xx.c' has to be changed (until legacy code here is removed): @@ -21,24 +21,35 @@ - NOT WORKING: serial (ERROR 60). - NOT WORKING: printer interface (ERROR 40). Like error 60 not mission-critical. - - NON-CRITICAL: watchdog logic (triggered after 108 ms without interrupts on original machine) still does not work as intended. + - NON-CRITICAL: watchdog logic ('MHFU' triggered after 108 ms without interrupts on original machine) does not work. + The timer is reset by TWO sources: the VERT INT L from the DC012, or the MHFU ENB L from the enable flip-flop. + MHFU gets active if the 8088 has not acknowledged a video processor interrupt within approx. 108 milliseconds - Timer is reset by TWO sources: the VERT INT L from the DC012, or the MHFU ENB L from the enable flip-flop. - The MHFU gets active if the 8088 has not acknowledged a video processor interrupt within approx. 108 milliseconds. - - BIOS assumes a power-up reset if MHFU detection is disabled - and assumes a MHFU reset if MHFU detection is ENABLED. - - As there is no reset switch, only a limited software reset exists on a real DEC-100 (CTRL-SETUP within SETUP). + - FIXME: warm boot triggers ERROR 16 (watchdog). BIOS assumes proper power-up only if MHFU detection is _disabled_ + Apart from power-cycling, Ctrl-Setup (within SETUP) appears to be the only way to reboot the DEC-100. - TO BE IMPLEMENTED AS SLOT DEVICES (for now, DIP settings affect 'system_parameter_r' only and are disabled): - * Color graphics option (uses NEC upd7220 GDC) - * Extended communication option (same as BUNDLE_OPTION ?) + * Color graphics option (uses NEC upd7220 GDC). REFERENCE: Programmer's Reference: AA-AE36A-TV. + Either 384 x 240 x 16 or 800 x 240 x 4 colors (out of 4096). 8 × 64 K video RAM. Pallette limited to 4 colors on 100-A. + + * Extended communication option (1 of 4 possible BUNDLE_OPTIONs) REFERENCE: AA-V172A-TV + Addendum AV-Y890A-TV. + See also NEWCOM1.DOC in RBETECDOC.ZIP. Board connected to the front rightmost expansion slot (1 of the expansion + ports used by the hard disk controller). Thus can't be added to a system that includes the DEC RD50/51. + => 2 ports, a high-speed RS-422 half-duplex interface (port A) + lower-speed RS-423 full/half-duplex interface + with modem control (port B). A DMA mode allowed high-speed transfer of data into and out of the Rainbow's memory. - OTHER HARDWARE UPGRADES: - * Suitable Solutions ClikClok (real time clock) + * Suitable Solutions ClikClok (battery backed real time clock) + Plugs into the NVM chip socket on a 100-A and into the Boot ROM on the 100-B (there is a socket + on the ClikClok for the NVM / ROM chip). Came with software for 'all versions of MS-DOS'. + + * 8087 Numerical Data Coprocessor daughterboard. REFERENCE: EK-PCNDP-IN-PRE + Daughterboard, to be plugged into the expansion port where the memory expansion card usually sits. + If a memory adapter board is present, it has to be plugged into a connector atop the 8087 copro board. + The 8088 is put into the CPU socket on the coprocessor board. * Suitable Solutions TURBOW286: 12 Mhz, 68-pin, low power AMD N80L286-12 and WAYLAND/EDSUN EL286-88-10-B ( 80286 to 8088 Processor Signal Converter ) - plus DC 7174 or DT 7174 (barely readable). Add-on card, replaces main 8088 cpu (via ribbon cable). Altered BOOT ROM labeled 'TBSS1.3 - 3ED4'. + plus DC 7174 or DT 7174 (barely readable). Add-on card, replaces main 8088 cpu (via ribbon cable). Patched 5.0x BOOT ROM labeled 'TBSS1.3 - 3ED4'. * NEC_V20 (requires modded BOOT ROM because of - at least 2 - hard coded timing loops): 100A: 100B/100+: 100B+ ALTERNATE RECOMMENDATION (fixes RAM size auto-detection problems when V20 is in place. @@ -184,8 +195,8 @@ W17 pulls J1 serial port pin 1 to GND when set (chassis to logical GND). // EK-PC100-PS-002 (APPENDIX B.2.2); pc100ps2.pdf -// Workaround DOES NOT APPLY to the 190-B ROM. Only enable when compiling the 'rainbow' driver - -//#define FORCE_RAINBOW_100_LOGO +// Workaround not valid for 100-A - +//#define FORCE_RAINBOW_B_LOGO #include "emu.h" #include "cpu/i86/i86.h" @@ -283,10 +294,14 @@ protected: private: enum { - IRQ_8088_MAILBOX = 0, // vector 0x27/a7 - IRQ_8088_VBL, // vector 0x20/a0 - IRQ_8088_KBD, // vector 0x26/a6 - + IRQ_8088_MAILBOX = 0, // vector 0x27/a7 (lowest priority) + IRQ_8088_KBD, // vector 0x26/a6 KEYBOARD (8251A) Interrupt +// IRQ_EXT_COMM, // vector 0x25 [OPTION BOARD] Interrupt from external COMM.BOARD (non DMA) +// IRQ_COMM_PRN_7201, // vector 0x24 COMM./PRINTER (7201) IRQ +// IRQ_EXT_DMAC, // vector 0x23 [OPTION BOARD] : from external COMM.BOARD (DMA Control IRQ) +// IRQ_GRF, // vector 0x22 GRAPHICS IRQ +// IRQ_SH_10_BDL, // vector 0x21 BUNDLE IRQ (hard disc / COMM.BOARD) : Pin 23 of expansion connector J4 + IRQ_8088_VBL, // vector 0x20/a0 (highest priority) IRQ_8088_MAX }; @@ -368,14 +383,19 @@ void rainbow_state::machine_start() save_item(NAME(m_irq_high)); save_item(NAME(m_irq_mask)); -#ifdef FORCE_RAINBOW_100_LOGO +#ifdef FORCE_RAINBOW_B_LOGO UINT8 *rom = memregion("maincpu")->base(); - rom[0xf4174]=0xeb; // jmps RAINBOW100_LOGO__loc_33D - rom[0xf4175]=0x08; + if (rom[0xf4174] == 0x75) + { rom[0xf4174] = 0xeb; // jmps RAINBOW100_LOGO__loc_33D + rom[0xf4175] = 0x08; + } + + if (rom[0xf4000 + 0x3ffc] == 0x31) // 100-B + rom[0xf4384] = 0xeb; // JMPS => BOOT80 - rom[0xf4000 + 0x364a]= 0x0a; - rom[0xf4384]=0xeb; // JMPS => BOOT80 + if (rom[0xf4000 + 0x3ffc] == 0x35) // v5.05 + rom[0xf437b] = 0xeb; #endif } @@ -411,7 +431,6 @@ static ADDRESS_MAP_START( rainbow8088_io , AS_IO, 8, rainbow_state) // 0x02 Communication status / control register (8088) AM_RANGE (0x02, 0x02) AM_READWRITE(comm_control_r, comm_control_w) - // 0x04 Video processor DC011 AM_RANGE (0x04, 0x04) AM_DEVWRITE("vt100_video", rainbow_video_device, dc011_w) // TODO: unmapped [06] : Communication bit rates (see page 21 of PC 100 SPEC) @@ -420,7 +439,6 @@ static ADDRESS_MAP_START( rainbow8088_io , AS_IO, 8, rainbow_state) AM_RANGE (0x0a, 0x0a) AM_READWRITE(diagnostic_r, diagnostic_w) - // 0x0C Video processor DC012 AM_RANGE (0x0c, 0x0c) AM_DEVWRITE("vt100_video", rainbow_video_device, dc012_w) // TODO: unmapped [0e] : PRINTER BIT RATE REGISTER (WO) @@ -429,22 +447,41 @@ static ADDRESS_MAP_START( rainbow8088_io , AS_IO, 8, rainbow_state) AM_RANGE(0x11, 0x11) AM_DEVREADWRITE("kbdser", i8251_device, status_r, control_w) // UNMAPPED: - // 0x20 - 0x2f ***** EXTENDED COMM. OPTION (option select 1)- for example: - // 0x27 (RESET EXTENDED COMM OPTION) - OUT 27 @ offset 1EA7 - - // 0x40 COMMUNICATIONS DATA REGISTER (MPSC) + // 0x20 - 0x2f ***** EXTENDED COMM. OPTION (option select 1) + // 0x27 (RESET EXTENDED COMM OPTION - - see boot ROM @1EA6) + // =========================================================== + // 0x40 COMMUNICATIONS DATA REGISTER (MPSC) // 0x41 PRINTER DATA REGISTER (MPSC) // 0x42 COMMUNICATIONS CONTROL / STATUS REGISTER (MPSC) // 0x43 PRINTER CONTROL / STATUS REGISTER (MPSC) + // =========================================================== + // 0x50 - 0x57 ***** COLOR GRAPHICS OPTION: + // 50h Graphics option software reset. Any write to this + // port also resynchronizes the read/modify/write memory + // cycles of the Graphics Option to those of the GDC (*) + // * see boot ROM @1EB4/8 + // 51h Data written to this port is loaded into the area + // selected by the previous write to port 53h. + + // 52h Data written to this port is loaded into the Write Buffer. - // 0x50 - 0xf ***** OPTIONAL COLOR GRAPHICS - for example: - // 0x50 (RESET_GRAPH. OPTION) - OUT 50 @ offsets F5EB5 + F5EB9 + // 53h Data written to this port provides address selection + // for indirect addressing (see Indirect Register). + // 54h Data written to this port is loaded into the low-order + // byte of the Write Mask. + + // 55h Data written to this port is loaded into the high-order + // byte of the Write Mask. + + // 56h Data written to this port is loaded into the GDC's FIFO + // Buffer and flagged as a parameter. // =========================================================== // TODO: hard disc emulation! // ------ Rainbow uses 'WD 1010 AL' (Western Digital 1983) // Register compatible to WD2010 (present in MESS) // R/W REGISTERS 60 - 68 (?) + AM_RANGE (0x68, 0x68) AM_READ(hd_status_68_r) // =========================================================== // HARD DISC SIZES AND LIMITS // HARDWARE: @@ -455,7 +492,6 @@ static ADDRESS_MAP_START( rainbow8088_io , AS_IO, 8, rainbow_state) // SOFTWARE: // - MS-DOS 2 allows a maximum partition size of 16 MB (sizes > 15 MB are incompatible to DOS 3) // - MS-DOS 3 has a global 1024 cylinder limit (32 MB). - AM_RANGE (0x68, 0x68) AM_READ(hd_status_68_r) ADDRESS_MAP_END static ADDRESS_MAP_START(rainbowz80_mem, AS_PROGRAM, 8, rainbow_state) @@ -490,7 +526,7 @@ static INPUT_PORTS_START( rainbow100b_in ) PORT_START("MEMORY PRESENT") PORT_DIPNAME( 0xF0000, 0x20000, "MEMORY PRESENT") PORT_DIPSETTING( 0x10000, "64 K (MINIMUM ON 100-A)" ) // see BOARD_RAM - PORT_DIPSETTING( 0x20000, "128 K (MINIMUM ON 100-B)" ) + PORT_DIPSETTING( 0x20000, "128 K (MINIMUM ON 100-B)" ) PORT_DIPSETTING( 0x30000, "192 K (MEMORY OPTION)" ) PORT_DIPSETTING( 0x40000, "256 K (MEMORY OPTION)" ) PORT_DIPSETTING( 0x50000, "320 K (MEMORY OPTION)" ) @@ -507,8 +543,11 @@ static INPUT_PORTS_START( rainbow100b_in ) // Floppy is always 'on', BUNDLE + GRAPHICS are not implemented yet: PORT_START("FLOPPY CONTROLLER") PORT_DIPNAME( 0x01, 0x01, "FLOPPY CONTROLLER") PORT_TOGGLE - PORT_DIPSETTING( 0x01, DEF_STR( On ) ) + PORT_DIPSETTING( 0x01, DEF_STR( On ) ) + // BUNDLE_OPTION: COMM.card or hard disc controller extension (marketed later). + // NOTES: - hard disc and COMM.extension exclude each other. + // - connector J4 has 4 select lines. Select option 1 = COMM CARD ? PORT_START("BUNDLE OPTION") PORT_DIPNAME( 0x00, 0x00, "BUNDLE OPTION") PORT_TOGGLE PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) @@ -518,9 +557,9 @@ static INPUT_PORTS_START( rainbow100b_in ) PORT_DIPNAME( 0x00, 0x00, "GRAPHICS OPTION") PORT_TOGGLE PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x01, DEF_STR( On ) ) - + // W13 - W18 are used for factory tests and affect the boot process - - PORT_START("W13") + PORT_START("W13") PORT_DIPNAME( 0x02, 0x02, "W13 (FACTORY TEST A, LEAVE OFF)") PORT_TOGGLE PORT_DIPSETTING( 0x02, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) @@ -569,7 +608,7 @@ void rainbow_state::machine_reset() { /* configure RAM */ address_space &program = m_maincpu->space(AS_PROGRAM); - if (m_inp8->read() < END_OF_RAM) + if (m_inp8->read() < END_OF_RAM) { program.unmap_readwrite(m_inp8->read(), END_OF_RAM); } @@ -628,10 +667,10 @@ UINT32 rainbow_state::screen_update_rainbow(screen_device &screen, bitmap_ind16 return 0; } -// interrupt handling and arbitration. priorities currently unknown. +// Interrupt handling and arbitration. See 3.1.3.8 OF PC-100 spec. void rainbow_state::update_8088_irqs() { - static const int vectors[] = { 0x27, 0x20, 0x26 }; + static const int vectors[] = { 0x27, 0x26, 0x20 }; if (m_irq_mask != 0) { @@ -732,16 +771,17 @@ READ8_MEMBER(rainbow_state::hd_status_68_r) READ8_MEMBER(rainbow_state::system_parameter_r) { /* Info about option boards is in bits 0 - 3: + SYSTEM PARAMETER INFORMATION: see AA-P308A-TV page 92 section 14.0 Bundle card (1) | Floppy (2) | Graphics (4) | Memory option (8) - 0 1 2 3 4 5 6 7 B F G M - ( 1 means NOT present ) + ( 1 means NOT present; 4-7 reserved ) */ - return (((m_inp5->read() == 1) ? 0 : 1) | + return ( ((m_inp5->read() == 1) ? 0 : 1) | ((m_inp6->read() == 1) ? 0 : 2) | ((m_inp7->read() == 1) ? 0 : 4) | - ((m_inp8->read() > BOARD_RAM) ? 0 : 8) + ((m_inp8->read() > BOARD_RAM) ? 0 : 8) | + 16 | 32 | 64 | 128 // to be verified. ); } @@ -1007,7 +1047,9 @@ WRITE_LINE_MEMBER( rainbow_state::clear_video_interrupt ) lower_8088_irq(IRQ_8088_VBL); } -READ8_MEMBER( rainbow_state::diagnostic_r ) + + +READ8_MEMBER( rainbow_state::diagnostic_r ) // 8088 (port 0A READ). Fig.4-29 + table 4-15 { // printf("%02x DIP value ORed to diagnostic\n", ( m_inp1->read() | m_inp2->read() | m_inp3->read() ) ); @@ -1018,7 +1060,7 @@ READ8_MEMBER( rainbow_state::diagnostic_r ) ); } -WRITE8_MEMBER( rainbow_state::diagnostic_w ) +WRITE8_MEMBER( rainbow_state::diagnostic_w ) // 8088 (port 0A WRITTEN). Fig.4-28 + table 4-15 { // printf("%02x to diag port (PC=%x)\n", data, space.device().safe_pc()); m_SCREEN_BLANK = (data & 2) ? false : true; @@ -1058,7 +1100,6 @@ WRITE8_MEMBER( rainbow_state::diagnostic_w ) // reset device when going from high to low, // restore command when going from low to high : m_fdc->mr_w((data & 1) ? 1 : 0); - m_diagnostic = data; } @@ -1076,7 +1117,6 @@ void rainbow_state::update_kbd_irq() } } - WRITE_LINE_MEMBER(rainbow_state::kbd_tx) { // printf("%02x to keyboard\n", state); @@ -1225,7 +1265,8 @@ static MACHINE_CONFIG_START( rainbow, rainbow_state ) MCFG_NVRAM_ADD_0FILL("nvram") MACHINE_CONFIG_END -// 'Rainbow 100-A' (introduced May 1982) is first-generation hardware with ROM 04.03.11 +// 'Rainbow 100-A' (system module 70-19974-00, PSU H7842-A) +// - first generation hardware (introduced May '82) with ROM 04.03.11 // - 64 K base RAM on board (instead of 128 K on 'B' model). 832 K RAM max. // - inability to boot from hard disc (mind the inadequate PSU) // - cannot control bit 7 of IRQ vector (prevents DOS >= 2.05 from booting on unmodified hardware) @@ -1234,7 +1275,7 @@ MACHINE_CONFIG_END // FIXME: 12-19606-02 and 12-19678-04 are just PART NUMBERS from the 100-A field manual. // Someone who knows the DEC naming conventions should correct them - -ROM_START( rainbow100 ) +ROM_START( rainbow100a ) ROM_REGION(0x100000,"maincpu", 0) ROM_LOAD( "12-19606-02a.bin", 0xFA000, 0x2000, NO_DUMP) // ROM (FA000-FBFFF) (E89) 8 K ROM_LOAD( "12-19606-02b.bin", 0xFC000, 0x2000, NO_DUMP) // ROM (FC000-FDFFF) (E90) 8 K @@ -1244,7 +1285,10 @@ ROM_START( rainbow100 ) ROM_LOAD( "chargen.bin", 0x0000, 0x1000, CRC(1685e452) SHA1(bc299ff1cb74afcededf1a7beb9001188fdcf02f)) ROM_END -// ROM definition for 100-B (different revisions built until ~ May 1986; see MP-01491-00) +// ROM definition for 100-B (system module 70-1994-02, PSU H7842-D) +// Built until ~ May 1986 (see MP-01491-00) +// - 32 K ROM (version 5.03) +// - 128 K base and 896 K max. mem. ROM_START( rainbow ) ROM_REGION(0x100000,"maincpu", 0) ROM_LOAD( "23-022e5-00.bin", 0xf0000, 0x4000, CRC(9d1332b4) SHA1(736306d2a36bd44f95a39b36ebbab211cc8fea6e)) @@ -1262,11 +1306,9 @@ ROM_END // 'Rainbow 190 B' (announced March 1985) is identical to 100-B, with alternate ROM v5.05. // According to an article in Wall Street Journal it came with a 10 MB HD and 640 K RAM. -// We have no version history. The BOOT 2.4 README reveals 'recent ROM changes for MASS 11' -// in January 1985. These were not present in the older version 04.03.11 (for PC-100-A) -// and also not in version 05.03 (from PC-100B / PC100B+). +// CHANGES: the 'Boot 2.4' manual mentions 'recent ROM changes for MASS 11' in January 1985. +// Older ROMs like 04.03.11 (for PC-100-A) or 05.03 (100-B) obviously do not incorporate these. -// A first glance: // => jump tables (F4000-F40083 and FC000-FC004D) were not extended. // => absolute addresses of some internal routines have changed. // => programs that do not rely on specific ROM versions should be compatible. @@ -1287,6 +1329,6 @@ ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT STATE INIT COMPANY FULLNAME FLAGS */ -COMP( 1982, rainbow100 , rainbow, 0, rainbow, rainbow100b_in, driver_device, 0, "Digital Equipment Corporation", "Rainbow 100-A", GAME_IS_SKELETON ) +COMP( 1982, rainbow100a , rainbow, 0, rainbow, rainbow100b_in, driver_device, 0, "Digital Equipment Corporation", "Rainbow 100-A", GAME_IS_SKELETON ) COMP( 1983, rainbow , 0 , 0, rainbow, rainbow100b_in, driver_device, 0, "Digital Equipment Corporation", "Rainbow 100-B", GAME_NOT_WORKING | GAME_IMPERFECT_COLORS) COMP( 1985, rainbow190 , rainbow, 0, rainbow, rainbow100b_in, driver_device, 0, "Digital Equipment Corporation", "Rainbow 190-B", GAME_NOT_WORKING | GAME_IMPERFECT_COLORS) diff --git a/src/mess/machine/dec_lk201.c b/src/mess/machine/dec_lk201.c index 33868969137..3889d3e553a 100644 --- a/src/mess/machine/dec_lk201.c +++ b/src/mess/machine/dec_lk201.c @@ -18,7 +18,7 @@ to => PORT 0 @ KBD controller. ________|D7 |D6 |D5 |D4 |D3 |D2 |D1 |D0 -..KBD17:|[R] |F19 |[R] |F20|PF4|N--- N,| Enter +..KBD17:|[R] |F19 |[R] |F20|PF4|N- | N,| Enter ........| | | | | | NOTE1) ........| |G22 | |G23|E23|D23|C23| A23 --------|----|----|----|---|---|---|---|--- @@ -89,7 +89,7 @@ ________|D7 |D6 |D5 |D4 |D3 |D2 |D1 |D0 --- [R] = Reserved - NOTE 1) N0--N9, N---, N and N. refer to numeric keypad + NOTE 1) N0-N9, N-, N. and N, refer to numeric keypad NOTE 2) N0 can be divided into 2 keys. Normally only the N0 keyswitch is implemented as a double-sized key. NOTE 3) Return key occupies 2 positions that are @@ -429,7 +429,7 @@ INPUT_PORTS_START( lk201 ) PORT_START("KBD17") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER_PAD) PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Num ,") PORT_CODE(KEYCODE_PLUS_PAD) - PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Num -") // duplicate...see KBD13 + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) // PORT_NAME("Num -") = duplicate...see KBD13 PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("PF4") PORT_CODE(KEYCODE_MINUS_PAD) PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("F20") PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNUSED ) diff --git a/src/mess/mess.lst b/src/mess/mess.lst index 16aaf9a5f3e..311912fadd7 100644 --- a/src/mess/mess.lst +++ b/src/mess/mess.lst @@ -1465,7 +1465,7 @@ vt520 // 1994 Digital Equipment Corporation vk100 // 1980 Digital Equipment Corporation dectalk // 1982 Digital Equipment Corporation mc7105 // Elektronika MC7105 -rainbow100 // 1982 DEC Rainbow 100-A +rainbow100a // 1982 DEC Rainbow 100-A rainbow // 1983 DEC Rainbow 100-B rainbow190 // 1985 DEC Rainbow 190 diff --git a/src/mess/video/vtvideo.c b/src/mess/video/vtvideo.c index 3af930ec0ef..fcd11257b85 100644 --- a/src/mess/video/vtvideo.c +++ b/src/mess/video/vtvideo.c @@ -191,6 +191,7 @@ READ8_MEMBER( vt100_video_device::lba7_r ) WRITE8_MEMBER( vt100_video_device::dc012_w ) { // TODO: writes to 10C/0C should be treated differently (emulation disables the watchdog too often). + // - see 3.1.3.9.5 DC012 Programming Information (PC-100 spec) if (data == 0) // MHFU is disabled by writing 00 to port 010C. { //if (MHFU_FLAG == true) -- cgit v1.2.3