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https://github.com/holub/mame
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Do away with KEYBOARD_WORKAROUND
BIOS patch is gone. Floppy drives A-D are locked by BIOS after Z80 RESPONSE FAILURE / DRIVE A (= ERROR 13), so the winchester disk remains ("W"). Good luck.
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Bavarese
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@ -4,31 +4,38 @@
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DEC Rainbow 100
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Driver-in-progress by R. Belmont and Miodrag Milanovic.
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Portions (2013 - 2015) by Karl-Ludwig Deisenhofer (Floppy, ClikClok RTC, NVRAM, DIPs, hard disk).
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Keyboard fix by Cracyc (June 2016)
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Portions (2013 - 2016) by Karl-Ludwig Deisenhofer (Floppy, ClikClok RTC, NVRAM, DIPs, hard disk).
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STATE AS OF APRIL 2015
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To unlock floppy drives A-D compile with WORKAROUND_RAINBOW_B (prevents a side effect of ERROR 13).
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Only single sided disk images with 80 tracks, 10 sectors appear to work (IMG or *.TD0 / TeleDisk).
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If problems arise, delete the NVRAM file in folder Rainbow.
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You may also want to reassign SETUP (away from F3, where it sits on a LK201).
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STATE AS OF JUNE 2016
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----------------------
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Driver is based entirely on the DEC-100 'B' variant (DEC-190 and DEC-100 A models are treated as clones).
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While this is OK for the compatible -190, it doesn't do justice to ancient '100 A' hardware.
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RBCONVERT.ZIP has details on how model 'A' differs from version B.
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RBCONVERT.ZIP documents how model 'A' differs from version B.
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Issues with this driver:
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BUGS / ISSUES
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(1) Keyboard emulation incomplete (fatal; inhibits the system from booting with ERROR 50).
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(1) LOOPBACK circuit not emulated, NMI from RAM card also unemulated (ERROR 27).
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The former is used in startup tests, the latter seems less relevant (must use menu self test "S").
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Serial ports do not work, so serial communication failure (ERROR 60) and ERROR 40 (serial
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printer interface) result. Unfortunately the BIOS tests all three serial interfaces in line.
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(2) serial ports do not work, so serial communication failure (ERROR 60) and ERROR 40 (serial
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printer interface) result.
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(2) while DOS 3 and UCSD systems (fort_sys, pas_sys) + diag disks boot, CPM 2.x and DOS 2.x die
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(3) while DOS 3 and UCSD systems (fort_sys, pas_sys) + diag disks boot, CPM 2.x and DOS 2.x die
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in secondary boot loader with a RESTORE (seek track 0) when track 2 sector 1 should be loaded.
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Writing files to floppy is next to impossible on both CPM 1.x and DOS 3 (these two OS boot
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with keyboard workarounds enabled). File deletion works, so few bytes pass.
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with new workaround enabled). File deletion works, so few bytes pass.
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(3) heavy system interaction stalls the driver. Start the RX50 diag.disk and
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see what happens (key 3 for individual tests, then select system interaction).
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(4) arbitration chip (E11; in 100-A schematics or E13 in -B) should be dumped.
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(4) system interaction tests HALT Z80 CPU at location $0211 (forever). Boot the RX50 diag.disk
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to see what happens (key 3 for individual tests, then select system interaction).
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(5) arbitration chip (E11; in 100-A schematics or E13 in -B) should be dumped.
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It is a 6308 OTP ROM (2048 bit, 256 x 8) used as a lookup table (LUT) with the address pins (A)
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used as inputs and the data pins (D) as output.
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@ -207,15 +214,10 @@ W17 pulls J1 serial port pin 1 to GND when set (chassis to logical GND).
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// ---------------------------------------------------------------------------
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// WORKAROUNDS:
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// (1) FORCE LOGO: - not valid for 100-A ROM -
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//#define FORCE_RAINBOW_B_LOGO
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// (2) KEYBOARD_WORKAROUND : also requires FORCE...LOGO (and preliminary headers)
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//#define KEYBOARD_WORKAROUND
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//#define KBD_DELAY 8 // (debounce delay)
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// - tested only in conjunction with 100-B ROM -
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//#define WORKAROUND_RAINBOW_B
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// ---------------------------------------------------------------------------
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// Define standard and maximum RAM sizes (A, then B model):
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//#define BOARD_RAM 0x0ffff // 64 K base RAM (100-A)
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//#define END_OF_RAM 0xcffff // very last byte (100-A) DO NOT CHANGE.
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@ -261,11 +263,6 @@ public:
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rainbow_state(const machine_config &mconfig, device_type type, const char *tag) :
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driver_device(mconfig, type, tag),
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#ifdef KEYBOARD_WORKAROUND
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#include "./m_kbd1.c"
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#endif
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m_inp1(*this, "W13"),
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m_inp2(*this, "W14"),
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m_inp3(*this, "W15"),
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@ -365,10 +362,6 @@ public:
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DECLARE_READ8_MEMBER(rtc_w);
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#ifdef KEYBOARD_WORKAROUND
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#include "./port9x_Ax.c"
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#endif
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UINT32 screen_update_rainbow(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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INTERRUPT_GEN_MEMBER(vblank_irq);
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@ -395,11 +388,6 @@ private:
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IRQ_8088_NMI // 02/02 08/08 - [external MEMORY EXTENSION] - PARITY ERROR L
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}; // HIGHEST PRIORITY
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#ifdef KEYBOARD_WORKAROUND
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#include "./m_kbd2.c"
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#endif
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required_ioport m_inp1;
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required_ioport m_inp2;
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required_ioport m_inp3;
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@ -516,40 +504,13 @@ void rainbow_state::machine_start()
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save_item(NAME(m_irq_high));
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save_item(NAME(m_irq_mask));
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#ifdef FORCE_RAINBOW_B_LOGO
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#ifdef WORKAROUND_RAINBOW_B
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UINT8 *rom = memregion("maincpu")->base();
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rom[0xf4000 + 0x364a] = 2 + 8; // 2 :set ; 4 : reset, 8 : set for 0xf4363 ( 0363 WAIT_FOR_BIT3__loc_35E )
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rom[0xf4000 + 0x0363] = 0x90;
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rom[0xf4000 + 0x0364] = 0x90;
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// If bit 2 = 1 (Efff9), then a keyboard powerup is necessary (=> will lock up in current state)
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rom[0xf4000 + 0x3638] = 0x80; // OR instead of TEST
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rom[0xf4000 + 0x3639] = 0x0f; // OR instead of TEST
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rom[0xf4000 + 0x363a] = 0x08; // 04 => 08
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rom[0xf4000 + 0x363b] = 0xeb; // COND => JMPS
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if (rom[0xf4174] == 0x75)
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if (rom[0xf4000 + 0x3ffc] == 0x31) // 100-B (5.01) 0x35 would test for V5.05
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{
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rom[0xf4174] = 0xeb; // jmps RAINBOW100_LOGO__loc_33D
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rom[0xf4175] = 0x08;
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rom[0xf4000 + 0x0303] = 0x00; // disable CRC check
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rom[0xf4000 + 0x135e] = 0x00; // FLOPPY / RX-50 WORKAROUND: in case of Z80 RESPONSE FAILURE ($80 bit set in AL), do not block floppy access.
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}
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if (rom[0xf4000 + 0x3ffc] == 0x31) // 100-B
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rom[0xf4384] = 0xeb; // JMPS => BOOT80
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if (rom[0xf4000 + 0x3ffc] == 0x35) // v5.05
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rom[0xf437b] = 0xeb;
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//TEST-DEBUG: always reset NVM to defaults (!)
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//rom[0x3d6c] = 0x90;
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//rom[0x3d6d] = 0x90;
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#endif
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#ifdef KEYBOARD_WORKAROUND
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#include "./rainbow_keyboard0.c"
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#endif
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}
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@ -681,12 +642,6 @@ AM_RANGE(0x69, 0x69) AM_READ(hd_status_69_r)
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// ===========================================================
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// 0x10c
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AM_RANGE(0x10c, 0x10c) AM_DEVWRITE("vt100_video", rainbow_video_device, dc012_w)
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#ifdef KEYBOARD_WORKAROUND
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#include "./am_range_9x_Ax.c"
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#endif
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ADDRESS_MAP_END
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static ADDRESS_MAP_START(rainbowz80_mem, AS_PROGRAM, 8, rainbow_state)
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@ -716,9 +671,6 @@ ADDRESS_MAP_END
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/* DIP switches */
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static INPUT_PORTS_START(rainbow100b_in)
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#ifdef KEYBOARD_WORKAROUND
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#include "./rainbow_ipt.c"
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#endif
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PORT_START("MONITOR TYPE")
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PORT_DIPNAME(0x03, 0x03, "MONOCHROME MONITOR")
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PORT_DIPSETTING(0x01, "WHITE")
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@ -926,10 +878,6 @@ void rainbow_state::machine_reset()
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m_irq_mask = 0;
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}
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#ifdef KEYBOARD_WORKAROUND
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#include "./rainbow_keyboard2.c"
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#endif
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UINT32 rainbow_state::screen_update_rainbow(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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/*
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@ -956,7 +904,7 @@ void rainbow_state::update_8088_irqs()
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if (m_irq_mask != 0)
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{
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for (int i = 0; i < IRQ_8088_NMI; i++)
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for (int i = IRQ_8088_NMI; i >= 0; i--)
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{
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if (m_irq_mask & (1 << i))
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{
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@ -1664,21 +1612,6 @@ WRITE_LINE_MEMBER(rainbow_state::bundle_irq)
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READ8_MEMBER(rainbow_state::system_parameter_r)
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{
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#ifdef FORCE_RAINBOW_B_LOGO
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// WORKAROUND: Initialize NVRAM + VOLATILE RAM with DEFAULTS + correct RAM SIZE !
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int test = (m_inp8->read() >> 16) - 2; // 0 = 128 K (!)
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if (test >= 0)
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{
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m_p_vol_ram[0xdb] = test;
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m_p_nvram[0xdb] = test;
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}
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// NVRAM @ 0x89 : AUTO RPT(0 = OFF 1 = ON)
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m_p_nvram[0x89] = 0; // AUTO REPEAT ON (1 would be DETRIMENTAL TO "SET-UP" (80/132 + 50/60 Hz) with KEYBOARD_WORKAROUND (!)
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#endif
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/* Info about option boards is in bits 0 - 3:
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SYSTEM PARAMETER INFORMATION: see AA-P308A-TV page 92 section 14.0
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Bundle card (1) | Floppy (2) | Graphics (4) | Memory option (8)
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@ -2179,16 +2112,10 @@ WRITE8_MEMBER(rainbow_state::diagnostic_w) // 8088 (port 0A WRITTEN). Fig.4-28 +
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// KEYBOARD
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void rainbow_state::update_kbd_irq()
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{
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#ifndef KEYBOARD_WORKAROUND
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if ((m_kbd_rx_ready) || (m_kbd_tx_ready))
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{
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raise_8088_irq(IRQ_8088_KBD);
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}
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else
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{
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lower_8088_irq(IRQ_8088_KBD);
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}
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#endif
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}
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WRITE_LINE_MEMBER(rainbow_state::kbd_tx)
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