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zorba keyboard updates:

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* map arrows, home/clear and break
* document two remaining DIP switches
* add more notes about MCU program behaviour
This commit is contained in:
Vas Crabb 2017-02-21 17:28:19 +11:00
parent ba8bc89a89
commit 29a3f8b488
2 changed files with 64 additions and 26 deletions
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6
src/mame/drivers/zorba.cpp
View File

@ -394,14 +394,12 @@ WRITE_LINE_MEMBER( zorba_state::busreq_w )
READ8_MEMBER(zorba_state::memory_read_byte)
{
address_space& prog_space = m_maincpu->space(AS_PROGRAM);
return prog_space.read_byte(offset);
return m_maincpu->space(AS_PROGRAM).read_byte(offset);
}
WRITE8_MEMBER(zorba_state::memory_write_byte)
{
address_space& prog_space = m_maincpu->space(AS_PROGRAM);
prog_space.write_byte(offset, data);
m_maincpu->space(AS_PROGRAM).write_byte(offset, data);
}
READ8_MEMBER(zorba_state::io_read_byte)

84
src/mame/machine/zorbakbd.cpp
View File

@ -5,9 +5,41 @@
*
* The keyboard MCU handles scanning the matrix and converting key down/
* up events to high-level characters for the host computer. The DIP
* switches are only read on startup.
* switches are only read on startup. The row select outputs are
* decoded by a 74159 so only one row can be driven at a time.
*
* TODO: the eight "holes" generate control codes, six of them are break, home and the arrows
* The keyboard has an unpopulated PCB location for the DIP switches,
* but they're unpopulated so all the switches are always off unless you
* add them or solder in wire links. The keyclick/bell beeper also
* appears to be unpopulated. The 300 Baud option is probably to allow
* the MCU program to be used with other CP/M systems (e.g. Kaypro
* expects this Baud rate).
*
* In addition to the asynchronous serial output, the program supports
* synchronous output. If enabled with DIP switches, characters are
* sent out MSB first on PB2. PB3 is pulsed low for each bit, and PB4
* is pulsed low after sending a complete byte. PB2 only changes while
* PB3 and PB4 are both high; PB4 is pulsed after the pulse on PB3 for
* the final bit. There are no delays - data is sent as fast as
* possible. Characters are still sent on the asynchronous serial
* output when synchronous output is enabled.
*
* The keyboard understands a very simple single-byte command format.
* - If the MSB of the command is set, it will run one of the diagnostic
* modes, depending on the three LSBs (same options provided by the
* three low DIP switches), and the rest of the command processing is
* skipped.
* - If bit 6 of the command is set, it will spin until it receives a
* command with bit 6 clear (diagnostic mode commands are ignored
* while in this state).
* - Bit 5 controls the keyboard bell (active high).
* - If the /INT pin is tied high, bits 0 and 1 control the Shift Lock
* and Caps Lock LEDs, respectively. Note that only the LEDs are
* affected, not the keyboard's shift/caps lock state. If /INT is
* tied low, these bits are ignored.
* - Bits 4, 3 and 2 control PB4, PB3 and PB2 (setting the bit pulls the
* output low). This is presumably used to set the state of the
* F17/F18/F19 LEDs when synchronous output is not being used.
*
* The Zorba manual describes a keyboard PROM with enough space to map
* all eight modifier combinations independently, however this keyboard
@ -16,19 +48,27 @@
* (caps lock is computed off the normal table by checking for letter
* characters).
*
* The host sets the keyboard USART to 1200 8N2. The MCU generates
* serial timings off timer interrupts. Receive synchronisation is
* acquired at four times the Baud rate (4800Hz or 1200Hz).
*
* 0 1 2 3 4 5 6 7
* 0 F1 F13 3 # KP8 i I s S KP2 , <
* 1 F2 F14 4 $ KP9 o O d D KP3 . >
* 2 F3 F15 5 % p P f F / ?
* 3 F4 F16 6 ^ [ { g G KP0
* 2 F3 F15 5 % break p P f F up / ?
* 3 F4 F16 6 ^ home [ { g G down KP0
* 4 F5 F17 7 & tab ] } h H shift KP.
* 5 F6 F18 8 * q Q KP4 j J z Z
* 6 F7 F19 9 ( w W KP5 k K x X
* 5 F6 F18 8 * q Q KP4 j J z Z left
* 6 F7 F19 9 ( w W KP5 k K x X right
* 7 F8 ~ 0 ) e E KP6 l L c C space
* 8 F9 \ | - _ r R s-lock ; : v V newline
* 9 F10 ESC = + t T ctrl ' " b B KP-
* 10 F11 1 ! del y Y c-lock return n N
* 11 F12 2 @ KP7 u U a A KP1 m M
*
* TODO: The two "holes" generate control characters, possibly soft
* capslock and shiftlock codes to be used when /INT is tied high. They
* don't correspond to physical keys on the Zorba keyboard.
*/
#include "emu.h"
#include "zorbakbd.h"
@ -63,20 +103,20 @@ INPUT_PORTS_START(zorba_keyboard)
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F3") PORT_CODE(KEYCODE_F3) PORT_CHAR(UCHAR_MAMEKEY(F3))
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F15") PORT_CODE(KEYCODE_F15) PORT_CHAR(UCHAR_MAMEKEY(F15))
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN ) // b9
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BREAK") PORT_CODE(KEYCODE_PAUSE) PORT_CHAR(UCHAR_MAMEKEY(PAUSE))
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) // b3
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
PORT_START("ROW3")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F4") PORT_CODE(KEYCODE_F4) PORT_CHAR(UCHAR_MAMEKEY(F4))
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F16") PORT_CODE(KEYCODE_F16) PORT_CHAR(UCHAR_MAMEKEY(F16))
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN ) // b7
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("HOME") PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(HOME))
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) // b4
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 0") PORT_CODE(KEYCODE_0_PAD) PORT_CHAR(UCHAR_MAMEKEY(0_PAD))
PORT_START("ROW4")
@ -97,7 +137,7 @@ INPUT_PORTS_START(zorba_keyboard)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 4") PORT_CODE(KEYCODE_4_PAD) PORT_CHAR(UCHAR_MAMEKEY(4_PAD))
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) // b5
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
PORT_START("ROW6")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F7") PORT_CODE(KEYCODE_F7) PORT_CHAR(UCHAR_MAMEKEY(F7))
@ -107,7 +147,7 @@ INPUT_PORTS_START(zorba_keyboard)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 5") PORT_CODE(KEYCODE_5_PAD) PORT_CHAR(UCHAR_MAMEKEY(5_PAD))
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) // b6
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
PORT_START("ROW7")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F8") PORT_CODE(KEYCODE_F8) PORT_CHAR(UCHAR_MAMEKEY(F8))
@ -147,7 +187,7 @@ INPUT_PORTS_START(zorba_keyboard)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CAPS LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK))
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) // e0
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) // e0/e2/e3
PORT_START("ROW11")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F12") PORT_CODE(KEYCODE_F12) PORT_CHAR(UCHAR_MAMEKEY(F12))
@ -157,7 +197,7 @@ INPUT_PORTS_START(zorba_keyboard)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 1") PORT_CODE(KEYCODE_1_PAD) PORT_CHAR(UCHAR_MAMEKEY(1_PAD))
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) // e1
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) // e1/e3/e4
PORT_START("ROW12")
PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED ) // scanned but the tables are too small so it would post garbage
@ -169,7 +209,7 @@ INPUT_PORTS_START(zorba_keyboard)
PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED ) // scanned but the tables are too small so it would post garbage
PORT_START("ROW15")
PORT_DIPNAME( 0x07, 0x07, "Diagnostic Mode" )
PORT_DIPNAME( 0x07, 0x07, "Diagnostic Mode" ) PORT_DIPLOCATION("DIP:1,2,3")
PORT_DIPSETTING( 0x07, "0 (Normal)" )
PORT_DIPSETTING( 0x06, "1 (Dump Tables)" )
PORT_DIPSETTING( 0x05, "2 (Report Revision)" )
@ -178,21 +218,21 @@ INPUT_PORTS_START(zorba_keyboard)
PORT_DIPSETTING( 0x02, "5 (Output Test)" )
PORT_DIPSETTING( 0x01, "6 (Normal)" )
PORT_DIPSETTING( 0x00, "7 (Dump Tables)" )
PORT_DIPNAME( 0x08, 0x08, "Key Repeat" )
PORT_DIPNAME( 0x08, 0x08, "Key Repeat" ) PORT_DIPLOCATION("DIP:4")
PORT_DIPSETTING( 0x08, DEF_STR(On) )
PORT_DIPSETTING( 0x00, DEF_STR(Off) )
PORT_DIPNAME( 0x10, 0x10, "Baud Rate" )
PORT_DIPNAME( 0x10, 0x10, "Baud Rate" ) PORT_DIPLOCATION("DIP:5")
PORT_DIPSETTING( 0x10, "1200" )
PORT_DIPSETTING( 0x00, "300" )
PORT_DIPNAME( 0x20, 0x20, "Key Click" )
PORT_DIPNAME( 0x20, 0x20, "Key Click" ) PORT_DIPLOCATION("DIP:6")
PORT_DIPSETTING( 0x20, DEF_STR(On) )
PORT_DIPSETTING( 0x00, DEF_STR(Off) )
PORT_DIPNAME( 0x40, 0x40, DEF_STR(Unknown) )
PORT_DIPNAME( 0x40, 0x40, "Synchronous Output" ) PORT_DIPLOCATION("DIP:7")
PORT_DIPSETTING( 0x40, DEF_STR(Off) )
PORT_DIPSETTING( 0x00, DEF_STR(On) )
PORT_DIPNAME( 0x80, 0x80, DEF_STR(Unknown) )
PORT_DIPSETTING( 0x80, DEF_STR(Off) )
PORT_DIPSETTING( 0x00, DEF_STR(On) )
PORT_DIPNAME( 0x80, 0x80, "Key Repeat Delay/Rate" ) PORT_DIPLOCATION("DIP:8")
PORT_DIPSETTING( 0x80, "0.75s/15cps" )
PORT_DIPSETTING( 0x00, "0.5s/21cps" )
INPUT_PORTS_END