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// license:BSD-3-Clause
// copyright-holders:fenugrec
/******************************************************************************
* HP 3478A Digital Multimeter
*
* Emulating test equipment is not very meaningful except for developping ROM patches.
* This aims to be the minimal emulation sufficient to run the UI (keypad and display).
* Ideally, faking ADC readings could be useful too.
*
* Some of this will probably be applicable to HP 3468A units too.
*
* Current status : runs, AD LINK ERROR on stock ROM due to unimplemented AD link
* - patching the AD comms, we get to a mostly functional state (for patch examples,
* see https://github.com/fenugrec/hp3478a_rompatch )
*
* TODO
* - split out LCD driver code. It seems common to other HP equipment of the
* era, such as the 3468, 3457, 3488?, 4263?, 6623?, and probably others.
*
* TODO next level
* * do something for analog CPU serial link (not quite uart), or dump+emulate CPU
* * better display render and layout (annunciators + show button subtext)
*
* TODO level 9000
* * Connect this with the existing i8291.cpp driver
* * dump + add analog CPU (8049)
* * validate one single chipselect active when doing external access (movx)
**** Hardware details (refer to service manual for schematics)
Main CPU : i8039 , no internal ROM
Analog (floating) CPU : i8049, internal ROM (never dumped ?)
ROM : 2764 (64kbit, org 8kB)
RAM : 5101 , 256 * 4bit (!), battery-backed calibration data
GPIB: i8291
Display : unknown; similar protocol for HP 3457A documented on
http://www.eevblog.com/forum/projects/led-display-for-hp-3457a-multimeter-i-did-it-)/25/
Main cpu I/O ports:
Port1
P14-P17 : keypad out (cols)
P10-P13 : keypad in (rows)
P20 : disp.clk1
P21 : !CS for GPIB, and disp.IWA
P22 : !CS for DIPswitch; disp.ISA (for instructions)
P23 = !OE for RAM ; disp.sync (enable instruction)
P24 = disp.PWO (enable)
P25 = disp.clk2
P26 : address bit12 ! (0x1000) => hardware banking
P27 : data out thru isol, to analog CPU
T1 : data in thru isol, from analog CPU (opcodes jt1 / jnt1)
*/
#include "emu.h"
#include "cpu/mcs48/mcs48.h"
#include "machine/bankdev.h"
#include "machine/nvram.h"
#include "machine/watchdog.h"
#include "hp3478a.lh"
#define CPU_CLOCK XTAL(5'856'000)
/* port pin/bit defs. Would be nice if mcs48.h had these */
#define P20 (1 << 0)
#define P21 (1 << 1)
#define P22 (1 << 2)
#define P23 (1 << 3)
#define P24 (1 << 4)
#define P25 (1 << 5)
#define P26 (1 << 6)
#define P27 (1 << 7)
#define A12_PIN P26
#define CALRAM_CS P23
#define DIPSWITCH_CS P22
#define GPIB_CS P21
#define DISP_PWO P24
#define DISP_SYNC P23
#define DISP_ISA P22
#define DISP_IWA P21
#define DISP_CK1 P20
//don't care about CK2 since it's supposed to be a delayed copy of CK1
#define DISP_MASK (DISP_PWO | DISP_SYNC | DISP_ISA | DISP_IWA | DISP_CK1) //used for edge detection
// IO banking : indexes of m_iobank maps
#define CALRAM_ENTRY 0
#define GPIB_ENTRY 1
#define DIP_ENTRY 2
/**** optional debug outputs, must be before #include logmacro.*/
#define DEBUG_PORTS (LOG_GENERAL << 1)
#define DEBUG_BANKING (LOG_GENERAL << 2)
#define DEBUG_BUS (LOG_GENERAL << 3) //not used after all
#define DEBUG_KEYPAD (LOG_GENERAL << 4)
#define DEBUG_LCD (LOG_GENERAL << 5) //low level
#define DEBUG_LCD2 (LOG_GENERAL << 6)
#define DEBUG_CAL (LOG_GENERAL << 7)
#define VERBOSE (DEBUG_BUS) //can be combined, like (DEBUG_CAL | DEBUG_KEYPAD)
#include "logmacro.h"
/**** HP 3478A class **/
class hp3478a_state : public driver_device
{
public:
hp3478a_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_nvram(*this, "nvram")
, m_nvram_raw(*this, "nvram")
, m_watchdog(*this, "watchdog")
, m_bank0(*this, "bank0")
, m_iobank(*this, "iobank")
, m_keypad(*this, "COL.%u", 0)
, m_calenable(*this, "CAL_EN")
{
}
void hp3478a(machine_config &config);
protected:
virtual void machine_start() override;
//virtual void machine_reset() override; //not needed?
DECLARE_READ8_MEMBER(p1read);
DECLARE_WRITE8_MEMBER(p1write);
DECLARE_WRITE8_MEMBER(p2write);
DECLARE_WRITE8_MEMBER(nvwrite);
void io_bank(address_map &map);
void i8039_io(address_map &map);
void i8039_map(address_map &map);
required_device<i8039_device> m_maincpu;
required_device<nvram_device> m_nvram;
required_shared_ptr<uint8_t> m_nvram_raw;
required_device<watchdog_timer_device> m_watchdog;
required_memory_bank m_bank0;
required_device<address_map_bank_device> m_iobank;
required_ioport_array<4> m_keypad;
required_ioport m_calenable;
/////////////// stuff for internal LCD emulation
// shoud be split to a separate driver
std::unique_ptr<output_finder<16> > m_outputs;
void lcd_interface(uint8_t p2new);
void lcd_update_hinib(uint64_t shiftreg);
void lcd_update_lonib(uint64_t shiftreg);
void lcd_map_chars();
static uint32_t lcd_set_display(uint32_t segin);
uint8_t m_lcd_bitcount;
uint8_t m_lcd_want;
uint64_t m_lcd_bitbuf;
enum class lcd_state : uint8_t {
IDLE,
SYNC_SKIP,
SELECTED_ISA,
SELECTED_IWA
} m_lcdstate;
enum class lcd_iwatype : uint8_t {
ANNUNS,
REG_A,
REG_B,
REG_C,
DISCARD
} m_lcdiwa;
uint8_t m_lcd_chrbuf[12]; //raw digits (not ASCII)
uint8_t m_lcd_text[13]; //mapped to ASCII, only for debug output
uint32_t m_lcd_segdata[12];
///////////////////////////
uint8_t m_p2_oldstate; //used to detect edges on Port2 IO pins. Should be saveable ?
uint8_t m_p1_oldstate; //for P17 edge detection (WDT reset)
};
/***** callbacks */
/* port1 manages the keypad matrix */
READ8_MEMBER( hp3478a_state::p1read )
{
unsigned i;
uint8_t data = m_maincpu->p1_r() | 0x0F; //P10-P13 "pull-up"
// for each column, set Px=0 for pressed buttons (active low)
for (i = 0; i < 4; i++) {
if (!(data & (0x10 << i))) {
data &= (0xF0 | m_keypad[i]->read()); //not sure if the undefined upper bits will read as 1 ?
}
}
LOGMASKED(DEBUG_KEYPAD, "port1 read: 0x%02X\n", data);
return data;
}
/* pin P17 rising edges also reset the external WDT counter */
WRITE8_MEMBER( hp3478a_state::p1write )
{
if (~m_p1_oldstate & data & 0x80) {
//P17 rising edge
m_watchdog->watchdog_reset();
}
m_p1_oldstate = data;
}
/** a lot of stuff multiplexed on the P2 pins.
* parse the chipselect lines, A12 line, and LCD interface.
*/
WRITE8_MEMBER( hp3478a_state::p2write )
{
LOGMASKED(DEBUG_PORTS, "port2 write: %02X\n", data);
// check which CS line is active. No collision checking is done here
// because the LCD interface reuses those pins and we'd get spurious errors.
// So the last evaluated condition will be kept.
if (!(data & CALRAM_CS)) {
//will read lower 4 bits from calram
m_iobank->set_bank(CALRAM_ENTRY);
}
if (!(data & DIPSWITCH_CS)) {
m_iobank->set_bank(DIP_ENTRY);
}
if (!(data & GPIB_CS)) {
m_iobank->set_bank(GPIB_ENTRY);
}
if ((m_p2_oldstate ^ data) & A12_PIN) {
/* A12 pin state changed */
if (data & A12_PIN) {
m_bank0->set_entry(1);
LOGMASKED(DEBUG_BANKING, "changed to bank1\n");
} else {
m_bank0->set_entry(0);
LOGMASKED(DEBUG_BANKING, "changed to bank0\n");
}
}
if ((m_p2_oldstate ^ data) & DISP_MASK) {
/* display signals changed */
lcd_interface(data);
}
m_p2_oldstate = data;
}
/* CAL RAM write handler, to implement "CAL enable" front panel switch
*/
WRITE8_MEMBER( hp3478a_state::nvwrite ) {
if (m_calenable->read()) {
m_nvram_raw[offset] = data;
LOGMASKED(DEBUG_CAL, "write %02X to cal[%02X]\n", data, offset);
} else {
LOGMASKED(DEBUG_CAL, "write %02X to cal[%02X]:dropped\n", data, offset);
}
}
/**** LCD emulation
*
* Yuck. Emulate serial LCD module interface. don't really want to make a separate driver for this...
* The protocol is common to many HP products of the era. Some sources have the instruction words written as 10-bit
* words, but it would appear more consistent (and matches the intent guessed from the disassembled functions)
* that they are actually 8-bit bytes. The 2-bit difference is a "bogus" 2 clock cycles for when SYNC or PWO changes ?
*
*/
/** charset copied from roc10937 driver. Some special chars are wrong.
* Interestingly, the 3478a usually doesn't use "0x30" for the number 0, but instead
* maps it to the character 'O' ! It does use 0x30 when printing the GPIB address however.
*/
static const uint16_t hpcharset[]=
{ // FEDC BA98 7654 3210
0x507F, // 0101 0000 0111 1111 @.
0x44CF, // 0100 0100 1100 1111 A.
0x153F, // 0001 0101 0011 1111 B.
0x00F3, // 0000 0000 1111 0011 C.
0x113F, // 0001 0001 0011 1111 D.
0x40F3, // 0100 0000 1111 0011 E.
0x40C3, // 0100 0000 1100 0011 F.
0x04FB, // 0000 0100 1111 1011 G.
0x44CC, // 0100 0100 1100 1100 H.
0x1133, // 0001 0001 0011 0011 I.
0x007C, // 0000 0000 0111 1100 J.
0x4AC0, // 0100 1010 1100 0000 K.
0x00F0, // 0000 0000 1111 0000 L.
0x82CC, // 1000 0010 1100 1100 M.
0x88CC, // 1000 1000 1100 1100 N.
0x00FF, // 0000 0000 1111 1111 O.
0x44C7, // 0100 0100 1100 0111 P.
0x08FF, // 0000 1000 1111 1111 Q.
0x4CC7, // 0100 1100 1100 0111 R.
0x44BB, // 0100 0100 1011 1011 S.
0x1103, // 0001 0001 0000 0011 T.
0x00FC, // 0000 0000 1111 1100 U.
0x22C0, // 0010 0010 1100 0000 V.
0x28CC, // 0010 1000 1100 1100 W.
0xAA00, // 1010 1010 0000 0000 X.
0x9200, // 1001 0010 0000 0000 Y.
0x2233, // 0010 0010 0011 0011 Z.
0x00E1, // 0000 0000 1110 0001 [.
0x8800, // 1000 1000 0000 0000 \.
0x001E, // 0000 0000 0001 1110 ].
0x2800, // 0010 1000 0000 0000 ^.
0x0030, // 0000 0000 0011 0000 _.
0x0000, // 0000 0000 0000 0000 [space] , 0x20
0x8121, // 1000 0001 0010 0001 !.
0x0180, // 0000 0001 1000 0000 ".
0x553C, // 0101 0101 0011 1100 #.
0x55BB, // 0101 0101 1011 1011 $.
0x7799, // 0111 0111 1001 1001 %.
0xC979, // 1100 1001 0111 1001 &.
0x0200, // 0000 0010 0000 0000 '.
0x0A00, // 0000 1010 0000 0000 (.
0xA050, // 1010 0000 0000 0000 ).
0xFF00, // 1111 1111 0000 0000 *.
0x5500, // 0101 0101 0000 0000 +.
0x0000, // 0000 0000 0000 0000 //XXX (0x2C)
0x4400, // 0100 0100 0000 0000 --.
0x0000, // 0000 0000 0000 0000 //XXX (0x2E)
0x2200, // 0010 0010 0000 0000 /.
0x22FF, // 0010 0010 1111 1111 0. (0x30)
0x1100, // 0001 0001 0000 0000 1.
0x4477, // 0100 0100 0111 0111 2.
0x443F, // 0100 0100 0011 1111 3.
0x448C, // 0100 0100 1000 1100 4.
0x44BB, // 0100 0100 1011 1011 5.
0x44FB, // 0100 0100 1111 1011 6.
0x000F, // 0000 0000 0000 1111 7.
0x44FF, // 0100 0100 1111 1111 8.
0x44BF, // 0100 0100 1011 1111 9.
0xFFFF, // 1111 1111 1111 1111 [all segs] (0x3A)
0x2001, // 0010 0000 0000 0001 //XXX
0x2230, // 0010 0010 0011 0000 <.
0x4430, // 0100 0100 0011 0000 =.
0x8830, // 1000 1000 0011 0000 >.
0x1407, // 0001 0100 0000 0111 ?.
};
/** copy data in shiftreg to the high nibble of each digit in m_lcd_chrbuf */
void hp3478a_state::lcd_update_hinib(uint64_t shiftreg)
{
int i;
for (i=11; i >= 0; i--) {
m_lcd_chrbuf[i] &= 0x0F;
m_lcd_chrbuf[i] |= (shiftreg & 0x0F) << 4;
shiftreg >>= 4;
}
}
/** copy data in shiftreg to the low nibble of each digit in m_lcd_chrbuf */
void hp3478a_state::lcd_update_lonib(uint64_t shiftreg)
{
int i;
for (i=11; i >= 0; i--) {
m_lcd_chrbuf[i] &= 0xF0;
m_lcd_chrbuf[i] |= (shiftreg & 0x0F);
shiftreg >>= 4;
}
}
/** map LCD char to ASCII and segment data + update
*
* discards extra bits
*/
void hp3478a_state::lcd_map_chars()
{
int i;
LOGMASKED(DEBUG_LCD2, "LCD : map ");
for (i=0; i < 12; i++) {
bool dp = m_lcd_chrbuf[i] & 0x40; //check decimal point. Needs to be mapped to seg_bit16
bool comma = m_lcd_chrbuf[i] & 0x80; //check comma, maps to seg17
m_lcd_text[i] = (m_lcd_chrbuf[i] & 0x3F) + 0x40;
m_lcd_segdata[i] = hpcharset[m_lcd_chrbuf[i] & 0x3F] | (dp << 16) | (comma << 17);
LOGMASKED(DEBUG_LCD2, "[%02X>%04X] ", m_lcd_chrbuf[i] & 0x3F, m_lcd_segdata[i]);
}
LOGMASKED(DEBUG_LCD2, "\n");
}
/** ?? from roc10937 */
uint32_t hp3478a_state::lcd_set_display(uint32_t segin)
{
return bitswap<32>(segin, 31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,11,9,15,13,12,8,10,14,7,6,5,4,3,2,1,0);
}
// ISA command bytes
#define DISP_ISA_WANNUN 0xBC //annunciators
#define DISP_ISA_WA 0x0A //low nibbles
#define DISP_ISA_WB 0x1A //hi nib
#define DISP_ISA_WC 0x2A // "extended bit" ?
/** LCD serial interface state machine. I cheat and don't implement all commands.
* Also, it's not clear when exactly the display should be updated. After each regA/regB write
* seems to generate some glitches. After PWO deselect causes some half-written text to appear sometimes.
*/
void hp3478a_state::lcd_interface(uint8_t p2new)
{
bool pwo_state, sync_state, isa_state, iwa_state;
pwo_state = p2new & DISP_PWO;
sync_state = p2new & DISP_SYNC;
isa_state = p2new & DISP_ISA;
iwa_state = p2new & DISP_IWA;
if (!((p2new ^ m_p2_oldstate) & DISP_CK1)) {
// no clock edge : boring.
//LOGMASKED(DEBUG_LCD, "LCD : pwo(%d), sync(%d), isa(%d), iwa(%d)\n",
// pwo_state, sync_state, isa_state, iwa_state);
return;
}
if (!(p2new & DISP_CK1)) {
//neg edge
return;
}
// CK1 clock positive edge
if (!pwo_state) {
//not selected, reset everything
LOGMASKED(DEBUG_LCD, "LCD : state=IDLE, PWO deselected, %d stray bits(0x...%02X)\n",m_lcd_bitcount, m_lcd_bitbuf & 0xFF);
m_lcdstate = lcd_state::IDLE;
m_lcdiwa = lcd_iwatype::DISCARD;
std::transform(std::begin(m_lcd_segdata), std::end(m_lcd_segdata), std::begin(*m_outputs), lcd_set_display);
m_lcd_bitcount = 0;
m_lcd_bitbuf = 0;
return;
}
switch (m_lcdstate) {
case lcd_state::IDLE:
m_lcd_want = 8;
m_lcdstate = lcd_state::SYNC_SKIP;
break;
case lcd_state::SYNC_SKIP:
// if SYNC changed, we need to ignore two clock pulses.
m_lcd_bitcount++;
if (m_lcd_bitcount < 1) {
break;
}
m_lcd_bitcount = 0;
m_lcd_bitbuf = 0;
if (sync_state) {
m_lcdstate = lcd_state::SELECTED_ISA;
m_lcd_want = 8;
LOGMASKED(DEBUG_LCD, "LCD : state=SELECTED_ISA\n");
} else {
//don't touch m_lcd_want since it was possibly set in the ISA stage
m_lcdstate = lcd_state::SELECTED_IWA;
LOGMASKED(DEBUG_LCD, "LCD : state=SELECTED_IWA, want %d\n", m_lcd_want);
}
break;
case lcd_state::SELECTED_ISA:
if (!sync_state) {
//changing to SELECTED_IWA
m_lcdstate = lcd_state::SYNC_SKIP;
if (m_lcd_bitcount) {
LOGMASKED(DEBUG_LCD, "LCD : ISA->IWA, %d stray bits (0x%0X)\n", m_lcd_bitcount, m_lcd_bitbuf);
} else {
LOGMASKED(DEBUG_LCD, "LCD : ISA->IWA\n");
}
m_lcd_bitcount = 0;
m_lcd_bitbuf = 0;
break;
}
m_lcd_bitbuf |= (isa_state << m_lcd_bitcount);
m_lcd_bitcount++;
if (m_lcd_bitcount != m_lcd_want) {
break;
}
LOGMASKED(DEBUG_LCD, "LCD : Instruction 0x%02X\n", m_lcd_bitbuf & 0xFF);
//shouldn't get extra bits, but we have nothing better to do so just reset the shiftreg.
m_lcd_bitcount = 0;
switch (m_lcd_bitbuf & 0xFF) {
case DISP_ISA_WANNUN:
m_lcd_want = 44;
m_lcdiwa = lcd_iwatype::ANNUNS;
break;
case DISP_ISA_WA:
m_lcd_want = 100; //no, doesn't fit in a uint64, but only the first 36 bits are significant.
m_lcdiwa = lcd_iwatype::REG_A;
break;
case DISP_ISA_WB:
m_lcd_want = 100;
m_lcdiwa = lcd_iwatype::REG_B;
break;
case DISP_ISA_WC:
m_lcd_want = 44;
m_lcdiwa = lcd_iwatype::REG_C;
break;
default:
m_lcd_want = 44;
m_lcdiwa = lcd_iwatype::DISCARD;
break;
}
m_lcd_bitbuf = 0;
break;
case lcd_state::SELECTED_IWA:
if (sync_state) {
//changing to SELECTED_ISA
m_lcdstate = lcd_state::SYNC_SKIP;
if (m_lcd_bitcount) {
LOGMASKED(DEBUG_LCD, "LCD : IWA->ISA, %d stray bits (0x%I64X)\n", m_lcd_bitcount, m_lcd_bitbuf);
} else {
LOGMASKED(DEBUG_LCD, "LCD : IWA->ISA\n");
}
m_lcd_bitcount = 0;
m_lcd_bitbuf = 0;
break;
}
if (m_lcd_bitcount <= 0x3F) {
//clamp to bit 63;
m_lcd_bitbuf |= ((uint64_t) iwa_state << m_lcd_bitcount);
}
m_lcd_bitcount++;
if (m_lcd_bitcount != m_lcd_want) {
break;
}
LOGMASKED(DEBUG_LCD, "LCD : data 0x%I64X\n", m_lcd_bitbuf);
switch (m_lcdiwa) {
case lcd_iwatype::ANNUNS:
LOGMASKED(DEBUG_LCD2, "LCD : write annuns 0x%02X\n", m_lcd_bitbuf & 0xFF);
break;
case lcd_iwatype::REG_A:
lcd_update_lonib(m_lcd_bitbuf);
lcd_map_chars();
LOGMASKED(DEBUG_LCD2, "LCD : write reg A (lonib) %I64X, text=%s\n", m_lcd_bitbuf, (char *) m_lcd_text);
break;
case lcd_iwatype::REG_B:
lcd_update_hinib(m_lcd_bitbuf);
lcd_map_chars();
LOGMASKED(DEBUG_LCD2, "LCD : write reg B (lonib) %I64X, text=%s\n", m_lcd_bitbuf, (char *) m_lcd_text);
break;
default:
//discard
break;
}
//shouldn't get extra bits, but we have nothing better to do so just reset the shiftreg.
m_lcd_bitcount = 0;
m_lcd_bitbuf = 0;
break; //case SELECTED_IWA
}
return;
}
void hp3478a_state::machine_start()
{
m_bank0->configure_entries(0, 2, memregion("maincpu")->base(), 0x1000);
m_outputs = std::make_unique<output_finder<16> >(*this, "vfd%u", (unsigned) 0);
m_outputs->resolve();
m_watchdog->watchdog_enable();
}
/******************************************************************************
Address Maps
******************************************************************************/
void hp3478a_state::i8039_map(address_map &map)
{
map(0x0000, 0x0fff).bankr("bank0"); // CPU address space (4kB), banked according to P26 pin
}
void hp3478a_state::i8039_io(address_map &map)
{
map.global_mask(0xff);
map(0x00, 0xff).m(m_iobank, FUNC(address_map_bank_device::amap8));
}
/* depending on the P2 port state, different chipselect lines are activated, which
* affect the subsequent external accesses (movx)
* The addresses in here have nothing to do with the mcs48 address space.
*/
void hp3478a_state::io_bank(address_map &map)
{
map.unmap_value_high();
map(0x000, 0x0ff).ram().region("nvram", 0).share("nvram").w(FUNC(hp3478a_state::nvwrite));
map(0x100, 0x107).ram().share("gpibregs"); //XXX TODO : connect to i8291.cpp
map(0x200, 0x2ff).portr("DIP");
}
/******************************************************************************
Input Ports
******************************************************************************/
static INPUT_PORTS_START( hp3478a )
/* keypad bit matrix:
0x08|0x04|0x02|0x01
col.0 : (nc)|shift|ACA|DCA
col.1 : 4W|2W|ACV|DCV
col.2 : int|dn|up|auto
col.3 : (nc)|loc|srq|sgl
*/
PORT_START("COL.0")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("DCA")
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("ACA")
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_NAME("SHIFT")
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED ) //nothing on 0x08
PORT_START("COL.1")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_NAME("DCV")
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_NAME("ACV")
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_NAME("2W")
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON7 ) PORT_NAME("4W")
PORT_START("COL.2")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON8 ) PORT_NAME("AUTO")
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON9 ) PORT_NAME("UP")
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON10 ) PORT_NAME("DN")
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON11 ) PORT_NAME("INT")
PORT_START("COL.3")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON12 ) PORT_NAME("SGL")
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON13 ) PORT_NAME("SRQ")
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON14 ) PORT_NAME("LOC")
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED ) //nothing on 0x08
PORT_START("CAL_EN")
PORT_CONFNAME(1, 0, "CAL")
PORT_CONFSETTING(0x00, "disabled")
PORT_CONFSETTING(0x01, "enabled")
PORT_START("DIP")
PORT_DIPNAME( 0x1f, 0x17, "HP-IB Bus Address" ) PORT_DIPLOCATION("DIP:1,2,3,4,5")
PORT_DIPSETTING( 0x00, "0" )
PORT_DIPSETTING( 0x01, "1" )
PORT_DIPSETTING( 0x02, "2" )
PORT_DIPSETTING( 0x03, "3" )
PORT_DIPSETTING( 0x04, "4" )
PORT_DIPSETTING( 0x05, "5" )
PORT_DIPSETTING( 0x06, "6" )
PORT_DIPSETTING( 0x07, "7" )
PORT_DIPSETTING( 0x08, "8" )
PORT_DIPSETTING( 0x09, "9" )
PORT_DIPSETTING( 0x0a, "10" )
PORT_DIPSETTING( 0x0b, "11" )
PORT_DIPSETTING( 0x0c, "12" )
PORT_DIPSETTING( 0x0d, "13" )
PORT_DIPSETTING( 0x0e, "14" )
PORT_DIPSETTING( 0x0f, "15" )
PORT_DIPSETTING( 0x10, "16" )
PORT_DIPSETTING( 0x11, "17" )
PORT_DIPSETTING( 0x12, "18" )
PORT_DIPSETTING( 0x13, "19" )
PORT_DIPSETTING( 0x14, "20" )
PORT_DIPSETTING( 0x15, "21" )
PORT_DIPSETTING( 0x16, "22" )
PORT_DIPSETTING( 0x17, "23" )
PORT_DIPSETTING( 0x18, "24" )
PORT_DIPSETTING( 0x19, "25" )
PORT_DIPSETTING( 0x1a, "26" )
PORT_DIPSETTING( 0x1b, "27" )
PORT_DIPSETTING( 0x1c, "28" )
PORT_DIPSETTING( 0x1d, "29" )
PORT_DIPSETTING( 0x1e, "30" )
PORT_DIPSETTING( 0x1f, "31" )
PORT_DIPNAME( 0x20, 0x00, "PWR ON SRQ" ) PORT_DIPLOCATION("DIP:6")
PORT_DIPSETTING( 0x00, "Disabled" )
PORT_DIPSETTING( 0x20, "Enabled" )
//0x40 unused
PORT_DIPNAME( 0x80, 0x00, "50/60Hz AC" ) PORT_DIPLOCATION("DIP:8")
PORT_DIPSETTING( 0x00, "60Hz" )
PORT_DIPSETTING( 0x80, "50Hz" )
INPUT_PORTS_END
/******************************************************************************
Machine Drivers
******************************************************************************/
void hp3478a_state::hp3478a(machine_config &config)
{
auto &mcu(I8039(config, "maincpu", CPU_CLOCK));
mcu.set_addrmap(AS_PROGRAM, &hp3478a_state::i8039_map);
mcu.set_addrmap(AS_IO, &hp3478a_state::i8039_io);
mcu.p1_in_cb().set(FUNC(hp3478a_state::p1read));
mcu.p1_out_cb().set(FUNC(hp3478a_state::p1write));
mcu.p2_out_cb().set(FUNC(hp3478a_state::p2write));
NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0);
ADDRESS_MAP_BANK(config, m_iobank, 0);
m_iobank->set_map(&hp3478a_state::io_bank);
m_iobank->set_data_width(8);
m_iobank->set_addr_width(18);
m_iobank->set_stride(0x100);
WATCHDOG_TIMER(config, m_watchdog).set_time(attotime::from_ticks(3*5*(1<<19),CPU_CLOCK));
// video
config.set_default_layout(layout_hp3478a);
}
/******************************************************************************
ROM Definitions
******************************************************************************/
ROM_START( hp3478a )
ROM_REGION( 0x2000, "maincpu", 0 )
ROM_LOAD("rom_dc118.bin", 0, 0x2000, CRC(10097ced) SHA1(bd665cf7e07e63f825b2353c8322ed8a4376b3bd)) //main CPU ROM, can match other datecodes too
ROM_REGION( 0x100, "nvram", 0 ) /* Calibration RAM, battery-backed */
ROM_LOAD( "calram.bin", 0, 0x100, NO_DUMP)
ROM_END
/******************************************************************************
Drivers
******************************************************************************/
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
SYST( 1983, hp3478a, 0, 0, hp3478a, hp3478a,hp3478a_state, empty_init, "HP", "HP 3478A Multimeter", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )
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