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pve500.c - multiplex signals for the 7seg display from Felipe Sanches (nw)

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This commit is contained in:
Scott Stone 2014-06-25 17:21:36 +00:00
parent 1ba2dde2ab
commit f31bb25a82
1 changed files with 66 additions and 24 deletions
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90
src/mess/drivers/pve500.c
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@ -8,12 +8,39 @@
Driver by Felipe Correa da Silva Sanches <juca@members.fsf.org>
Technical info at https://www.garoa.net.br/wiki/PVE-500
Notes:
One can induce the self-diagnose by booting the device holding LEARN and P2-RESET buttons togheter
With the default keyboard map, this can be done by holding keys L and S while pressing F3.
(Don't forget to unlock the keyboard by using the UI TOGGLE key)
This self-diagnose routine displays the value C817, which is the checksum value of the subcpu ROM
and afterwards it displays the following message:
SELFdIAG Error___ _F3 F3_CtC3c
which means it detected an error in the CTC circuitry (it means we're emulating it wrong!)
F3 is the coordinate of the subcpu EEPROM chip in the PCB.
According to the service manual, this error code means: "ICF3 CTC CH-3 counter operation failure (No interruption)"
Known issues:
There's still an annoying blinking in the 7-seg display.
Changelog:
2014 JUN 24 [Felipe Sanches]:
* figured out the multiplexing signals for the 7seg display
2014 JUN 23 [Felipe Sanches]:
* hooked-up the RS422 ports
2014 JAN 14 [Felipe Sanches]:
* Initial driver skeleton
*/
#define LOG_7SEG_DISPLAY_SIGNALS 0
#define DEBUGGING_INDUCE_SELFDIAGNOSE 0
#include "emu.h"
#include "cpu/z80/tmpz84c015.h"
#include "sound/beep.h"
@ -203,9 +230,6 @@ void pve500_state::machine_start()
io_LE = 0;
io_SEL = 0;
io_KY = 0;
for (int i=0; i<27; i++)
output_set_digit_value(i, 0x00);
}
void pve500_state::machine_reset()
@ -217,35 +241,35 @@ void pve500_state::machine_reset()
READ8_MEMBER(pve500_state::dualport_ram_left_r)
{
printf("dualport_ram: Left READ\n");
//printf("dualport_ram: Left READ\n");
m_subcpu->trg1(1); //(INT_Right)
return dualport_7FE_data;
}
WRITE8_MEMBER(pve500_state::dualport_ram_left_w)
{
printf("dualport_ram: Left WRITE\n");
//printf("dualport_ram: Left WRITE\n");
dualport_7FF_data = data;
m_subcpu->trg1(0); //(INT_Right)
}
READ8_MEMBER(pve500_state::dualport_ram_right_r)
{
printf("dualport_ram: Right READ\n");
//printf("dualport_ram: Right READ\n");
m_maincpu->trg1(1); //(INT_Left)
return dualport_7FF_data;
}
WRITE8_MEMBER(pve500_state::dualport_ram_right_w)
{
printf("dualport_ram: Right WRITE\n");
//printf("dualport_ram: Right WRITE\n");
dualport_7FE_data = data;
m_maincpu->trg1(0); //(INT_Left)
}
READ8_MEMBER(pve500_state::io_expander_r)
{
printf("READ IO_EXPANDER_PORT%c\n", 'A'+offset);
// printf("READ IO_EXPANDER_PORT%c\n", 'A'+offset);
switch (offset){
case IO_EXPANDER_PORTA:
return io_SC;
@ -253,14 +277,17 @@ READ8_MEMBER(pve500_state::io_expander_r)
return io_LE;
case IO_EXPANDER_PORTC:
io_KY = 0x00;
if (io_SC & 0x01) io_KY |= ioport("SCAN0")->read();
if (io_SC & 0x02) io_KY |= ioport("SCAN1")->read();
if (io_SC & 0x04) io_KY |= ioport("SCAN2")->read();
if (io_SC & 0x08) io_KY |= ioport("SCAN3")->read();
if (io_SC & 0x10) io_KY |= ioport("SCAN4")->read();
if (io_SC & 0x20) io_KY |= ioport("SCAN5")->read();
if (io_SC & 0x40) io_KY |= ioport("SCAN6")->read();
if (io_SC & 0x80) io_KY |= ioport("SCAN7")->read();
if (!BIT(io_SC, 0)) io_KY |= ioport("SCAN0")->read();
if (!BIT(io_SC, 1)) io_KY |= ioport("SCAN1")->read();
if (!BIT(io_SC, 2)) io_KY |= ioport("SCAN2")->read();
if (!BIT(io_SC, 3)) io_KY |= ioport("SCAN3")->read();
if (!BIT(io_SC, 4)) io_KY |= ioport("SCAN4")->read();
if (!BIT(io_SC, 5)) io_KY |= ioport("SCAN5")->read();
if (!BIT(io_SC, 6)) io_KY |= ioport("SCAN6")->read();
if (!BIT(io_SC, 7)) io_KY |= ioport("SCAN7")->read();
#if DEBUGGING_INDUCE_SELFDIAGNOSE
io_KY = 0x42; //according to procedure described in the service manual
#endif
return io_KY;
case IO_EXPANDER_PORTD:
return io_LD;
@ -273,33 +300,48 @@ READ8_MEMBER(pve500_state::io_expander_r)
WRITE8_MEMBER(pve500_state::io_expander_w)
{
static int LD_data[4];
int swap[4] = {2,1,0,3};
switch (offset){
case IO_EXPANDER_PORTA:
printf("io_expander_w: PORTA (io_SC=%02X)\n", data);
#if LOG_7SEG_DISPLAY_SIGNALS
printf("io_expander_w: PORTA (io_SC=%02X)\n", data);
#endif
io_SC = data;
for (int j=0; j<8; j++){
if (!BIT(io_SC,j)){
for (int i=0; i<4; i++)
output_set_digit_value(8*swap[i] + j, LD_data[i]);
}
}
break;
case IO_EXPANDER_PORTB:
#if LOG_7SEG_DISPLAY_SIGNALS
printf("io_expander_w: PORTB (io_LE=%02X)\n", data);
#endif
io_LE = data;
break;
case IO_EXPANDER_PORTC:
#if LOG_7SEG_DISPLAY_SIGNALS
printf("io_expander_w: PORTC (io_KY=%02X)\n", data);
#endif
io_KY = data;
break;
case IO_EXPANDER_PORTD:
#if LOG_7SEG_DISPLAY_SIGNALS
printf("io_expander_w: PORTD (io_LD=%02X)\n", data);
#endif
io_LD = data;
break;
case IO_EXPANDER_PORTE:
io_SEL = data;
#if LOG_7SEG_DISPLAY_SIGNALS
printf("io_expander_w PORTE (io_SEL=%02X)\n", data);
#endif
io_SEL = data;
for (int i=0; i<4; i++){
if (io_SEL & (1 << i)){
for (int j=0; j<8; j++){
if (io_SC & (1<<j)){
output_set_digit_value(8*i + j, BITSWAP8(io_LD & 0x7F, 7, 0, 1, 2, 3, 4, 5, 6));
}
}
if (BIT(io_SEL, i)){
LD_data[i] = 0x7F & BITSWAP8(io_LD ^ 0xFF, 7, 0, 1, 2, 3, 4, 5, 6);
}
}
break;