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Altair8800.ino
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Altair8800.ino
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// -----------------------------------------------------------------------------
// Altair 8800 Simulator
// Copyright (C) 2017 David Hansel
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
// -----------------------------------------------------------------------------
#include "Altair8800.h"
#include "config.h"
#include "cpucore.h"
#include "host.h"
#include "mem.h"
#include "serial.h"
#include "printer.h"
#include "profile.h"
#include "breakpoint.h"
#include "disassembler.h"
#include "numsys.h"
#include "filesys.h"
#include "drive.h"
#include "tdrive.h"
#include "cdrive.h"
#include "hdsk.h"
#include "timer.h"
#include "prog.h"
#include "dazzler.h"
#include "vdm1.h"
#include "io.h"
#define BIT(n) (1<<(n))
#define b2s numsys_byte2string
uint16_t cswitch = 0;
uint16_t dswitch = 0;
static uint16_t p_regPC = 0xFFFF;
volatile uint32_t altair_interrupts_buf = 0;
volatile uint32_t altair_interrupts = 0;
volatile byte altair_vi_level_cur = 0;
volatile byte altair_vi_level = 0;
volatile bool altair_interrupts_enabled = false;
static bool altair_rtc_available = false;
static bool altair_rtc_running = false;
volatile bool sticky_slow = false;
word status_wait = false;
bool have_ps2 = false;
void print_panel_serial(bool force = false);
void print_dbg_info();
void read_inputs_panel();
void read_inputs_serial();
void process_inputs();
void empty_input_buffer();
void rtc_setup();
#if USE_THROTTLE>0
uint32_t throttle_micros = 0;
uint16_t throttle_delay = 0;
#define THROTTLE_TIMER_PERIOD 25000
void update_throttle()
{
uint32_t now = micros();
uint32_t ratio = now==throttle_micros ? 0xffffffff : (2000*THROTTLE_TIMER_PERIOD) / (now-throttle_micros);
uint32_t t = cpu_clock_KHz();
if( ratio>t+10 )
throttle_delay += (uint16_t) HOST_PERFORMANCE_FACTOR;
else if( ratio<t && throttle_delay>0 )
throttle_delay -= (uint16_t) HOST_PERFORMANCE_FACTOR;
throttle_micros = now;
}
#endif
void altair_set_outputs(uint16_t a, byte v)
{
host_set_addr_leds(a);
host_set_data_leds(v);
if( mem_is_protected(a) )
host_set_status_led_PROT();
else
host_clr_status_led_PROT();
if( host_read_status_led_M1() ) print_dbg_info();
print_panel_serial();
}
void altair_wait_reset()
{
// prevent printing processor status now (will print after reset)
p_regPC = regPC;
// set bus/data LEDs on, status LEDs off
altair_set_outputs(0xffff, 0xff);
host_clr_status_led_INT();
host_set_status_led_WO();
host_clr_status_led_STACK();
host_clr_status_led_HLTA();
host_clr_status_led_OUT();
host_clr_status_led_M1();
host_clr_status_led_INP();
host_clr_status_led_MEMR();
host_clr_status_led_PROT();
altair_interrupt_disable();
// wait while RESET switch is held
while( host_read_function_switch_debounced(SW_RESET) );
// if in single-step mode we need to set a flag so we know
// to exit out of the currently executing instruction
if( host_read_status_led_WAIT() ) cswitch |= BIT(SW_RESET);
}
void read_inputs()
{
cswitch = 0;
read_inputs_panel();
read_inputs_serial();
print_panel_serial();
process_inputs();
}
byte get_device(byte switches)
{
byte dev;
if ( (switches & 0x80)==0 )
dev = serial_last_active_primary_device();
else
dev = (switches & 0x60) >> 5;
return dev;
}
void process_inputs()
{
if( cswitch & BIT(SW_DEPOSIT) )
{
MWRITE(regPC, dswitch&0xff);
altair_set_outputs(regPC, MREAD(regPC));
}
else if( cswitch & BIT(SW_DEPNEXT) )
{
regPC++;
MWRITE(regPC, dswitch&0xff);
altair_set_outputs(regPC, MREAD(regPC));
}
if( cswitch & BIT(SW_EXAMINE) )
{
regPC = dswitch;
p_regPC = ~regPC;
altair_set_outputs(regPC, MREAD(regPC));
}
else if( cswitch & BIT(SW_EXNEXT) )
{
regPC = regPC+1;
altair_set_outputs(regPC, MREAD(regPC));
}
if( cswitch & BIT(SW_AUX1DOWN) )
{
serial_acr_check_cload_timeout();
if( dswitch & 0x80 )
{
// SW7 is up => memory page operation
host_set_status_led_HLDA();
uint16_t page = dswitch & 0xff00;
byte filenum = dswitch & 0x003f;
if( dswitch & 0x40 )
{
// SW6 is up => save memory page
if( filesys_write_file('M', filenum, Mem+page, 256) )
DBG_FILEOPS4(3, F("saved memory page "), b2s(page>>8), F(" to file #"), b2s(filenum));
else
DBG_FILEOPS4(2, F("unable to save memory page "), b2s(page>>8), F(" to file #"), b2s(filenum));
}
else
{
// SW6 is down => load memory page
if( !MEM_IS_WRITABLE(page) )
DBG_FILEOPS3(2, F("memory page "), b2s(page>>8), F(" is not writable"));
else if( filesys_read_file('M', filenum, Mem+page, 256)==256 )
{
DBG_FILEOPS4(3, F("loaded memory page "), b2s(page>>8), F(" from file #"), b2s(filenum));
regPC = page;
}
else
DBG_FILEOPS4(2, F("file not found loading memory page "), b2s(page>>8), F(" from file #"), b2s(filenum));
altair_set_outputs(regPC, MREAD(regPC));
}
serial_update_hlda_led();
}
else if (dswitch & 0x40 )
{
Serial.println(F("\r\nReceiving Intel HEX data..."));
int status = altair_read_intel_hex();
Serial.println();
altair_print_intel_hex_status(status);
// skip any remaining input
empty_input_buffer();
}
else
{
// SW7 is down => load program
if( prog_load(dswitch & 0xff, ®PC) )
{
// program exists and is supposed to run immediately
host_set_data_leds(MREAD(regPC));
host_clr_status_led_WAIT();
host_clr_status_led_PROT();
}
else
{
// either program does not exist or is not supposed to run immediately
p_regPC = regPC;
altair_set_outputs(regPC, MREAD(regPC));
}
}
}
else if( cswitch & BIT(SW_AUX1UP) )
{
if( (cswitch & BIT(SW_STOP)) || host_read_function_switch_debounced(SW_STOP) )
{
// STOP is up => edit configuration
config_edit();
if( config_serial_panel_enabled() )
{
Serial.print(F("\033[14B"));
print_panel_serial(true);
}
p_regPC = ~regPC;
altair_set_outputs(regPC, MREAD(regPC));
rtc_setup();
}
else
{
// program shortcut
byte p = config_aux1_program();
if( p < 0x40 )
{
if( prog_get_name(p)!=NULL )
{
// run program
dswitch = (dswitch & 0xff00) | p;
cswitch = BIT(SW_AUX1DOWN);
process_inputs();
}
}
else if( p < 0x80 )
{
// run tarbell disk (first mount disk then install and run tarbell disk boot ROM)
tdrive_reset();
if( tdrive_mount(0, p & 0x3f) )
{
dswitch = (dswitch & 0xff00) | 16;
cswitch = BIT(SW_AUX1DOWN);
process_inputs();
}
}
else if( p < 0xC0 )
{
// run disk (first mount disk then install and run disk boot ROM)
if( drive_mount(0, p & 0x3f) )
{
dswitch = (dswitch & 0xff00) | 8;
cswitch = BIT(SW_AUX1DOWN);
process_inputs();
}
}
else
{
// run hard disk (first mount disk then install and run hard disk boot ROM)
if( hdsk_mount(0, 0, p & 0x3f) )
{
dswitch = (dswitch & 0xff00) | 14;
cswitch = BIT(SW_AUX1DOWN);
process_inputs();
}
}
}
}
if( cswitch & BIT(SW_AUX2DOWN) )
{
if( false )
{}
#if NUM_DRIVES>0
else if( (dswitch&0xF000)==0x1000 )
{
if( (dswitch & 0xff)==0 )
drive_dir();
else
{
const char *desc = drive_get_image_description(dswitch&0xff);
if( drive_mount((dswitch >> 8) & 0x0f, dswitch & 0xff) )
{
if( desc==NULL )
DBG_FILEOPS4(2, F("mounted new disk image "), drive_get_image_filename(dswitch&0xff, false), F(" in drive "), (dswitch>>8) & 0x0f);
else
DBG_FILEOPS4(2, F("mounted disk image '"), desc, F("' in drive "), (dswitch>>8) & 0x0f);
}
else
DBG_FILEOPS4(1, F("error mounting disk image "), drive_get_image_filename(dswitch&0xff, false), F(" in drive "), (dswitch>>8) & 0x0f);
}
}
#endif
#if NUM_CDRIVES>0
else if( (dswitch&0xF000)==0x7000 )
{
if( (dswitch & 0xff)==0 )
cdrive_dir();
else
{
const char *desc = cdrive_get_image_description(dswitch & 0xff);
if( cdrive_mount((dswitch >> 8) & 0x03, dswitch & 0xff) )
{
if( desc == NULL )
DBG_FILEOPS4(2, F("mounted new disk image "), cdrive_get_image_filename(dswitch & 0xff, false), F(" in cromemco drive "), (dswitch >> 8) & 0x0f);
else
DBG_FILEOPS4(2, F("mounted disk image '"), desc, F("' in cromemco drive "), (dswitch >> 8) & 0x0f);
}
else
DBG_FILEOPS4(1, F("error mounting disk image "), cdrive_get_image_filename(dswitch & 0xff, false), F(" in cromemco drive "), (dswitch >> 8) & 0x0f);
}
}
#endif
#if NUM_TDRIVES>0
else if( (dswitch&0xF000)==0x5000 )
{
if( (dswitch & 0xff)==0 )
tdrive_dir();
else
{
const char *desc = tdrive_get_image_description(dswitch&0xff);
if( tdrive_mount((dswitch >> 8) & 0x03, dswitch & 0xff) )
{
if( desc==NULL )
DBG_FILEOPS4(2, F("mounted new disk image "), drive_get_image_filename(dswitch&0xff, false), F(" in tarbell drive "), (dswitch>>8) & 0x0f);
else
DBG_FILEOPS4(2, F("mounted disk image '"), desc, F("' in tarbell drive "), (dswitch>>8) & 0x0f);
}
else
DBG_FILEOPS4(1, F("error mounting disk image "), drive_get_image_filename(dswitch&0xff, false), F(" in tarbell drive "), (dswitch>>8) & 0x0f);
}
}
#endif
#if NUM_HDSK_UNITS>0
else if( (dswitch&0xF000)==0x3000 )
{
if( (dswitch & 0xff)==0 )
hdsk_dir();
else
{
char buf[50];
byte unit = (dswitch >> 10) & 0x03;
byte platter = (dswitch >> 8) & 0x03;
sprintf(buf, "' in platter %i of unit %i", platter, unit+1);
const char *desc = hdsk_get_image_description(dswitch&0xff);
if( hdsk_mount(unit, platter, dswitch & 0xff) )
{
if( desc==NULL )
DBG_FILEOPS3(2, F("mounted new hard disk image '"), hdsk_get_image_filename(dswitch&0xff, false), buf);
else
DBG_FILEOPS3(2, F("mounted hard disk image '"), desc, buf);
}
else
DBG_FILEOPS3(1, F("error mounting hard disk image '"), hdsk_get_image_filename(dswitch&0xff, false), buf);
}
}
#endif
else
{
print_panel_serial();
byte dev = get_device(dswitch >> 8);
if( serial_capture_running(dev) )
DBG_FILEOPS(1, F("unable to replay data (capture operation in progress)"));
else if( serial_replay_running(dev) )
serial_stop(dev);
else
serial_replay_start(dev, (dswitch & 0x100)==0, dswitch & 0xff);
}
}
else if( cswitch & BIT(SW_AUX2UP) )
{
if( false )
{}
#if NUM_DRIVES>0
else if( (dswitch&0xF000)==0x1000 )
{
if( drive_unmount((dswitch >> 8) & 0x0f) )
DBG_FILEOPS2(2, F("unmounted drive "), (dswitch>>8) & 0x0f);
else
DBG_FILEOPS2(1, F("error unmounting drive "), (dswitch>>8) & 0x0f);
}
#endif
#if NUM_CDRIVES>0
else if ( (dswitch&0xF000)==0x7000 )
{
if ( cdrive_unmount((dswitch >> 8) & 0x03) )
DBG_FILEOPS2(2, F("unmounted cromemco drive "), (dswitch >> 8) & 0x0f);
else
DBG_FILEOPS2(1, F("error unmounting cromemco drive "), (dswitch >> 8) & 0x0f);
}
#endif
#if NUM_TDRIVES>0
else if( (dswitch&0xF000)==0x5000 )
{
if( tdrive_unmount((dswitch >> 8) & 0x03) )
DBG_FILEOPS2(2, F("unmounted tarbell drive "), (dswitch>>8) & 0x0f);
else
DBG_FILEOPS2(1, F("error unmounting tarbell drive "), (dswitch>>8) & 0x0f);
}
#endif
#if NUM_HDSK_UNITS>0
else if( (dswitch&0xF000)==0x3000 )
{
char buf[50];
byte unit = (dswitch >> 10) & 0x03;
byte platter = (dswitch >> 8) & 0x03;
sprintf(buf, "platter %i of unit %i", platter, unit+1);
if( hdsk_unmount(unit, platter) )
DBG_FILEOPS2(1, F("unmounted "), buf);
else
DBG_FILEOPS2(1, F("error unmounting "), buf);
}
#endif
else
{
print_panel_serial();
byte dev = get_device(dswitch >> 8);
if( serial_replay_running(dev) )
DBG_FILEOPS(1, F("cannot start capture (replay operation in progress)"));
else if( serial_capture_running(dev) )
serial_stop(dev);
else
serial_capture_start(dev, dswitch & 0xff);
}
}
if( cswitch & BIT(SW_RESET) )
{
altair_wait_reset();
}
if( cswitch & BIT(SW_CLR) )
{
serial_close_files();
#if USE_DAZZLER>0
// turn off Dazzler and reset it
byte i = dazzler_get_iface();
dazzler_set_iface(0xff);
dazzler_set_iface(i);
#endif
}
if( (cswitch & BIT(SW_RUN)) && (cswitch & BIT(SW_SLOW)) )
sticky_slow = true;
else if( cswitch & BIT(SW_RUN) )
{
if( config_serial_debug_enabled() && config_serial_input_enabled() )
Serial.print(F("\r\n\n--- RUNNING (press ESC twice to stop) ---\r\n\n"));
host_clr_status_led_WAIT();
host_clr_status_led_PROT();
}
if( cswitch & (BIT(SW_PROTECT)) )
{
mem_protect(regPC);
if( mem_is_protected(regPC) ) host_set_status_led_PROT();
}
if( cswitch & (BIT(SW_UNPROTECT)) )
{
mem_unprotect(regPC);
if( !mem_is_protected(regPC) ) host_clr_status_led_PROT();
}
}
void altair_wait_step()
{
cswitch &= BIT(SW_RESET); // clear everything but RESET status
while( host_read_status_led_WAIT() && (cswitch & (BIT(SW_STEP) | BIT(SW_SLOW) | BIT(SW_RESET)))==0 )
{ read_inputs(); delay(10); }
if( cswitch & BIT(SW_SLOW) ) delay(500);
}
void read_inputs_panel()
{
// we react on positive edges on the function switches...
cswitch = host_read_function_switches_edge();
// ...except for the SLOW switch which is active as long as it is held down
if( sticky_slow || host_read_function_switch_debounced(SW_SLOW) ) cswitch |= BIT(SW_SLOW);
#if STANDALONE==0
// address switches on Mega are connected to analog inputs which are free
// floating and therefore random when not connected
dswitch = host_read_addr_switches();
#endif
}
byte read_device()
{
byte dev = 0xff;
#if USE_SECOND_2SIO>0
Serial.print(F("(s=SIO,a=ACR,1=2SIO-1,2=2SIO-2,3=2nd 2SIO-1,4=2nd 2SIO-2,SPACE=last,ESC=abort): "));
#else
Serial.print(F("(s=SIO,a=ACR,1=2SIO-1,2=2SIO-2,SPACE=last,ESC=abort): "));
#endif
int c = -1;
#if USE_SECOND_2SIO>0
while( c!='s' && c!='a' && c!='1' && c!='2' && c!='3' && c!='4' && c!=' ' && c!=27 )
#else
while( c!='s' && c!='a' && c!='1' && c!='2' && c!=' ' && c!=27 )
#endif
c = serial_read();
if( c!=27 )
{
switch(c)
{
case 's': dev = CSM_SIO; break;
case 'a': dev = CSM_ACR; break;
case '1': dev = CSM_2SIO1; break;
case '2': dev = CSM_2SIO2; break;
#if USE_SECOND_2SIO>0
case '3': dev = CSM_2SIO3; break;
case '4': dev = CSM_2SIO4; break;
#endif
case ' ': dev = 0x80; break;
}
Serial.print((char) c);
}
return dev;
}
void altair_dump_intel_hex(uint16_t start, uint16_t end)
{
uint16_t a = start;
while( a<=end )
{
byte cs = 0;
Serial.write(':');
byte n = min(16, end-a+1);
numsys_print_byte_hex(n); cs -= n; // record length
numsys_print_byte_hex(a>>8); cs -= a>>8; // address high byte
numsys_print_byte_hex(a&0xff); cs -= a&0xff; // address low byte
numsys_print_byte_hex(0); // record type (0=data record)
for(uint16_t i=0; i<n; i++)
{
byte b = MREAD(a+i);
numsys_print_byte_hex(b);
cs -= b;
}
numsys_print_byte_hex(cs);
Serial.println();
a+=n;
if( a==0 ) break;
}
Serial.println(F(":0000000000"));
}
void altair_print_intel_hex_status(int status)
{
switch( status )
{
case 0: Serial.println(F("Success")); break;
case -1: Serial.println(F("Error: Expected ':' at start of line")); break;
case -2: Serial.println(F("Error: incorrect checksum")); break;
case -3: Serial.println(F("Error: outside available address space")); break;
default:
{
char name[10];
uint16_t start, len;
if( status<-10 && mem_get_rom_info(-status-10, name, &start, &len) )
{
Serial.print(F("Error: Conflicts with ROM '"));
Serial.print(name); Serial.print(F("' at "));
numsys_print_word(start);
Serial.print('-');
numsys_print_word(start+len-1);
}
else
{ Serial.print(F("Unknown error: ")); Serial.println(status); }
break;
}
}
}
int altair_read_intel_hex(uint16_t *start, uint16_t *end)
{
int res = 0xFF;
word aa = 0xffff;
if( start!=NULL ) *start = 0xFFFF;
if( end!=NULL ) *end = 0x0000;
while( 1 )
{
// expect line to start with a colon
int c = -1;
while( c<0 || isspace(c) ) c=serial_read();
if( c!=':' ) return -1;
// initialize checksum
byte cs = 0;
// first byte is record length
byte n = numsys_read_hex_byte(); cs -= n;
// next two bytes are address
byte d = numsys_read_hex_byte(); cs -= d;
word a = numsys_read_hex_byte(); cs -= a;
a = a + 256*d;
// next byte is record type
byte r = numsys_read_hex_byte(); cs -= r;
switch( r )
{
case 0:
{
// data record
if( a != aa && n>0 )
{
if( aa!=0xffff ) { numsys_print_word(aa-1); Serial.println(); }
numsys_print_word(a);
aa = a;
}
aa += n;
Serial.print('.');
// make sure that the data record will fit in RAM and will not intersect with
// any active ROMs
if( (uint32_t)a+n > MEMSIZE ) return -3;
for(int i=0; i<mem_get_num_roms(); i++)
{
uint16_t rs, rl, rf;
mem_get_rom_info(i, NULL, &rs, &rl);
if( (rf & MEM_ROM_FLAG_DISABLED)==0 && rs<a+n && rs+rl>a )
return -(10+i);
}
if( n>0 && start!=NULL && a < *start ) *start = a;
for(byte i=0; i<n; i++)
{
d = numsys_read_hex_byte();
Mem[a] = d;
cs -= d;
a++;
}
if( n>0 && end!=NULL && a-1 > *end ) *end = a-1;
break;
}
default:
{
// unhandled record => skip
for(byte i=0; i<n; i++) cs += numsys_read_hex_byte();
break;
}
}
// test checksum
byte csb = numsys_read_hex_byte();
if( cs != csb )
return -2; // checksum error
// empty record means we're done
if( n==0 )
{
numsys_print_word(aa-1);
return 0;
}
}
return res;
}
void read_data()
{
uint16_t addr, len;
byte b;
Serial.print(F("\r\n\nStart address: "));
if( numsys_read_word(&addr) )
{
Serial.print(F("\r\nNumber of bytes: "));
if( numsys_read_word(&len) )
{
Serial.print(F("\r\nData: "));
while( len>0 )
{
Serial.write(' ');
if( !numsys_read_byte(&b) ) return;
MWRITE(addr, (byte) b);
++addr;
--len;
}
}
}
Serial.println();
}
void empty_input_buffer()
{
while( true )
{ if( serial_read()<0 ) { delay(15); if( serial_read()<0 ) { delay(150); if( serial_read()<0 ) break; } } }
}
void read_inputs_serial()
{
if( !config_serial_input_enabled() )
return;
int data = serial_read();
if( data<0 )
return;
#if STANDALONE>0
else if( data >= '0' && data <= '9' )
dswitch = dswitch ^ (1 << (data - '0'));
else if( data >= 'a' && data <= 'f' )
dswitch = dswitch ^ (1 << (data - 'a' + 10));
else if( data == '/' )
{
Serial.print(F("\r\nSet Addr switches to: "));
numsys_read_word(&dswitch);
Serial.println('\n');
}
#endif
else if( data == 'X' )
cswitch |= BIT(SW_EXAMINE);
else if( data == 'x' )
cswitch |= BIT(SW_EXNEXT);
else if( data == 'P' )
cswitch |= BIT(SW_DEPOSIT);
else if( data == 'p' )
cswitch |= BIT(SW_DEPNEXT);
else if( data == 'r' )
cswitch |= BIT(SW_RUN);
else if( data == 'o' || data == 27 )
cswitch |= BIT(SW_STOP);
else if( data == 't' )
cswitch |= BIT(SW_STEP);
else if( data == 'R' )
cswitch |= BIT(SW_RESET);
else if( data == '!' )
cswitch |= BIT(SW_RESET) | BIT(SW_STOP);
else if( data == 'U' )
cswitch |= BIT(SW_AUX1UP);
else if( data == 'u' )
cswitch |= BIT(SW_AUX1DOWN);
else if( data == '>' )
{
Serial.print(F("\r\nRun from address: "));
if( numsys_read_word(®PC) )
{
regPC--;
p_regPC = ~regPC;
if( config_serial_debug_enabled() )
Serial.print(F("\r\n\n--- RUNNING (press ESC twice to stop) ---\r\n\n"));
Serial.println();
host_clr_status_led_WAIT();
host_clr_status_led_PROT();
}
else
Serial.println();
}
else if( data == 's' )
{
Serial.print(F("\r\nCapture from "));
byte dev = read_device();
if( dev < 0xff )
{
cswitch |=BIT(SW_AUX2UP);
dswitch = dev==0x80 ? 0 : 0x8000 | (dev << 13);
if( !serial_capture_running(dev) )
{
Serial.print(F(" File #: "));
if( numsys_read_byte(&dev) )
dswitch |= dev;
else
cswitch = 0;
}
}
Serial.println();
}
else if( data == 'l' )
{
Serial.print(F("\r\nReplay to "));
byte dev = read_device();
if( dev < 0xff )
{
cswitch |= BIT(SW_AUX2DOWN);
// if the replay device is mapped to the primary host console
// then we must run immediately because otherwise the debugging
// console will consume the replayed characters
if( dev==0x80 || config_serial_map_sim_to_host(dev)==config_host_serial_primary() )
cswitch |= BIT(SW_RUN);
dswitch = dev==0x80 ? 0 : 0x8000 | (dev << 13);
if( !serial_replay_running(dev) )
{
char c;
Serial.print(F(" (e)xample/(f)ile: "));
do { c=serial_read(); } while(c!='e' && c!='f');
if( c=='f' ) dswitch |= 0x100;
Serial.print(c);
Serial.print(c=='f' ? F(" File #: ") : F(" Example #: "));
if( numsys_read_byte(&dev) )
dswitch |= dev;
else
cswitch = 0;
}
}
Serial.println();
}
#if NUM_DRIVES>0 || NUM_CDRIVES>0 || NUM_TDRIVES>0 || NUM_HDSK_UNITS>0
else if( data == 'm' )
{
char c = 0;
#if NUM_DRIVES==0 && NUM_TDRIVES==0 && NUM_CDRIVES==0
c = 'h';
#elif NUM_DRIVES==0 && NUM_HDSK_UNITS==0 && NUM_CDRIVES==0
c = 't';
#elif NUM_TDRIVES==0 && NUM_HDSK_UNITS==0 && NUM_CDRIVES==0
c = 'f';
#elif NUM_DRIVES==0 && NUM_HDSK_UNITS==0 && NUM_TDRIVES==0
c = 'c';
#else
Serial.print(F("\r\nMount "));
#if NUM_DRIVES>0
Serial.print(F("(f)loppy "));
#endif
#if NUM_CDRIVES>0
Serial.print(F("(c)romemco floppy "));
#endif
#if NUM_TDRIVES>0
Serial.print(F("(t)arbell floppy "));
#endif
#if NUM_HDSK_UNITS>0
Serial.print(F("(h)ard disk "));
#endif
Serial.print(F("? "));
#endif
if( c==0 )
{
do { c=serial_read(); } while(c!='f' && c!='F' && c!='h' && c!='H' && c!='t' && c!='T' && c!='c' && c!='C' && c!=27);
if( c!=27 ) { Serial.print(c); Serial.println(' '); }
}
if( c==27 )
Serial.println();
else
{
bool ok = false;
#if NUM_DRIVES>0
if( (c=='f' || c=='F') )
{
byte b;
Serial.print(F("Floppy drive number (0-"));
Serial.print(NUM_DRIVES-1);
Serial.print(F("): "));
if( numsys_read_byte(&b) && b<NUM_DRIVES )
{ dswitch = 0x1000 | (b << 8); ok = true; }
}
#endif
#if NUM_CDRIVES>0
if( (c == 'c' || c == 'C') )
{
byte b;
Serial.print(F("Cromemco floppy drive number (0-"));
Serial.print(NUM_CDRIVES - 1);
Serial.print(F("): "));
if( numsys_read_byte(&b) && b < 4 )
{ dswitch = 0x7000 | (b << 8); ok = true; }
}
#endif
#if NUM_TDRIVES>0
if( (c=='t' || c=='T') )
{
byte b;
Serial.print(F("Tarbell floppy drive number (0-"));
Serial.print(NUM_TDRIVES-1);
Serial.print(F("): "));
if( numsys_read_byte(&b) && b<4 )
{ dswitch = 0x5000 | (b << 8); ok = true; }
}
#endif
#if NUM_HDSK_UNITS>0
if( (c=='h' || c=='H') )
{
#if NUM_HDSK_UNITS==1
c = '1';
#else
Serial.print(F("Hard disk unit number (1-"));
Serial.print(NUM_HDSK_UNITS);
Serial.print(F("): "));
do { c=serial_read(); } while( (c<'1' || c>'0'+NUM_HDSK_UNITS) && c!=27);
if( c!=27 ) { Serial.print(c); Serial.print(' '); }
#endif
if( c!=27 )
{
dswitch = 0x3000 | ((c-'1') << 10);
Serial.print(F("Platter number (0-3): "));
do { c=serial_read(); } while( (c<'0' || c>'3') && c!=27);
if( c!=27 )
{ Serial.print(c); dswitch |= (c-'0') << 8; ok = true; }
}
}
#endif
if( ok )
{
byte b;
Serial.print(F(" Image number: "));
if( numsys_read_byte(&b) )
{
dswitch |= b;
cswitch |= BIT(SW_AUX2DOWN);
}
else
dswitch = 0;
}
else
dswitch = 0;
Serial.println();
}
}
#endif
else if( data == 'Q' )
cswitch |= BIT(SW_PROTECT);
else if( data == 'q' )
cswitch |= BIT(SW_UNPROTECT);
else if( data == 'D' )
{
bool go;
uint16_t addr;
Serial.print(F("Start address: "));
go = numsys_read_word(&addr);
Serial.println();
while( go )
{
numsys_print_word(addr);
Serial.print(F(": "));
addr += disassemble(Mem, addr, true);
Serial.println();
while( !serial_available() ) delay(100);
go = (serial_read() == 0x20);
}
p_regPC = ~regPC;
print_dbg_info();
}
else if( data == 'M' )
{
bool go;
uint16_t addr;