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- direction flag added to control port, debug messages improved

This commit is contained in:
Volker Ruppert 2001-12-18 21:58:59 +00:00
parent c17e17c785
commit c658faf211
2 changed files with 61 additions and 27 deletions
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85
bochs/iodev/parallel.cc
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: parallel.cc,v 1.13 2001-11-15 23:35:26 vruppert Exp $
// $Id: parallel.cc,v 1.14 2001-12-18 21:58:59 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
@ -51,23 +51,23 @@ bx_parallel_c::bx_parallel_c(void)
bx_parallel_c::~bx_parallel_c(void)
{
if (OUTPUT != NULL)
if (OUTPUT != NULL)
fclose(OUTPUT);
}
void
bx_parallel_c::init(bx_devices_c *d)
{
BX_DEBUG(("Init $Id: parallel.cc,v 1.13 2001-11-15 23:35:26 vruppert Exp $"));
BX_DEBUG(("Init $Id: parallel.cc,v 1.14 2001-12-18 21:58:59 vruppert Exp $"));
BX_PAR_THIS devices = d;
/* PARALLEL PORT 1 */
BX_PAR_THIS devices->register_irq(7, "Parallel Port 1");
BX_PAR_THIS devices->register_io_read_handler(this,
read_handler, 0x0379, "Parallel Port 1");
BX_PAR_THIS devices->register_io_read_handler(this,
read_handler, 0x037A, "Parallel Port 1");
for (unsigned addr=0x0378; addr<=0x037A; addr++) {
BX_PAR_THIS devices->register_io_read_handler(this,
read_handler, addr, "Parallel Port 1");
}
BX_PAR_THIS devices->register_io_write_handler(this,
write_handler, 0x0378, "Parallel Port 1");
BX_PAR_THIS devices->register_io_write_handler(this,
@ -84,6 +84,7 @@ bx_parallel_c::init(bx_devices_c *d)
BX_PAR_THIS s.CONTROL.init = 1;
BX_PAR_THIS s.CONTROL.slct_in = 1;
BX_PAR_THIS s.CONTROL.irq = 0;
BX_PAR_THIS s.CONTROL.input = 0;
BX_PAR_THIS initmode = 0;
@ -97,15 +98,17 @@ bx_parallel_c::init(bx_devices_c *d)
void
bx_parallel_c::virtual_printer(void)
{
if (OUTPUT != NULL) {
fputc(BX_PAR_THIS s.data, OUTPUT);
fflush (OUTPUT);
if (BX_PAR_THIS s.STATUS.slct) {
if (OUTPUT != NULL) {
fputc(BX_PAR_THIS s.data, OUTPUT);
fflush (OUTPUT);
}
if (BX_PAR_THIS s.CONTROL.irq == 1) {
BX_PAR_THIS devices->pic->trigger_irq(7);
}
BX_PAR_THIS s.STATUS.ack = 0;
BX_PAR_THIS s.STATUS.busy = 1;
}
if (BX_PAR_THIS s.CONTROL.irq == 1) {
BX_PAR_THIS devices->pic->trigger_irq(7);
}
BX_PAR_THIS s.STATUS.ack = 0;
BX_PAR_THIS s.STATUS.busy = 1;
}
// static IO port read callback handler
@ -132,6 +135,15 @@ bx_parallel_c::read(Bit32u address, unsigned io_len)
if (io_len == 1) {
switch (address) {
case 0x0378:
if (!BX_PAR_THIS s.CONTROL.input) {
return (Bit32u)BX_PAR_THIS s.data;
}
else {
BX_ERROR(("read: input mode not supported"));
return (0xFF);
}
break;
case 0x0379:
{
retval = ((BX_PAR_THIS s.STATUS.busy << 7) |
@ -150,18 +162,19 @@ bx_parallel_c::read(Bit32u address, unsigned io_len)
BX_PAR_THIS s.STATUS.slct = 1;
BX_PAR_THIS initmode = 0;
}
BX_DEBUG(("printer status register returns 0x%02x", retval));
BX_DEBUG(("read: status register returns 0x%02x", retval));
return retval;
}
break;
case 0x037A:
{
retval = ((BX_PAR_THIS s.CONTROL.irq << 4) |
{
retval = ((BX_PAR_THIS s.CONTROL.input << 5) |
(BX_PAR_THIS s.CONTROL.irq << 4) |
(BX_PAR_THIS s.CONTROL.slct_in << 3) |
(BX_PAR_THIS s.CONTROL.init << 2) |
(BX_PAR_THIS s.CONTROL.autofeed << 1) |
(BX_PAR_THIS s.CONTROL.strobe));
BX_DEBUG(("printer control register returns 0x%02x", retval));
BX_DEBUG(("read: control register returns 0x%02x", retval));
return retval;
}
break;
@ -194,10 +207,9 @@ bx_parallel_c::write(Bit32u address, Bit32u value, unsigned io_len)
if (io_len == 1) {
switch (address) {
case 0x0378:
{
BX_PAR_THIS s.data = (Bit8u)value;
}
break;
BX_PAR_THIS s.data = (Bit8u)value;
BX_DEBUG(("write: data output register = 0x%02x", (Bit8u)value));
break;
case 0x037A:
{
if ((value & 0x01) == 0x01) {
@ -224,7 +236,17 @@ bx_parallel_c::write(Bit32u address, Bit32u value, unsigned io_len)
BX_PAR_THIS s.CONTROL.init = 0;
}
}
BX_PAR_THIS s.CONTROL.slct_in = ((value & 0x08) == 0x08);
if ((value & 0x08) == 0x08) {
if (BX_PAR_THIS s.CONTROL.slct_in == 0) {
BX_PAR_THIS s.CONTROL.slct_in = 1;
BX_DEBUG(("printer now online"));
}
} else {
if (BX_PAR_THIS s.CONTROL.slct_in == 1) {
BX_PAR_THIS s.CONTROL.slct_in = 0;
BX_DEBUG(("printer now offline"));
}
}
BX_PAR_THIS s.STATUS.slct = BX_PAR_THIS s.CONTROL.slct_in;
if ((value & 0x10) == 0x10) {
if (BX_PAR_THIS s.CONTROL.irq == 0) {
@ -237,8 +259,19 @@ bx_parallel_c::write(Bit32u address, Bit32u value, unsigned io_len)
BX_DEBUG(("polling mode selected"));
}
}
if ((value & 0xE0) > 0) {
BX_ERROR(("unsupported control bit set"));
if ((value & 0x20) == 0x20) {
if (BX_PAR_THIS s.CONTROL.input == 0) {
BX_PAR_THIS s.CONTROL.input = 1;
BX_DEBUG(("data input mode selected"));
}
} else {
if (BX_PAR_THIS s.CONTROL.input == 1) {
BX_PAR_THIS s.CONTROL.input = 0;
BX_DEBUG(("data output mode selected"));
}
}
if ((value & 0xC0) > 0) {
BX_ERROR(("write: unsupported control bit ignored"));
}
}
break;

3
bochs/iodev/parallel.h
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: parallel.h,v 1.6 2001-11-14 00:29:20 bdenney Exp $
// $Id: parallel.h,v 1.7 2001-12-18 21:58:59 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
@ -48,6 +48,7 @@ typedef struct {
Boolean init;
Boolean slct_in;
Boolean irq;
Boolean input;
} CONTROL;
} bx_par_t;