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tube: Fixed 256 byte transfer mode.

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This commit is contained in:
Nigel Barnes 2019-08-22 03:07:20 +01:00
parent 3b0c5ea52b
commit d789c5dcf8
1 changed files with 19 additions and 16 deletions
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35
src/devices/machine/tube.cpp
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@ -91,10 +91,13 @@ uint8_t tube_device::host_r(offs_t offset)
case 1: /* Register 1 */
data = m_ph1[0];
for (int i = 0; i < 23; i++) m_ph1[i] = m_ph1[i + 1];
m_ph1pos--;
m_pstat[0] |= 0x40;
if (!m_ph1pos) m_hstat[0] &= ~0x80;
if (!machine().side_effects_disabled())
{
for (int i = 0; i < 23; i++) m_ph1[i] = m_ph1[i + 1];
m_ph1pos--;
m_pstat[0] |= 0x40;
if (!m_ph1pos) m_hstat[0] &= ~0x80;
}
break;
case 2: /* Register 2 flags */
@ -103,7 +106,7 @@ uint8_t tube_device::host_r(offs_t offset)
case 3: /* Register 2 */
data = m_ph2;
if (m_hstat[1] & 0x80)
if (BIT(m_hstat[1], 7) && !machine().side_effects_disabled())
{
m_hstat[1] &= ~0x80;
m_pstat[1] |= 0x40;
@ -116,11 +119,11 @@ uint8_t tube_device::host_r(offs_t offset)
case 5: /* Register 3 */
data = m_ph3[0];
if (m_ph3pos > 0)
if ((m_ph3pos > 0) && !machine().side_effects_disabled())
{
m_ph3[0] = m_ph3[1];
m_ph3pos--;
m_pstat[2] |= 0x40;
m_pstat[2] |= 0xc0;
if (!m_ph3pos) m_hstat[2] &= ~0x80;
}
break;
@ -131,7 +134,7 @@ uint8_t tube_device::host_r(offs_t offset)
case 7: /* Register 4 */
data = m_ph4;
if (m_hstat[3] & 0x80)
if (BIT(m_hstat[3], 7) && !machine().side_effects_disabled())
{
m_hstat[3] &= ~0x80;
m_pstat[3] |= 0x40;
@ -148,7 +151,7 @@ void tube_device::host_w(offs_t offset, uint8_t data)
switch (offset & 0x07)
{
case 0: /* Status flags */
if (data & 0x80)
if (BIT(data, 7))
m_r1stat |= (data & 0x3f);
else
m_r1stat &= ~(data & 0x3f);
@ -168,7 +171,7 @@ void tube_device::host_w(offs_t offset, uint8_t data)
break;
case 5: /* Register 3 */
if (m_r1stat & 0x10)
if (BIT(m_r1stat, 4))
{
if (m_hp3pos < 2)
m_hp3[m_hp3pos++] = data;
@ -209,7 +212,7 @@ uint8_t tube_device::parasite_r(offs_t offset)
case 1: /* Register 1 */
data = m_hp1;
if (m_pstat[0] & 0x80)
if (BIT(m_pstat[0], 7) && !machine().side_effects_disabled())
{
m_pstat[0] &= ~0x80;
m_hstat[0] |= 0x40;
@ -222,7 +225,7 @@ uint8_t tube_device::parasite_r(offs_t offset)
case 3: /* Register 2 */
data = m_hp2;
if (m_pstat[1] & 0x80)
if (BIT(m_pstat[1], 7) && !machine().side_effects_disabled())
{
m_pstat[1] &= ~0x80;
m_hstat[1] |= 0x40;
@ -235,7 +238,7 @@ uint8_t tube_device::parasite_r(offs_t offset)
case 5: /* Register 3 */
data = m_hp3[0];
if (m_hp3pos > 0)
if ((m_hp3pos > 0) && !machine().side_effects_disabled())
{
m_hp3[0] = m_hp3[1];
m_hp3pos--;
@ -253,7 +256,7 @@ uint8_t tube_device::parasite_r(offs_t offset)
case 7: /* Register 4 */
data = m_hp4;
if (m_pstat[3] & 0x80)
if (BIT(m_pstat[3], 7) && !machine().side_effects_disabled())
{
m_pstat[3] &= ~0x80;
m_hstat[3] |= 0x40;
@ -286,7 +289,7 @@ void tube_device::parasite_w(offs_t offset, uint8_t data)
break;
case 5: /* Register 3 */
if (m_r1stat & 0x10)
if (BIT(m_r1stat, 4))
{
if (m_ph3pos < 2)
m_ph3[m_ph3pos++] = data;
@ -301,7 +304,7 @@ void tube_device::parasite_w(offs_t offset, uint8_t data)
m_ph3[0] = data;
m_ph3pos = 1;
m_hstat[2] |= 0x80;
m_pstat[2] &= ~0x40;
m_pstat[2] &= ~0xc0;
}
break;