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This commit is contained in:
Andrei Holub 2025-02-19 19:26:55 -05:00
parent 7bd9ea4812
commit 2c3455a4d5
2 changed files with 25 additions and 29 deletions
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51
src/devices/cpu/mpk1839/kl1839vm1.cpp
View File

@ -291,7 +291,7 @@ void kl1839vm1_device::ma(u32 op)
u32 kob_data = kop1 ? R(x) : K(am);
if (!m_pcm_queue.empty())
if (m_pcm_queue_size > 0)
{
if (py)
am = vax_pcm_pull();
@ -345,7 +345,7 @@ void kl1839vm1_device::mb(u32 op)
u32 kob_data = kop2 ? R(x) : R(y);
if (!m_pcm_queue.empty())
if (m_pcm_queue_size > 0)
{
if (py)
y = vax_pcm_pull();
@ -383,7 +383,7 @@ void kl1839vm1_device::mc(u32 op)
const bool py = BIT(op, 2);
const bool px = BIT(op, 1);
if (!m_pcm_queue.empty())
if (m_pcm_queue_size > 0)
{
if (py)
y = vax_pcm_pull();
@ -661,7 +661,7 @@ void kl1839vm1_device::decode_op(u32 op)
void kl1839vm1_device::vax_decode_pc()
{
if (!m_pcm_queue.empty())
if (m_pcm_queue_size > 0)
{
LOGVAX("Unused decoded data\n");
}
@ -671,7 +671,6 @@ void kl1839vm1_device::vax_decode_pc()
m_op_size = 1;
AMC = op << 4;
std::vector<u32> tmp_args;
const vax_disassembler::mode* args = vax_disassembler::get_operands(op);
u8 arg_n = 0;
do
@ -686,7 +685,7 @@ void kl1839vm1_device::vax_decode_pc()
// byte
case vax_disassembler::mode::bb:
tmp_args.push_back(s8(m_ram.read_byte(PC + m_op_size)));
m_pcm_queue[arg_n] = s8(m_ram.read_byte(PC + m_op_size));
m_mem_reg[arg_n] = 0x8f;
m_op_size += 1;
break;
@ -700,19 +699,19 @@ void kl1839vm1_device::vax_decode_pc()
u8 p = m_ram.read_byte(PC + m_op_size);
if (p == 0x8f) // M
{
tmp_args.push_back(m_ram.read_byte(PC + m_op_size + 1));
m_pcm_queue[arg_n] = m_ram.read_byte(PC + m_op_size + 1);
m_mem_reg[arg_n] = p;
m_op_size += 2;
}
else if ((p & 0xf0) == 0x80) // M = R(n)+
{
tmp_args.push_back(p & 0x0f);
m_pcm_queue[arg_n] = p & 0x0f;
m_mem_reg[arg_n] = p;
m_op_size += 1;
}
else if ((p & 0xf0) == 0x50) // R
{
tmp_args.push_back(p & 0x0f);
m_pcm_queue[arg_n] = p & 0x0f;
m_mem_reg[arg_n] = p;
m_op_size += 1;
}
@ -726,7 +725,7 @@ void kl1839vm1_device::vax_decode_pc()
// word
case vax_disassembler::mode::bw:
tmp_args.push_back(s16(m_ram.read_word(PC + m_op_size)));
m_pcm_queue[arg_n] = s16(m_ram.read_word(PC + m_op_size));
m_mem_reg[arg_n] = 0x8f;
m_op_size += 2;
break;
@ -742,19 +741,19 @@ void kl1839vm1_device::vax_decode_pc()
u8 p = m_ram.read_byte(PC + m_op_size);
if (p == 0x8f) // M
{
tmp_args.push_back(m_ram.read_dword(PC + m_op_size + 1));
m_pcm_queue[arg_n] = m_ram.read_dword(PC + m_op_size + 1);
m_mem_reg[arg_n] = p;
m_op_size += 5;
}
else if ((p & 0xf0) == 0x80) // M = R(n)+
{
tmp_args.push_back(p & 0x0f);
m_pcm_queue[arg_n] = p & 0x0f;
m_mem_reg[arg_n] = p;
m_op_size += 1;
}
else if ((p & 0xf0) == 0x50) // R
{
tmp_args.push_back(p & 0x0f);
m_pcm_queue[arg_n] = p & 0x0f;
m_mem_reg[arg_n] = p;
m_op_size += 1;
}
@ -768,7 +767,6 @@ void kl1839vm1_device::vax_decode_pc()
default:
LOGVAX("(%x): unknown operand mode %02d in OP=%02x (n=%d)\n", PC, u8(mode), op, arg_n + 1);
tmp_args.clear();
m_op_size = 0;
break;
}
@ -776,17 +774,12 @@ void kl1839vm1_device::vax_decode_pc()
++arg_n;
} while ((arg_n < 6) && (args[arg_n] != vax_disassembler::mode::none));
m_pcm_queue.clear();
m_pcm_queue_size = 0;
if (m_op_size > 0) // above completed without failure
{
while (!tmp_args.empty())
{
m_pcm_queue.push_back(tmp_args.back());
tmp_args.pop_back();
}
m_pcm_queue_size = (arg_n == 1 && m_mem_reg[0] == u8(~0)) ? 0 : arg_n; // none args case
u8 args_type = 0;
if (!m_pcm_queue.empty())
if (m_pcm_queue_size > 0)
{
for (u8 i = 0; i < arg_n; ++i)
{
@ -896,14 +889,13 @@ void kl1839vm1_device::vax_decode_pc()
u32 kl1839vm1_device::vax_pcm_pull(bool is_bo)
{
if (m_pcm_queue.empty())
if (m_pcm_queue_size == 0)
{
LOGVAX("Pooling empty decoder queue\n");
}
else
{
PCM = m_pcm_queue.back();
m_pcm_queue.pop_back();
PCM = m_pcm_queue[0];
bool is_mem = (m_mem_reg[0] & 0xf0) == 0x80;
if (is_bo && !is_mem)
@ -916,7 +908,10 @@ u32 kl1839vm1_device::vax_pcm_pull(bool is_bo)
PCM = R(PCM);
R(r) = PCM + 1;
}
std::copy(std::begin(m_pcm_queue) + 1, std::end(m_pcm_queue), std::begin(m_pcm_queue));
std::copy(std::begin(m_mem_reg) + 1, std::end(m_mem_reg), std::begin(m_mem_reg));
m_pcm_queue_size--;
}
return PCM;
@ -926,7 +921,6 @@ u32 kl1839vm1_device::vax_pcm_pull(bool is_bo)
void kl1839vm1_device::device_start()
{
m_vax_dasm = std::make_unique<vax_disassembler>();
m_pcm_queue.resize(6);
space(AS_OPCODES).cache(m_microcode);
space(AS_DATA).specific(m_sysram);
@ -944,7 +938,8 @@ void kl1839vm1_device::device_start()
save_pointer(NAME(m_consts), 0x10);
save_pointer(NAME(m_reg), 0x20);
save_item(NAME(m_op_size));
save_item(NAME(m_pcm_queue));
save_item(NAME(m_pcm_queue_size));
save_pointer(NAME(m_pcm_queue), 6);
save_pointer(NAME(m_mem_reg), 6);
// Register debugger state
@ -1059,7 +1054,7 @@ void kl1839vm1_device::device_reset()
m_vma_tmp.d = 0;
RV = 0;
SCH = 0;
m_pcm_queue.clear();
m_pcm_queue_size = 0;
m_op_size = 0;
}

3
src/devices/cpu/mpk1839/kl1839vm1.h
View File

@ -111,7 +111,8 @@ private:
int m_icount;
u32 m_op_size;
std::vector<u32> m_pcm_queue;
u8 m_pcm_queue_size;
u32 m_pcm_queue[6];
u8 m_mem_reg[6];
};