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RL02: update bus address register

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folkert van heusden 2024-04-17 20:44:41 +02:00
parent e99d1bb6d0
commit fdc39bc2af
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
2 changed files with 14 additions and 3 deletions
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16
rl02.cpp
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@ -94,6 +94,14 @@ uint32_t rl02::get_bus_address() const
return registers[(RL02_BAR - RL02_BASE) / 2] | (uint32_t((registers[(RL02_CSR - RL02_BASE) / 2] >> 4) & 3) << 16);
}
void rl02::update_bus_address(const uint32_t a)
{
registers[(RL02_BAR - RL02_BASE) / 2] = a;
registers[(RL02_CSR - RL02_BASE) / 2] &= ~(3 << 4);
registers[(RL02_CSR - RL02_BASE) / 2] |= ((a >> 16) & 3) << 4;
}
uint32_t rl02::calcOffset(const uint16_t da) const
{
int sector = da & 63;
@ -135,7 +143,6 @@ void rl02::writeWord(const uint16_t addr, uint16_t v)
DOLOG(debug, false, "RL02 read %d bytes (dec) from %d (dec) to %06o (oct)", count, disk_offset, memory_address);
uint32_t p = memory_address;
while(count > 0) {
uint32_t cur = std::min(uint32_t(sizeof xfer_buffer), count);
@ -144,8 +151,11 @@ void rl02::writeWord(const uint16_t addr, uint16_t v)
break;
}
for(uint32_t i=0; i<cur; i++, p++)
b->writeUnibusByte(p, xfer_buffer[i]);
for(uint32_t i=0; i<cur; i++, memory_address++) {
b->writeUnibusByte(memory_address, xfer_buffer[i]);
update_bus_address(memory_address);
}
temp_disk_offset += cur;

1
rl02.h
View file

@ -33,6 +33,7 @@ private:
std::atomic_bool *const disk_write_acitivity { nullptr };
uint32_t get_bus_address() const;
void update_bus_address(const uint32_t a);
uint32_t calcOffset(uint16_t) const;
public: