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RK05 bus address calculation fix

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This commit is contained in:
folkert van heusden 2024-04-17 13:44:27 +02:00
parent a386e9aa03
commit 624abe5a4d
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
2 changed files with 8 additions and 2 deletions
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9
rk05.cpp
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@ -83,9 +83,14 @@ uint16_t rk05::readWord(const uint16_t addr)
return vtemp;
}
uint32_t rk05::get_bus_address() const
{
return registers[(RK05_BA - RK05_BASE) / 2] | (uint32_t((registers[(RK05_CS - RK05_BASE) / 2] >> 4) & 3) << 16);
}
void rk05::update_bus_address(const uint16_t v)
{
uint32_t org_v = registers[(RK05_BA - RK05_BASE) / 2] | (uint32_t((registers[(RK05_CS - RK05_BASE) / 2] >> 4) & 3) << 16);
uint32_t org_v = get_bus_address();
org_v += v;
@ -126,7 +131,7 @@ void rk05::writeWord(const uint16_t addr, uint16_t v)
const uint32_t diskoff = track * 12 + sector;
const uint32_t diskoffb = diskoff * 512l; // RK05 is high density
const uint16_t memoff = registers[(RK05_BA - RK05_BASE) / 2];
const uint32_t memoff = get_bus_address();
registers[(RK05_CS - RK05_BASE) / 2] &= ~(1 << 13); // reset search complete

1
rk05.h
View file

@ -35,6 +35,7 @@ private:
std::atomic_bool *const disk_read_acitivity { nullptr };
std::atomic_bool *const disk_write_acitivity { nullptr };
uint32_t get_bus_address() const;
void update_bus_address(const uint16_t v);
public: