folkert/KEK
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

bus address in rk05 is 18 bit

Browse source
This commit is contained in:
folkert van heusden 2024-04-17 10:48:15 +02:00
parent 04bd8ac6eb
commit 82d6c1ce18
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
2 changed files with 16 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
rk05.cpp
View file

@ -83,6 +83,18 @@ uint16_t rk05::readWord(const uint16_t addr)
return vtemp;
}
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);
org_v += v;
registers[(RK05_BA - RK05_BASE) / 2] = org_v;
registers[(RK05_CS - RK05_BASE) / 2] &= ~(3 << 4);
registers[(RK05_CS - RK05_BASE) / 2] |= ((org_v >> 16) & 3) << 4;
}
void rk05::writeByte(const uint16_t addr, const uint8_t v)
{
uint16_t vtemp = registers[(addr - RK05_BASE) / 2];
@ -137,7 +149,7 @@ void rk05::writeWord(const uint16_t addr, uint16_t v)
if (v & 2048)
DOLOG(debug, false, "RK05 inhibit BA increase");
else
registers[(RK05_BA - RK05_BASE) / 2] += reclen;
update_bus_address(reclen);
if (++sector >= 12) {
sector = 0;
@ -178,7 +190,7 @@ void rk05::writeWord(const uint16_t addr, uint16_t v)
b->writeUnibusByte(p++, xfer_buffer[i]);
if ((v & 2048) == 0)
registers[(RK05_BA - RK05_BASE) / 2] += 2;
update_bus_address(2);
}
temp -= cur;

2
rk05.h
View file

@ -34,6 +34,8 @@ private:
std::atomic_bool *const disk_read_acitivity { nullptr };
std::atomic_bool *const disk_write_acitivity { nullptr };
void update_bus_address(const uint16_t v);
public:
rk05(const std::vector<disk_backend *> & files, bus *const b, std::atomic_bool *const disk_read_acitivity, std::atomic_bool *const disk_write_acitivity);
virtual ~rk05();