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folkert van heusden 2022-03-18 19:28:13 +01:00
parent 5ac576a0ac
commit b44c6ffa31
3 changed files with 19 additions and 15 deletions
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19
cpu.cpp
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@ -1104,18 +1104,17 @@ void cpu::busError()
{
fprintf(stderr, "BUS ERROR\n");
// PSW = 177776
// mov @#PSW, -(sp)
trap(4);
}
void cpu::trap(const uint16_t vector)
{
fprintf(stderr, "TRAP %o\n", vector);
pushStack(getPSW());
// mov pc, -(sp)
pushStack(getPC());
// mov @#VEC+2, @#PSW
setPSW(b -> readWord(6));
// mov @#VEC, pc
setPC(b -> readWord(4));
setPSW(b -> readWord(vector + 2));
setPC(b -> readWord(vector + 0));
}
std::pair<std::string, int> cpu::addressing_to_string(const uint8_t mode_register, const uint16_t pc)

1
cpu.h
View file

@ -58,6 +58,7 @@ public:
uint16_t popStack();
void busError();
void trap(const uint16_t vector);
void setEmulateMFPT(const bool v) { emulateMFPT = v; }

14
rk05.cpp
View file

@ -4,6 +4,7 @@
#include <string.h>
#include "bus.h"
#include "cpu.h"
#include "error.h"
#include "gen.h"
#include "rk05.h"
@ -222,9 +223,9 @@ void rk05::writeWord(const uint16_t addr, uint16_t v)
while(temp > 0) {
uint32_t cur = std::min(uint32_t(sizeof xfer_buffer), temp);
#if defined(ESP32)
yield();
#if defined(ESP32)
if (fh.read(xfer_buffer, cur) != size_t(cur))
D(fprintf(stderr, "RK05 fread error: %s\n", strerror(errno));)
#else
@ -265,11 +266,14 @@ void rk05::writeWord(const uint16_t addr, uint16_t v)
fprintf(stderr, "RK05 command %d UNHANDLED\n", func);
}
if (v & 64) { // bit 6, invoke interrupt when done vector address 220, see http://www.pdp-11.nl/peripherals/disk/rk05-info.html
fprintf(stderr, "RK05 HIER\n"); // FIXME
}
registers[(RK05_WC - RK05_BASE) / 2] = 0;
registers[(RK05_DS - RK05_BASE) / 2] |= 64; // drive ready
registers[(RK05_CS - RK05_BASE) / 2] |= 128; // control ready
if (v & 64) { // bit 6, invoke interrupt when done vector address 220, see http://www.pdp-11.nl/peripherals/disk/rk05-info.html
b->getCpu()->trap(0220);
}
}
}