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interrupts/vectors are from kernel space

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folkert van heusden 2022-03-19 18:26:15 +01:00
parent cf64216ecd
commit 0d16d16ab8
1 changed files with 10 additions and 0 deletions
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10
bus.cpp
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@ -247,6 +247,11 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev)
const uint8_t apf = a >> 13; // active page field
bool is_user = use_prev ? (c -> getBitPSW(12) && c -> getBitPSW(13)) : (c -> getBitPSW(14) && c -> getBitPSW(15));
// always retrieve interrupt etc vectors from kernel space
if (a < 256 * 4)
is_user = false;
uint32_t m_offset = pages[apf + is_user * 8].par * 64;
if ((a & 1) && word_mode == 0)
@ -448,6 +453,11 @@ uint16_t bus::write(const uint16_t a, const bool word_mode, uint16_t value, cons
bool is_user = use_prev ? (c -> getBitPSW(12) && c -> getBitPSW(13)) : (c -> getBitPSW(14) && c -> getBitPSW(15));
uint32_t m_offset = pages[apf + is_user * 8].par * 64;
// always write interrupt etc vectors from to kernel space
// TODO: check rights
if (a < 256 * 4)
is_user = false;
pages[apf].pdr |= 1 << 6; // page has been written to
if ((a & 1) && word_mode == 0)