diff options
author | 2022-06-16 09:59:48 -0400 | |
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committer | 2022-06-16 10:00:43 -0400 | |
commit | b1a3c44e47864c441ac534b9a0f5855a6a754fa9 (patch) | |
tree | 00927fc4d2d5f818dcb7e8ba1bd87e48cf33387a | |
parent | 32c507d34d4bbe357a7ec6100025dc21a6e151c2 (diff) |
kp64.cpp: Better workaround
-rw-r--r-- | src/devices/cpu/z80/kp64.cpp | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/devices/cpu/z80/kp64.cpp b/src/devices/cpu/z80/kp64.cpp index aac78425951..697ed65268a 100644 --- a/src/devices/cpu/z80/kp64.cpp +++ b/src/devices/cpu/z80/kp64.cpp @@ -189,11 +189,13 @@ u16 kp64_device::count_value() const noexcept void kp64_device::reload_count() { m_count = BIT(m_status, 5) ? 0xffff : m_cr; - if (BIT(m_status, 0)) { - if(m_cr == 0) - m_cr = 0xffff; - - m_count_timer->adjust(clocks_to_attotime(u32(m_count) + 1)); + if (BIT(m_status, 0)) + { + // hng64 network MCU configures this supposedly invalid value and thrashes the scheduler if the timer is enabled + if (m_count == 0) + logerror("%s: Zero reload value specified for timer\n", machine().describe_context()); + else + m_count_timer->adjust(clocks_to_attotime(u32(m_count) + 1)); } // Count is now started whether or not it was before |