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Corrects raster race condition with CPU.

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This commit is contained in:
Thomas Harte 2019-11-07 23:27:05 -05:00
parent 68f9084d9e
commit 5d5dc79f2c
1 changed files with 2 additions and 0 deletions
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2
Machines/AtariST/AtariST.cpp
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@ -339,9 +339,11 @@ class ConcreteMachine:
cycle.value->halves.low = uint8_t(memory[address] >> cycle.byte_shift());
break;
case Microcycle::SelectWord:
video_.flush(); // TODO: (and below), a range check to determine whether this is really necesary.
memory[address] = cycle.value->full;
break;
case Microcycle::SelectByte:
video_.flush();
memory[address] = uint16_t(
(cycle.value->halves.low << cycle.byte_shift()) |
(memory[address] & cycle.untouched_byte_mask())