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Merge pull request #54 from hoglet67/Z80
Visual Z80: work towards interrupt support
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commit
74762264c1
@ -21,7 +21,11 @@ ab15: 20,
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_reset: 21,
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_wait: 22,
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_int: 23,
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int: 23,
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_irq: 23,
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irq: 23,
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_nmi: 24,
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nmi: 24,
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_busrq: 25,
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_m1: 26,
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_rd: 27,
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@ -110,7 +110,14 @@ var state = 0;
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var last_rd_done = 1;
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function handleBusRead(){
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if(!isNodeHigh(nodenames['_rd'])){
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if(!isNodeHigh(nodenames['_m1']) && !isNodeHigh(nodenames['_iorq'])) {
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// Interrupt acknownledge cycle, force 0xFF onto the bus
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// In IM0 this is seen as RST 0x38
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// In IM1 this is ignored
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// In IM2 this is used as the low byte of the vector
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// TODO: ideally this "vector" would be a configurable parameter
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writeDataBus(0xff);
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} else if(!isNodeHigh(nodenames['_rd'])){
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var a = readAddressBus();
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var d = eval(readTriggers[a]);
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if(d == undefined)
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