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Fix: DMA channel selection using first two bits

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The bit masks has been corrected from 0x4 to 0x3.
This commit is contained in:
Ernest Wong 2017-11-18 11:45:27 +13:00 committed by Fabian
parent e44f44be93
commit ef02bafa6f
1 changed files with 2 additions and 2 deletions
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4
src/dma.js
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@ -100,7 +100,7 @@ DMA.prototype.port_page_read = function(channel)
DMA.prototype.port_singlemask_write = function(channel_offset, data_byte)
{
var channel = data_byte & 0x4 + channel_offset;
var channel = data_byte & 0x3 + channel_offset;
var value = !!(data_byte & 0x8);
dbg_log("singlechannel mask write [" + channel + "] = " + value, LOG_DMA);
this.update_mask(channel, value);
@ -128,7 +128,7 @@ DMA.prototype.port_multimask_read = function(channel_offset)
DMA.prototype.port_mode_write = function(channel_offset, data_byte)
{
var channel = data_byte & 0x4 + channel_offset;
var channel = data_byte & 0x3 + channel_offset;
dbg_log("mode write [" + channel + "] = " + h(data_byte), LOG_DMA);
this.channel_mode[channel] = data_byte;
}