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Implement page high-byte EISA ports/registers (DMA)

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Ernest Wong 2017-11-19 21:34:19 +13:00 committed by Fabian
parent 34d60d42bc
commit a218381dc7
1 changed files with 30 additions and 0 deletions
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30
src/dma.js
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@ -10,6 +10,7 @@ function DMA(cpu)
this.cpu = cpu;
this.channel_page = new Uint8Array(8);
this.channel_pagehi = new Uint8Array(8);
this.channel_addr = new Uint16Array(8);
this.channel_addr_init = new Uint16Array(8);
this.channel_count = new Uint16Array(8);
@ -76,6 +77,22 @@ function DMA(cpu)
io.register_read(0x89, this, this.port_page_read.bind(this, 6));
io.register_read(0x8A, this, this.port_page_read.bind(this, 7));
io.register_write(0x487, this, this.port_pagehi_write.bind(this, 0));
io.register_write(0x483, this, this.port_pagehi_write.bind(this, 1));
io.register_write(0x481, this, this.port_pagehi_write.bind(this, 2));
io.register_write(0x482, this, this.port_pagehi_write.bind(this, 3));
io.register_write(0x48B, this, this.port_pagehi_write.bind(this, 5));
io.register_write(0x489, this, this.port_pagehi_write.bind(this, 6));
io.register_write(0x48A, this, this.port_pagehi_write.bind(this, 7));
io.register_read(0x487, this, this.port_pagehi_read.bind(this, 0));
io.register_read(0x483, this, this.port_pagehi_read.bind(this, 1));
io.register_read(0x481, this, this.port_pagehi_read.bind(this, 2));
io.register_read(0x482, this, this.port_pagehi_read.bind(this, 3));
io.register_read(0x48B, this, this.port_pagehi_read.bind(this, 5));
io.register_read(0x489, this, this.port_pagehi_read.bind(this, 6));
io.register_read(0x48A, this, this.port_pagehi_read.bind(this, 7));
io.register_write(0x0A, this, this.port_singlemask_write.bind(this, 0));
io.register_write(0xD4, this, this.port_singlemask_write.bind(this, 4));
io.register_write(0x0F, this, this.port_multimask_write.bind(this, 0));
@ -141,6 +158,18 @@ DMA.prototype.port_addr_read = function(channel)
return this.flipflop_read(this.channel_addr[channel]);
}
DMA.prototype.port_pagehi_write = function(channel, data_byte)
{
dbg_log("pagehi write [" + channel + "] = " + h(data_byte), LOG_DMA);
this.channel_pagehi[channel] = data_byte;
}
DMA.prototype.port_pagehi_read = function(channel)
{
dbg_log("pagehi read [" + channel + "]", LOG_DMA);
return this.channel_pagehi[channel];
}
DMA.prototype.port_page_write = function(channel, data_byte)
{
dbg_log("page write [" + channel + "] = " + h(data_byte), LOG_DMA);
@ -388,6 +417,7 @@ DMA.prototype.address_get_8bit = function(channel)
addr &= 0xFFFF;
addr |= this.channel_page[channel] << 16;
addr |= this.channel_pagehi[channel] << 24;
return addr;
}