mirror of
https://github.com/holub/mame
synced 2025-07-06 10:29:38 +03:00
amigafdc: Upgrade [O. Galibert]
This commit is contained in:
Olivier Galibert
parent
974ea3d59e
commit
c965e4ad27
@ -164,6 +164,7 @@ EMUMACHINEOBJS = \
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$(EMUMACHINE)/adc1213x.o \
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$(EMUMACHINE)/am53cf96.o \
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$(EMUMACHINE)/am8530h.o \
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$(EMUMACHINE)/amigafdc.o \
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$(EMUMACHINE)/at28c16.o \
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$(EMUMACHINE)/cdp1852.o \
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$(EMUMACHINE)/cdp1871.o \
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@ -269,6 +269,7 @@ void floppy_image_device::stp_w(int state)
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} else {
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if ( cyl < tracks-1 ) cyl++;
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}
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/* Update disk detection if applicable */
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if (exists())
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{
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@ -286,14 +287,6 @@ int floppy_image_device::find_position(int position, const UINT32 *buf, int buf_
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step >>= 1;
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for(;;) {
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#if 0
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fprintf(stderr, "%09d - %09d / %09d -- %6d %6d %6d\n",
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position,
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spos < 0 ? 0 : spos >= buf_size ? 200000000 :buf[spos] & floppy_image::TIME_MASK,
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spos < 0 ? 0 : spos >= buf_size-1 ? 200000000 : buf[spos+1] & floppy_image::TIME_MASK,
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spos, step, buf_size);
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#endif
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if(spos >= buf_size || (spos > 0 && (buf[spos] & floppy_image::TIME_MASK) > position)) {
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spos -= step;
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step >>= 1;
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@ -328,7 +321,6 @@ attotime floppy_image_device::get_next_transition(attotime from_when)
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const UINT32 *buf = image->get_buffer(cyl, ss);
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int index = find_position(position, buf, cells);
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// fprintf(stderr, "position=%9d, index=%d\n", position, index);
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if(index == -1)
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return attotime::never;
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@ -340,6 +332,5 @@ attotime floppy_image_device::get_next_transition(attotime from_when)
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else
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next_position = 200000000 + (buf[1] & floppy_image::TIME_MASK);
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// printf("next_pos=%d, delta=%d\n", next_position, next_position-position);
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return base + attotime::from_nsec(next_position*(300/rpm));
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}
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@ -0,0 +1,454 @@
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/****************************************************f***********************
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Amiga floppy disk controller emulation
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***************************************************************************/
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#include "emu.h"
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#include "includes/amiga.h"
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#include "formats/ami_dsk.h"
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#include "formats/hxcmfm_dsk.h"
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#include "formats/ipf_dsk.h"
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#include "formats/mfi_dsk.h"
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#include "amigafdc.h"
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#include "machine/6526cia.h"
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const device_type AMIGA_FDC = &device_creator<amiga_fdc>;
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const floppy_format_type amiga_fdc::floppy_formats[] = {
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FLOPPY_ADF_FORMAT, FLOPPY_MFM_FORMAT, FLOPPY_IPF_FORMAT, FLOPPY_MFI_FORMAT,
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NULL
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};
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amiga_fdc::amiga_fdc(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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device_t(mconfig, AMIGA_FDC, "Amiga FDC", tag, owner, clock)
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{
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}
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void amiga_fdc::device_start()
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{
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floppy_devices[0] = machine().device<floppy_image_device>("fd0");
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floppy_devices[1] = machine().device<floppy_image_device>("fd1");
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floppy_devices[2] = machine().device<floppy_image_device>("fd2");
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floppy_devices[3] = machine().device<floppy_image_device>("fd3");
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floppy = 0;
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t_gen = timer_alloc(0);
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}
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void amiga_fdc::device_reset()
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{
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floppy = 0;
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dsklen = 0x4000;
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dsksync = 0x4489;
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adkcon = 0;
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dmacon = 0;
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dskpt = 0;
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dsklen = 0x4000;
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pre_dsklen = 0x4000;
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dma_value = 0;
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dma_state = DMA_IDLE;
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live_abort();
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}
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void amiga_fdc::live_start()
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{
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cur_live.tm = machine().time();
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cur_live.state = RUNNING;
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cur_live.next_state = -1;
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cur_live.shift_reg = 0;
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cur_live.bit_counter = 0;
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cur_live.pll.reset(cur_live.tm);
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cur_live.pll.set_clock(clocks_to_attotime(1));
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checkpoint_live = cur_live;
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live_run();
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}
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void amiga_fdc::checkpoint()
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{
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checkpoint_live = cur_live;
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}
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void amiga_fdc::rollback()
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{
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cur_live = checkpoint_live;
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}
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void amiga_fdc::live_delay(int state)
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{
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cur_live.next_state = state;
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t_gen->adjust(cur_live.tm - machine().time());
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}
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void amiga_fdc::live_sync()
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{
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if(!cur_live.tm.is_never()) {
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if(cur_live.tm > machine().time()) {
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rollback();
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live_run(machine().time());
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} else {
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if(cur_live.next_state != -1)
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cur_live.state = cur_live.next_state;
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if(cur_live.state == IDLE)
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cur_live.tm = attotime::never;
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}
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cur_live.next_state = -1;
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checkpoint();
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}
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}
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void amiga_fdc::live_abort()
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{
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cur_live.tm = attotime::never;
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cur_live.state = IDLE;
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cur_live.next_state = -1;
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}
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void amiga_fdc::live_run(attotime limit)
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{
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if(cur_live.state == IDLE || cur_live.next_state != -1)
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return;
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for(;;) {
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switch(cur_live.state) {
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case RUNNING: {
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int bit = cur_live.pll.get_next_bit(cur_live.tm, floppy, limit);
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if(bit < 0)
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return;
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cur_live.shift_reg = (cur_live.shift_reg << 1) | bit;
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cur_live.bit_counter++;
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if((adkcon & 0x0200) && !(cur_live.shift_reg & 0x80))
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cur_live.bit_counter--;
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if(cur_live.bit_counter == 8) {
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live_delay(RUNNING_SYNCPOINT);
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return;
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}
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if(dskbyt & 0x0400) {
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if(cur_live.shift_reg != dsksync) {
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live_delay(RUNNING_SYNCPOINT);
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return;
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}
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} else {
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if(cur_live.shift_reg == dsksync) {
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live_delay(RUNNING_SYNCPOINT);
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return;
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}
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}
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break;
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}
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case RUNNING_SYNCPOINT: {
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if(cur_live.shift_reg == dsksync) {
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if(adkcon & 0x0400) {
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if(dma_state == DMA_WAIT_START)
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dma_state = DMA_RUNNING_BYTE_0;
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cur_live.bit_counter = 0;
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}
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dskbyt |= 0x0400;
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address_space *space = machine().device("maincpu")->memory().space(AS_PROGRAM);
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amiga_custom_w(space, REG_INTREQ, 0x8000 | INTENA_DSKSYN, 0xffff);
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} else
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dskbyt &= ~0x0400;
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if(cur_live.bit_counter == 8) {
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dskbyt = (dskbyt & 0xff00) | 0x8000 | (cur_live.shift_reg & 0xff);
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cur_live.bit_counter = 0;
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switch(dma_state) {
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case DMA_IDLE:
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case DMA_WAIT_START:
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break;
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case DMA_RUNNING_BYTE_0:
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dma_value = (cur_live.shift_reg & 0xff) << 8;
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dma_state = DMA_RUNNING_BYTE_1;
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break;
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case DMA_RUNNING_BYTE_1: {
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dma_value |= cur_live.shift_reg & 0xff;
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amiga_state *state = machine().driver_data<amiga_state>();
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(*state->m_chip_ram_w)(state, dskpt, dma_value);
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dskpt += 2;
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dsklen--;
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if(dsklen & 0x3fff)
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dma_state = DMA_RUNNING_BYTE_0;
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else {
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dma_state = DMA_IDLE;
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address_space *space = machine().device("maincpu")->memory().space(AS_PROGRAM);
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amiga_custom_w(space, REG_INTREQ, 0x8000 | INTENA_DSKBLK, 0xffff);
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}
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break;
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}
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}
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}
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cur_live.state = RUNNING;
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checkpoint();
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break;
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}
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}
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}
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}
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bool amiga_fdc::dma_enabled()
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{
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return (dsklen & 0x8000) && ((dmacon & 0x0210) == 0x0210);
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}
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void amiga_fdc::dma_check()
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{
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if(dma_enabled() && (dsklen & 0x3fff)) {
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if(dma_state == IDLE)
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dma_state = adkcon & 0x0400 ? DMA_WAIT_START : DMA_RUNNING_BYTE_0;
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} else
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dma_state = IDLE;
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}
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void amiga_fdc::adkcon_set(UINT16 data)
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{
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live_sync();
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adkcon = data;
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}
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void amiga_fdc::dsklen_w(UINT16 data)
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{
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live_sync();
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if(!(data & 0x8000) || (data == pre_dsklen)) {
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dsklen = pre_dsklen = data;
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dma_check();
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dskbyt = dskbyt & 0x9fff;
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if(data & 0x4000)
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dskbyt |= 0x2000;
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if(dma_state != DMA_IDLE)
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dskbyt |= 0x4000;
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} else
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pre_dsklen = data;
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}
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void amiga_fdc::dskpth_w(UINT16 data)
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{
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live_sync();
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dskpt = (dskpt & 0xffff) | (data << 16);
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}
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void amiga_fdc::dskptl_w(UINT16 data)
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{
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live_sync();
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dskpt = (dskpt & 0xffff0000) | data;
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}
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UINT16 amiga_fdc::dskpth_r()
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{
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return dskpt >> 16;
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}
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UINT16 amiga_fdc::dskptl_r()
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{
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return dskpt;
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}
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void amiga_fdc::dsksync_w(UINT16 data)
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{
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live_sync();
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dsksync = data;
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}
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void amiga_fdc::dmacon_set(UINT16 data)
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{
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live_sync();
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dmacon = data;
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dma_check();
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dskbyt = dskbyt & 0xbfff;
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if(dma_state != DMA_IDLE)
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dskbyt |= 0x4000;
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}
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UINT16 amiga_fdc::dskbytr_r()
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{
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return dskbyt;
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}
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void amiga_fdc::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
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{
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live_sync();
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live_run();
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}
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void amiga_fdc::setup_leds()
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{
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if(floppy) {
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int drive =
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floppy == floppy_devices[0] ? 0 :
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floppy == floppy_devices[1] ? 1 :
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floppy == floppy_devices[2] ? 2 :
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3;
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output_set_value("drive_0_led", drive == 0);
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output_set_value("drive_1_led", drive == 1);
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output_set_value("drive_2_led", drive == 2);
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output_set_value("drive_3_led", drive == 3);
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set_led_status(machine(), 1, drive == 0); /* update internal drive led */
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set_led_status(machine(), 2, drive == 1); /* update external drive led */
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}
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}
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WRITE8_MEMBER( amiga_fdc::ciaaprb_w )
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{
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live_sync();
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if(!(data & 0x08))
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floppy = floppy_devices[0];
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else if(!(data & 0x10))
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floppy = floppy_devices[1];
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else if(!(data & 0x20))
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floppy = floppy_devices[2];
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else if(!(data & 0x40))
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floppy = floppy_devices[3];
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else
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floppy = 0;
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if(floppy) {
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floppy->ss_w(!((data >> 2) & 1));
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floppy->dir_w((data >> 1) & 1);
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floppy->stp_w(data & 1);
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floppy->mon_w((data >> 7) & 1);
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}
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if(floppy) {
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if(cur_live.state == IDLE)
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live_start();
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} else
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live_abort();
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setup_leds();
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}
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UINT8 amiga_fdc::ciaapra_r()
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{
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UINT8 ret = 0x3c;
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if(floppy) {
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// fixit
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ret &= ~0x20;
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if(!floppy->trk00_r())
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ret &= ~0x10;
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if(!floppy->wpt_r())
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ret &= ~0x08;
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if(!floppy->dskchg_r())
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ret &= ~0x04;
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}
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return ret;
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}
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void amiga_fdc::index_callback(floppy_image_device *floppy, int state)
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{
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/* Issue a index pulse when a disk revolution completes */
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device_t *cia = machine().device("cia_1");
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mos6526_flag_w(cia, state);
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}
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void amiga_fdc::pll_t::set_clock(attotime period)
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{
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for(int i=0; i<38; i++)
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delays[i] = period*(i+1);
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}
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void amiga_fdc::pll_t::reset(attotime when)
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{
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counter = 0;
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increment = 146;
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transition_time = 0xffff;
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history = 0x80;
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slot = 0;
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ctime = when;
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phase_add = 0x00;
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phase_sub = 0x00;
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freq_add = 0x00;
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freq_sub = 0x00;
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}
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int amiga_fdc::pll_t::get_next_bit(attotime &tm, floppy_image_device *floppy, attotime limit)
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{
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attotime when = floppy ? floppy->get_next_transition(ctime) : attotime::never;
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for(;;) {
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attotime etime = ctime+delays[slot];
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if(etime > limit)
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return -1;
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if(transition_time == 0xffff && !when.is_never() && etime >= when)
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transition_time = counter;
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if(slot < 8) {
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UINT8 mask = 1 << slot;
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if(phase_add & mask)
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counter += 258;
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else if(phase_sub & mask)
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counter += 34;
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else
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counter += increment;
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if((freq_add & mask) && increment < 159)
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increment++;
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else if((freq_sub & mask) && increment > 134)
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increment--;
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} else
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counter += increment;
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slot++;
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tm = etime;
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if(counter & 0x800)
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break;
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}
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int bit = transition_time != 0xffff;
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if(transition_time != 0xffff) {
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static const UINT8 pha[8] = { 0xf, 0x7, 0x3, 0x1, 0, 0, 0, 0 };
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static const UINT8 phs[8] = { 0, 0, 0, 0, 0x1, 0x3, 0x7, 0xf };
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static const UINT8 freqa[4][8] = {
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{ 0xf, 0x7, 0x3, 0x1, 0, 0, 0, 0 },
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{ 0x7, 0x3, 0x1, 0, 0, 0, 0, 0 },
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{ 0x7, 0x3, 0x1, 0, 0, 0, 0, 0 },
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{ 0, 0, 0, 0, 0, 0, 0, 0 }
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};
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static const UINT8 freqs[4][8] = {
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{ 0, 0, 0, 0, 0, 0, 0, 0 },
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{ 0, 0, 0, 0, 0, 0x1, 0x3, 0x7 },
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{ 0, 0, 0, 0, 0, 0x1, 0x3, 0x7 },
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{ 0, 0, 0, 0, 0x1, 0x3, 0x7, 0xf },
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};
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int cslot = transition_time >> 8;
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phase_add = pha[cslot];
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phase_sub = phs[cslot];
|
||||
int way = transition_time & 0x400 ? 1 : 0;
|
||||
if(history & 0x80)
|
||||
history = way ? 0x80 : 0x83;
|
||||
else if(history & 0x40)
|
||||
history = way ? history & 2 : (history & 2) | 1;
|
||||
freq_add = freqa[history & 3][cslot];
|
||||
freq_sub = freqs[history & 3][cslot];
|
||||
history = way ? (history >> 1) | 2 : history >> 1;
|
||||
|
||||
} else
|
||||
phase_add = phase_sub = freq_add = freq_sub = 0;
|
||||
|
||||
counter &= 0x7ff;
|
||||
|
||||
ctime = tm;
|
||||
transition_time = 0xffff;
|
||||
slot = 0;
|
||||
|
||||
return bit;
|
||||
}
|
||||
@ -0,0 +1,103 @@
|
||||
#ifndef AMIGAFDC_H
|
||||
#define AMIGAFDC_H
|
||||
|
||||
#include "emu.h"
|
||||
#include "imagedev/floppy.h"
|
||||
|
||||
#define MCFG_AMIGA_FDC_ADD(_tag, _clock) \
|
||||
MCFG_DEVICE_ADD(_tag, AMIGA_FDC, _clock)
|
||||
|
||||
class amiga_fdc : public device_t {
|
||||
public:
|
||||
amiga_fdc(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
|
||||
|
||||
DECLARE_WRITE8_MEMBER(ciaaprb_w);
|
||||
|
||||
UINT8 ciaapra_r();
|
||||
UINT16 dskbytr_r();
|
||||
UINT16 dskpth_r();
|
||||
UINT16 dskptl_r();
|
||||
|
||||
void dsksync_w(UINT16 data);
|
||||
void dskpth_w(UINT16 data);
|
||||
void dskptl_w(UINT16 data);
|
||||
void dsklen_w(UINT16 data);
|
||||
void adkcon_set(UINT16 data);
|
||||
void dmacon_set(UINT16 data);
|
||||
|
||||
static const floppy_format_type floppy_formats[];
|
||||
|
||||
protected:
|
||||
virtual void device_start();
|
||||
virtual void device_reset();
|
||||
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
|
||||
|
||||
private:
|
||||
// Running states
|
||||
enum {
|
||||
IDLE,
|
||||
RUNNING,
|
||||
RUNNING_SYNCPOINT
|
||||
};
|
||||
|
||||
// DMA states
|
||||
enum {
|
||||
DMA_IDLE,
|
||||
DMA_WAIT_START,
|
||||
DMA_RUNNING_BYTE_0,
|
||||
DMA_RUNNING_BYTE_1
|
||||
};
|
||||
|
||||
struct pll_t {
|
||||
UINT16 counter;
|
||||
UINT16 increment;
|
||||
UINT16 transition_time;
|
||||
UINT8 history;
|
||||
UINT8 slot;
|
||||
UINT8 phase_add, phase_sub, freq_add, freq_sub;
|
||||
attotime ctime;
|
||||
|
||||
attotime delays[38];
|
||||
|
||||
void set_clock(attotime period);
|
||||
void reset(attotime when);
|
||||
int get_next_bit(attotime &tm, floppy_image_device *floppy, attotime limit);
|
||||
};
|
||||
|
||||
struct live_info {
|
||||
attotime tm;
|
||||
int state, next_state;
|
||||
UINT16 shift_reg;
|
||||
int bit_counter;
|
||||
pll_t pll;
|
||||
};
|
||||
|
||||
floppy_image_device *floppy;
|
||||
floppy_image_device *floppy_devices[4];
|
||||
|
||||
live_info cur_live, checkpoint_live;
|
||||
|
||||
emu_timer *t_gen;
|
||||
UINT16 dsklen, pre_dsklen, dsksync, dskbyt, adkcon, dmacon;
|
||||
UINT32 dskpt;
|
||||
UINT16 dma_value;
|
||||
|
||||
int dma_state;
|
||||
|
||||
void setup_leds();
|
||||
void index_callback(floppy_image_device *floppy, int state);
|
||||
bool dma_enabled();
|
||||
void dma_check();
|
||||
|
||||
void live_start();
|
||||
void checkpoint();
|
||||
void rollback();
|
||||
void live_delay(int state);
|
||||
void live_sync();
|
||||
void live_abort();
|
||||
void live_run(attotime limit = attotime::never);
|
||||
};
|
||||
|
||||
extern const device_type AMIGA_FDC;
|
||||
|
||||
#endif /* AMIGAFDC_H */
|
||||
@ -685,7 +685,7 @@ static void alg_init(running_machine &machine)
|
||||
{
|
||||
ANGUS_CHIP_RAM_MASK,
|
||||
NULL, NULL, alg_potgo_w,
|
||||
NULL, NULL, serial_w,
|
||||
serial_w,
|
||||
|
||||
vsync_callback,
|
||||
NULL,
|
||||
|
||||
@ -793,7 +793,7 @@ static void arcadia_init(running_machine &machine)
|
||||
{
|
||||
ANGUS_CHIP_RAM_MASK,
|
||||
NULL, NULL, NULL,
|
||||
NULL, NULL, NULL,
|
||||
NULL,
|
||||
NULL, arcadia_reset_coins,
|
||||
NULL,
|
||||
0
|
||||
|
||||
@ -834,7 +834,7 @@ static DRIVER_INIT( cd32 )
|
||||
{
|
||||
AGA_CHIP_RAM_MASK,
|
||||
NULL, NULL, cd32_potgo_w,
|
||||
NULL, NULL, NULL,
|
||||
NULL,
|
||||
NULL, NULL,
|
||||
NULL,
|
||||
FLAGS_AGA_CHIPSET
|
||||
@ -1454,7 +1454,7 @@ static DRIVER_INIT( odeontw2 )
|
||||
{
|
||||
AGA_CHIP_RAM_MASK,
|
||||
NULL, NULL, cd32_potgo_w,
|
||||
NULL, NULL, serial_w,
|
||||
serial_w,
|
||||
NULL, NULL,
|
||||
NULL,
|
||||
FLAGS_AGA_CHIPSET
|
||||
|
||||
@ -433,7 +433,7 @@ static DRIVER_INIT(mquake)
|
||||
{
|
||||
ANGUS_CHIP_RAM_MASK,
|
||||
NULL, NULL, NULL,
|
||||
NULL, NULL, NULL,
|
||||
NULL,
|
||||
NULL, NULL,
|
||||
NULL,
|
||||
0
|
||||
|
||||
@ -390,7 +390,7 @@ static DRIVER_INIT( upscope )
|
||||
{
|
||||
ANGUS_CHIP_RAM_MASK,
|
||||
NULL, NULL, NULL,
|
||||
NULL, NULL, NULL,
|
||||
NULL,
|
||||
NULL, upscope_reset,
|
||||
NULL,
|
||||
0
|
||||
|
||||
@ -97,7 +97,7 @@ Ernesto Corvi & Mariusz Wojcieszek
|
||||
#define REG_BLTBDAT (0x072/2) /* W A Blitter source B data reglster */
|
||||
#define REG_BLTADAT (0x074/2) /* W A Blitter source A data register */
|
||||
#define REG_DENISEID (0x07C/2) /* R D Denise ID: OCS = 0xFF, ECS = 0xFC, AGA = 0xF8 */
|
||||
#define REG_DSRSYNC (0x07E/2) /* W P Disk sync pattern register for disk read */
|
||||
#define REG_DSKSYNC (0x07E/2) /* W P Disk sync pattern register for disk read */
|
||||
#define REG_COP1LCH (0x080/2) /* W A Coprocessor first location register (high 3 bits) */
|
||||
#define REG_COP1LCL (0x082/2) /* W A Coprocessor first location register (low 15 bits) */
|
||||
#define REG_COP2LCH (0x084/2) /* W A Coprocessor second location register (high 3 bits) */
|
||||
@ -329,9 +329,6 @@ struct _amiga_machine_interface
|
||||
UINT16 (*joy1dat_r)(running_machine &machine);
|
||||
void (*potgo_w)(running_machine &machine, UINT16 data);
|
||||
|
||||
UINT16 (*dskbytr_r)(running_machine &machine);
|
||||
void (*dsklen_w)(running_machine &machine, UINT16 data);
|
||||
|
||||
void (*serdat_w)(running_machine &machine, UINT16 data);
|
||||
|
||||
void (*scanline0_callback)(running_machine &machine);
|
||||
|
||||
@ -12,7 +12,7 @@
|
||||
#include "includes/amiga.h"
|
||||
#include "cpu/m68000/m68000.h"
|
||||
#include "machine/6526cia.h"
|
||||
|
||||
#include "machine/amigafdc.h"
|
||||
|
||||
/*************************************
|
||||
*
|
||||
@ -1181,9 +1181,6 @@ READ16_HANDLER( amiga_custom_r )
|
||||
return (*state->m_intf->joy1dat_r)(space->machine());
|
||||
return input_port_read_safe(space->machine(), "JOY1DAT", 0xffff);
|
||||
|
||||
case REG_ADKCONR:
|
||||
return CUSTOM_REG(REG_ADKCON);
|
||||
|
||||
case REG_POTGOR:
|
||||
return input_port_read_safe(space->machine(), "POTGO", 0x5500);
|
||||
|
||||
@ -1194,9 +1191,7 @@ READ16_HANDLER( amiga_custom_r )
|
||||
return input_port_read_safe(space->machine(), "POT1DAT", 0x0000);
|
||||
|
||||
case REG_DSKBYTR:
|
||||
if (state->m_intf->dskbytr_r != NULL)
|
||||
return (*state->m_intf->dskbytr_r)(space->machine());
|
||||
return 0x0000;
|
||||
return space->machine().device<amiga_fdc>("fdc")->dskbytr_r();
|
||||
|
||||
case REG_INTENAR:
|
||||
return CUSTOM_REG(REG_INTENA);
|
||||
@ -1219,6 +1214,12 @@ READ16_HANDLER( amiga_custom_r )
|
||||
|
||||
case REG_DENISEID:
|
||||
return CUSTOM_REG(REG_DENISEID);
|
||||
|
||||
case REG_DSKPTH:
|
||||
return space->machine().device<amiga_fdc>("fdc")->dskpth_r();
|
||||
|
||||
case REG_DSKPTL:
|
||||
return space->machine().device<amiga_fdc>("fdc")->dskptl_r();
|
||||
}
|
||||
|
||||
if (LOG_CUSTOM)
|
||||
@ -1267,9 +1268,20 @@ WRITE16_HANDLER( amiga_custom_w )
|
||||
/* read-only registers */
|
||||
break;
|
||||
|
||||
case REG_DSKSYNC:
|
||||
space->machine().device<amiga_fdc>("fdc")->dsksync_w(data);
|
||||
break;
|
||||
|
||||
case REG_DSKPTH:
|
||||
space->machine().device<amiga_fdc>("fdc")->dskpth_w(data);
|
||||
break;
|
||||
|
||||
case REG_DSKPTL:
|
||||
space->machine().device<amiga_fdc>("fdc")->dskptl_w(data);
|
||||
break;
|
||||
|
||||
case REG_DSKLEN:
|
||||
if (state->m_intf->dsklen_w != NULL)
|
||||
(*state->m_intf->dsklen_w)(space->machine(), data);
|
||||
space->machine().device<amiga_fdc>("fdc")->dsklen_w(data);
|
||||
break;
|
||||
|
||||
case REG_POTGO:
|
||||
@ -1372,7 +1384,8 @@ WRITE16_HANDLER( amiga_custom_w )
|
||||
/* bits BBUSY (14) and BZERO (13) are read-only */
|
||||
data &= 0x9fff;
|
||||
data = (data & 0x8000) ? (CUSTOM_REG(offset) | (data & 0x7fff)) : (CUSTOM_REG(offset) & ~(data & 0x7fff));
|
||||
|
||||
space->machine().device<amiga_fdc>("fdc")->dmacon_set(data);
|
||||
|
||||
/* if 'blitter-nasty' has been turned on and we have a blit pending, reschedule it */
|
||||
if ( ( data & 0x400 ) && ( CUSTOM_REG(REG_DMACON) & 0x4000 ) )
|
||||
state->m_blitter_timer->adjust( downcast<cpu_device *>(&space->device())->cycles_to_attotime( BLITTER_NASTY_DELAY ));
|
||||
@ -1413,6 +1426,7 @@ WRITE16_HANDLER( amiga_custom_w )
|
||||
case REG_ADKCON:
|
||||
amiga_audio_update(state->m_sound_device);
|
||||
data = (data & 0x8000) ? (CUSTOM_REG(offset) | (data & 0x7fff)) : (CUSTOM_REG(offset) & ~(data & 0x7fff));
|
||||
space->machine().device<amiga_fdc>("fdc")->adkcon_set(data);
|
||||
break;
|
||||
|
||||
case REG_AUD0LCL: case REG_AUD0LCH: case REG_AUD0LEN: case REG_AUD0PER: case REG_AUD0VOL:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user