diff options
Diffstat (limited to 'src/mess/machine/nextmo.c')
-rw-r--r-- | src/mess/machine/nextmo.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/src/mess/machine/nextmo.c b/src/mess/machine/nextmo.c deleted file mode 100644 index 20cfba9aa6c..00000000000 --- a/src/mess/machine/nextmo.c +++ /dev/null @@ -1,198 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Olivier Galibert - -#include "emu.h" -#include "nextmo.h" - -const device_type NEXTMO = &device_creator<nextmo_device>; - -DEVICE_ADDRESS_MAP_START(map, 8, nextmo_device) - AM_RANGE(0x04, 0x04) AM_READWRITE(r4_r, r4_w) - AM_RANGE(0x05, 0x05) AM_READWRITE(r5_r, r5_w) - AM_RANGE(0x06, 0x06) AM_READWRITE(r6_r, r6_w) - AM_RANGE(0x07, 0x07) AM_READWRITE(r7_r, r7_w) - AM_RANGE(0x08, 0x08) AM_READWRITE(r8_r, r8_w) - AM_RANGE(0x09, 0x09) AM_READWRITE(r9_r, r9_w) - AM_RANGE(0x0a, 0x0a) AM_READWRITE(ra_r, ra_w) - AM_RANGE(0x0b, 0x0b) AM_READWRITE(rb_r, rb_w) - AM_RANGE(0x10, 0x17) AM_READWRITE(r10_r, r10_w) -ADDRESS_MAP_END - -nextmo_device::nextmo_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : - device_t(mconfig, NEXTMO, "NeXT Magneto-optical drive", tag, owner, clock, "nextmo", __FILE__), - r4(0), - irq_cb(*this), - drq_cb(*this) -{ -} - -void nextmo_device::device_start() -{ - irq_cb.resolve_safe(); - drq_cb.resolve_safe(); -} - -void nextmo_device::device_reset() -{ -} - -READ8_MEMBER(nextmo_device::r4_r) -{ - logerror("nextmo: r4_r %02x (%08x)\n", r4, space.device().safe_pc()); - return r4; -} - -WRITE8_MEMBER(nextmo_device::r4_w) -{ - if(r4 & 1) - device_reset(); - r4 = (r4 & (~data & 0xfc)) | (data & 3); - logerror("nextmo: r4_w %02x (%08x)\n", r4, space.device().safe_pc()); -} - -READ8_MEMBER(nextmo_device::r5_r) -{ - logerror("nextmo: r5_r %02x (%08x)\n", r5, space.device().safe_pc()); - return r5; -} - -WRITE8_MEMBER(nextmo_device::r5_w) -{ - r5 = data; - logerror("nextmo: r5_w %02x (%08x)\n", r5, space.device().safe_pc()); -} - -READ8_MEMBER(nextmo_device::r6_r) -{ - logerror("nextmo: r6_r %02x (%08x)\n", r6, space.device().safe_pc()); - return r6; -} - -WRITE8_MEMBER(nextmo_device::r6_w) -{ - r6 = data; - logerror("nextmo: r6_w %02x (%08x)\n", r6, space.device().safe_pc()); -} - -READ8_MEMBER(nextmo_device::r7_r) -{ - logerror("nextmo: r7_r %02x (%08x)\n", r7, space.device().safe_pc()); - return r7; -} - -WRITE8_MEMBER(nextmo_device::r7_w) -{ - r7 = data; - logerror("nextmo: r7_w %02x (%08x)\n", r7, space.device().safe_pc()); - if(r7 & 0xc0) { - logerror("nextmo: start dma %02x %02x\n", r6, r7); - sector_pos = 0; - if(!drq_cb.isnull()) - drq_cb(true); - } -} - -UINT8 nextmo_device::dma_r() -{ - UINT8 r = 0; - if(r7 & 0x80) - r = sector[sector_pos++]; - check_dma_end(); - return r; -} - -void nextmo_device::dma_w(UINT8 data) -{ - if(r7 & 0x40) - sector[sector_pos++] = data; - check_dma_end(); -} - -void nextmo_device::check_dma_end() -{ - int limit; - if(r7 & 0x40) - limit = r6 & 0x20 ? 0x510 : 0x400; - else - limit = r6 & 0x20 ? 0x400 : 0x510; - if(sector_pos == limit) { - if(!drq_cb.isnull()) - drq_cb(false); - if(r7 & 0x40) { - if(r6 & 0x20) - check_ecc(); - else - compute_ecc(); - } - r7 &= 0x3f; - r4 |= 0x08; - } -} - -READ8_MEMBER(nextmo_device::r8_r) -{ - logerror("nextmo: r8_r (%08x)\n", space.device().safe_pc()); - return 0x00; -} - -WRITE8_MEMBER(nextmo_device::r8_w) -{ - logerror("nextmo: r8_w %02x (%08x)\n", data, space.device().safe_pc()); -} - -READ8_MEMBER(nextmo_device::r9_r) -{ - logerror("nextmo: r9_r (%08x)\n", space.device().safe_pc()); - return 0x00; -} - -WRITE8_MEMBER(nextmo_device::r9_w) -{ - logerror("nextmo: r9_w %02x (%08x)\n", data, space.device().safe_pc()); -} - -READ8_MEMBER(nextmo_device::ra_r) -{ - logerror("nextmo: ra_r (%08x)\n", space.device().safe_pc()); - return 0x00; -} - -WRITE8_MEMBER(nextmo_device::ra_w) -{ - logerror("nextmo: ra_w %02x (%08x)\n", data, space.device().safe_pc()); -} - -READ8_MEMBER(nextmo_device::rb_r) -{ - logerror("nextmo: rb_r (%08x)\n", space.device().safe_pc()); - return 0x24; -} - -WRITE8_MEMBER(nextmo_device::rb_w) -{ - logerror("nextmo: rb_w %02x (%08x)\n", data, space.device().safe_pc()); -} - -READ8_MEMBER(nextmo_device::r10_r) -{ - logerror("nextmo: r10_r %d (%08x)\n", offset, space.device().safe_pc()); - return 0x00; -} - -WRITE8_MEMBER(nextmo_device::r10_w) -{ - logerror("nextmo: r10_w %d, %02x (%08x)\n", offset, data, space.device().safe_pc()); -} - -void nextmo_device::check_ecc() -{ - logerror("nextmo: check_ecc\n"); - for(int i=0; i<0x400; i++) - sector[i] = i; -} - -void nextmo_device::compute_ecc() -{ - logerror("nextmo: compute_ecc\n"); - memset(sector+0x400, 0, 0x110); -} |