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ultra12f: Use swap_ranges to descramble ROM; add FDC; update notes (nw)

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This commit is contained in:
AJR 2019-04-08 14:14:34 -04:00
parent efebfce0bf
commit 9981d3bfb5
2 changed files with 14 additions and 8 deletions
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20
src/devices/bus/isa/ultra12f.cpp
View File

@ -4,6 +4,10 @@
UltraStor Ultra 12F ESDI Caching Disk Controller
Two versions of this card are known as 12F/24 and 12F/32. The hardware
differences between these apparently have to do with drive speed; the
same firmware and microcode may be applicable to both.
***************************************************************************/
#include "emu.h"
@ -15,6 +19,7 @@ ultra12f_device::ultra12f_device(const machine_config &mconfig, const char *tag,
: device_t(mconfig, ULTRA12F, tag, owner, clock)
, device_isa16_card_interface(mconfig, *this)
, m_hpc(*this, "hpc")
, m_fdc(*this, "fdc")
, m_bios(*this, "bios")
{
}
@ -25,13 +30,10 @@ void ultra12f_device::device_start()
u8 *firmware = memregion("firmware")->base();
for (offs_t b = 0; b < 0x8000; b += 0x100)
{
for (offs_t x = 0; x < 0x10; x++)
{
std::swap(firmware[b | x | 0x10], firmware[b | x | 0x80]);
std::swap(firmware[b | x | 0x30], firmware[b | x | 0xa0]);
std::swap(firmware[b | x | 0x50], firmware[b | x | 0xc0]);
std::swap(firmware[b | x | 0x70], firmware[b | x | 0xe0]);
}
std::swap_ranges(&firmware[b | 0x10], &firmware[b | 0x20], &firmware[b | 0x80]);
std::swap_ranges(&firmware[b | 0x30], &firmware[b | 0x40], &firmware[b | 0xa0]);
std::swap_ranges(&firmware[b | 0x50], &firmware[b | 0x60], &firmware[b | 0xc0]);
std::swap_ranges(&firmware[b | 0x70], &firmware[b | 0x80], &firmware[b | 0xe0]);
}
}
@ -42,8 +44,10 @@ void ultra12f_device::hpc_map(address_map &map)
void ultra12f_device::device_add_mconfig(machine_config &config)
{
HPC46003(config, m_hpc, 24_MHz_XTAL); // apparently a HPC46003V30 custom-labeled as "USC010-1-30"
HPC46003(config, m_hpc, 24_MHz_XTAL); // apparently a HPC46003V30 custom-marked as "USC010-1-30"
m_hpc->set_addrmap(AS_PROGRAM, &ultra12f_device::hpc_map);
DP8473(config, m_fdc, 24_MHz_XTAL); // unknown quad 52-pin floppy controller marked as "USC020-1-24"
}
ROM_START(ultra12f)

2
src/devices/bus/isa/ultra12f.h
View File

@ -13,6 +13,7 @@
#include "isa.h"
#include "cpu/hpc/hpc.h"
#include "machine/upd765.h"
class ultra12f_device : public device_t, public device_isa16_card_interface
{
@ -30,6 +31,7 @@ private:
void hpc_map(address_map &map);
required_device<hpc_device> m_hpc;
required_device<upd765_family_device> m_fdc;
required_region_ptr<u8> m_bios;
};