diff options
Diffstat (limited to 'src/devices/sound/swp30d.cpp')
| -rw-r--r-- | src/devices/sound/swp30d.cpp | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/src/devices/sound/swp30d.cpp b/src/devices/sound/swp30d.cpp deleted file mode 100644 index df76426c462..00000000000 --- a/src/devices/sound/swp30d.cpp +++ /dev/null @@ -1,172 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Olivier Galibert - -// Yamaha SWP30 - Multiple effects generator subpart -// -// Audio dsp dedicated to effects generation -// -// Disassembler - -// Known problems with the mu100 bios0 uploaded programs: -// -// At address 94 & 97, there's a missing r78 = p / r79 = p -// respectively. Those are places where is both a rnn = p and mnn = p -// -// insertion1 rooms, at addresses cd, cf, d0, d2, d4, d5, dc, e3, e7 -// the r slots have data but are not used. No idea how they should be -// used. -// -// Same for insertion2 rooms, addresses fd+ -// -// Insertion 1/2 aural have a bunch of instructions (c7-ce, f7-fe) -// using r02-r09 and r28/r3a which are not understood. -// - -// Amplitude lfo is missing something. For instance variation delay -// m34 is loaded at 120 and used at 13c, but the way it is used is not -// decoded. In practice, we do not yet have a way to multiply two -// registers together, only with a constant. - -// insertion phaser - -// y0 = x1 + (y1 - x0) * lfo - -// x = r4a -// y = r4b - -// 14f: -// 66665555 55555544 44444444 33333333 33222222 22221111 11111100 00000000 -// 32109876 54321098 76543210 98765432 10987654 32109876 54321098 76543210 - -// XLB--ttt -rrrrrrr -xlmmmmm m-MM---- -P----** *--T-Arr rrrrrsmm mmmm---- -// 0000000003c25000 ........ ........ ........ ........ ......11 11....1. .1.1.... ........ p = 0 * x1 -// 0100000004925800 .......1 ........ ........ ........ .....1.. 1..1..1. .1.11... ........ p += 0 * y1 -// 014b000044925400 .......1 .1..1.11 ........ ........ .1...1.. 1..1..1. .1.1.1.. ........ p += 0 * x0 ; y0 = p - -// 0000000000805800 ........ ........ ........ ........ ........ 1....... .1.11... ........ p += fp48a * r0b; -// 0000000003822800 ........ ........ ........ ........ ......11 1.....1. ..1.1... ........ p = f1_2_c1 * r45; - -// Important detail: the writes to register (rnn and mnn) seem to be -// delayed by 2 cycles. That makes the filter computation work out. - - -#include "emu.h" -#include "swp30d.h" - -swp30_disassembler::swp30_disassembler(info *inf) : m_info(inf) -{ -} - -u32 swp30_disassembler::opcode_alignment() const -{ - return 1; -} - -std::string swp30_disassembler::gconst(offs_t address) const -{ - if(!m_info) - return util::string_format("c%03x", address); - s16 value = m_info->swp30d_const_r(address); - return util::string_format("%g", value / 16384.0); -} - -std::string swp30_disassembler::goffset(offs_t address) const -{ - return m_info ? util::string_format("%x", m_info->swp30d_offset_r(address)) : util::string_format("of%02x", address); -} - -u32 swp30_disassembler::b(u64 opc, u32 start, u32 count) -{ - return (opc >> start) & ((1 << count) - 1); -} - -void swp30_disassembler::append(std::string &r, const std::string &e) -{ - if(r != "") - r += " ; "; - r += e; -} - -// 33333333 33333333 22222222 22222222 11111111 11111111 00000000 00000000 -// fedcba98 76543210 fedcba98 76543210 fedcba98 76543210 fedcba98 76543210 - -// 66665555 55555544 44444444 33333333 33222222 22221111 11111100 00000000 -// 32109876 54321098 76543210 98765432 10987654 32109876 54321098 76543210 -// XLB----- -rrrrrrr -xlmmmmm m-MM---- -P----** *c---Arr rrrrrsmm mmmm---- - -// m = low is read port, high is write port, memory register -// r = low is read port, high is write port, rotating register - -// X = used for lo-fi variation only -// L = lfo read for memory offset -// * = compute mul + mode -// A = mul input = m or r -// s = substract to p instead of adding -// P = P sent for register write -// B = register write to mbuf -// M = memory mode, none/read/write/read+1 -// x = 0 register write to memory, 1 to rotating -// l = 0 = lfo sent for register write - -offs_t swp30_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer ¶ms) -{ - u64 opc = opcodes.r64(pc); - - std::string r; - - if(b(opc, 62, 1)) - append(r, util::string_format("m%02x = lfo.%02x", b(opc, 4, 6), pc >> 4)); - - if(b(opc, 23, 1)) - switch(b(opc, 24, 2)) { - case 0: - if(b(opc, 18, 1)) - append(r, util::string_format("p %c= %s*m%02x", b(opc, 10, 1) ? '-' : '+', gconst(pc), b(opc, 4, 6))); - else - append(r, util::string_format("p %c= %s*r%02x", b(opc, 10, 1) ? '-' : '+', gconst(pc), b(opc, 11, 7))); - break; - case 1: - append(r, util::string_format("p %c= %s*(r%02x+m%02x)", b(opc, 10, 1) ? '-' : '+', gconst(pc), b(opc, 11, 7), b(opc, 4, 6))); - break; - case 2: - append(r, util::string_format("p = %s*(r%02x+m%02x)", gconst(pc), b(opc, 11, 7), b(opc, 4, 6))); - break; - case 3: - if(b(opc, 18, 1)) - append(r, util::string_format("p = %s*m%02x", gconst(pc), b(opc, 4, 6))); - else - append(r, util::string_format("p = %s*r%02x", gconst(pc), b(opc, 11, 7))); - break; - } - - if(b(opc, 62, 1)) - append(r, util::string_format("idx = p*4000")); - - if(b(opc, 30, 1) == 1 && b(opc, 61, 1) == 1) - append(r, util::string_format("mw = p")); - - if(b(opc, 30, 1) == 1 && b(opc, 61, 1) == 0 && b(opc, 46, 1) == 1 && b(opc, 62, 1) == 0) - append(r, util::string_format("m%02x = p", b(opc, 39, 6))); - - if(b(opc, 30, 1) == 1 && b(opc, 61, 1) == 0 && b(opc, 46, 1) == 0) - append(r, util::string_format("r%02x = p", b(opc, 48, 7))); - - if(b(opc, 30, 1) == 0 && b(opc, 45, 2) == 2) - append(r, util::string_format("m%02x = lfo.%02x", b(opc, 39, 6), pc >> 4)); - - if(b(opc, 30, 1) == 0 && b(opc, 45, 2) == 3) - append(r, util::string_format("m%02x = m%02x", b(opc, 39, 6), b(opc, 4, 6))); - - if(b(opc, 46, 2) == 2) - append(r, util::string_format("m%02x = mr", b(opc, 39, 6))); - - u32 memmode = b(opc, 36, 2); - if(memmode) { - static const char *modes[4] = { nullptr, "w", "r", "1r" }; - append(r, util::string_format("mem_%s %x +%s", modes[memmode], b(opc, 33, 3), goffset(pc/3))); - } - - stream << r; - - return 1 | SUPPORTED; -} |
