Mercurial > repos > blastem
view z80_util.c @ 1749:e4fe5a450d05
Added option to CPU DSL to produce a threaded interpreter using computed goto
author | Michael Pavone <pavone@retrodev.com> |
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date | Fri, 08 Feb 2019 23:09:58 -0800 |
parents | 48a43dff4dc0 |
children | 01236179fc71 |
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#include <string.h> void z80_read_8(z80_context *context) { context->cycles += 3 * context->opts->gen.clock_divider; context->scratch1 = read_byte(context->scratch1, NULL, &context->opts->gen, context); } void z80_write_8(z80_context *context) { context->cycles += 3 * context->opts->gen.clock_divider; write_byte(context->scratch2, context->scratch1, NULL, &context->opts->gen, context); } void z80_io_read8(z80_context *context) { uint32_t tmp_mask = context->opts->gen.address_mask; memmap_chunk const *tmp_map = context->opts->gen.memmap; uint32_t tmp_chunks = context->opts->gen.memmap_chunks; context->opts->gen.address_mask = context->io_mask; context->opts->gen.memmap = context->io_map; context->opts->gen.memmap_chunks = context->io_chunks; context->scratch1 = read_byte(context->scratch1, NULL, &context->opts->gen, context); context->opts->gen.address_mask = tmp_mask; context->opts->gen.memmap = tmp_map; context->opts->gen.memmap_chunks = tmp_chunks; } void z80_io_write8(z80_context *context) { uint32_t tmp_mask = context->opts->gen.address_mask; memmap_chunk const *tmp_map = context->opts->gen.memmap; uint32_t tmp_chunks = context->opts->gen.memmap_chunks; context->opts->gen.address_mask = context->io_mask; context->opts->gen.memmap = context->io_map; context->opts->gen.memmap_chunks = context->io_chunks; write_byte(context->scratch2, context->scratch1, NULL, &context->opts->gen, context); context->opts->gen.address_mask = tmp_mask; context->opts->gen.memmap = tmp_map; context->opts->gen.memmap_chunks = tmp_chunks; } //quick hack until I get a chance to change which init method these get passed to static memmap_chunk const * tmp_io_chunks; static uint32_t tmp_num_io_chunks, tmp_io_mask; void init_z80_opts(z80_options * options, memmap_chunk const * chunks, uint32_t num_chunks, memmap_chunk const * io_chunks, uint32_t num_io_chunks, uint32_t clock_divider, uint32_t io_address_mask) { memset(options, 0, sizeof(*options)); options->gen.memmap = chunks; options->gen.memmap_chunks = num_chunks; options->gen.address_mask = 0xFFFF; options->gen.max_address = 0xFFFF; options->gen.clock_divider = clock_divider; tmp_io_chunks = io_chunks; tmp_num_io_chunks = num_io_chunks; tmp_io_mask = io_address_mask; } z80_context * init_z80_context(z80_options *options) { z80_context *context = calloc(1, sizeof(z80_context)); context->opts = options; context->io_map = (memmap_chunk *)tmp_io_chunks; context->io_chunks = tmp_num_io_chunks; context->io_mask = tmp_io_mask; return context; }