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Implemented software-requested DMA block transfers, fixes #405, and also fixes UMBPCI's DMACHK ISA DMA tests;

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Reworked a few things and re-implemented memory write protection in the SCAT emulation, to require less unusual mappings;
Removed two files that should not be there;
Made sure all graphics cards' memory mappings are mapped as MEM_MAPPING_EXTERNAL;
Added MEM_MAPPING_ROMCS flag to signal that a mapping responds to MEMCS* and made the BIOS and Intel flash mappings use it.
This commit is contained in:
OBattler
2019-09-28 17:32:05 +02:00
parent b1f91ff54a
commit 6627282efb
13 changed files with 147 additions and 1943 deletions
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2
src/mem.h
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@@ -42,6 +42,7 @@
#define MEM_MAPPING_INTERNAL 2 /* on internal bus (RAM) */
#define MEM_MAPPING_ROM 4 /* Executing from ROM may involve
* additional wait states. */
#define MEM_MAPPING_ROMCS 8 /* respond to ROMCS* */
#define MEM_MAP_TO_SHADOW_RAM_MASK 1
#define MEM_MAP_TO_RAM_ADDR_MASK 2
@@ -271,6 +272,7 @@ extern void mem_mapping_set_addr(mem_mapping_t *,
extern void mem_mapping_set_exec(mem_mapping_t *, uint8_t *exec);
extern void mem_mapping_disable(mem_mapping_t *);
extern void mem_mapping_enable(mem_mapping_t *);
extern int mem_mapping_is_romcs(uint32_t addr, int write);
extern void mem_set_mem_state(uint32_t base, uint32_t size, int state);