Mon, 06 Dec 2010 01:43:04 +0000
fix side-select bug in WDC FDC driver, was causing all reads to occur on side0... now the Loader boots!
Loader will boot, but immediately gives up on the floppy drive... Not sure why.
| philpem@18 | 1 | #ifndef _STATE_H |
| philpem@18 | 2 | #define _STATE_H |
| philpem@18 | 3 | |
| philpem@18 | 4 | #include <stddef.h> |
| philpem@18 | 5 | #include <stdint.h> |
| philpem@18 | 6 | #include <stdbool.h> |
| philpem@52 | 7 | #include "wd279x.h" |
| philpem@18 | 8 | |
| philpem@18 | 9 | // Maximum size of the Boot PROMs. Must be a binary power of two. |
| philpem@18 | 10 | #define ROM_SIZE 32768 |
| philpem@18 | 11 | |
| philpem@18 | 12 | /** |
| philpem@18 | 13 | * @brief Emulator state storage |
| philpem@18 | 14 | * |
| philpem@18 | 15 | * This structure stores the internal state of the emulator. |
| philpem@18 | 16 | */ |
| philpem@18 | 17 | typedef struct { |
| philpem@18 | 18 | // Boot PROM can be up to 32Kbytes total size |
| philpem@18 | 19 | uint8_t rom[ROM_SIZE]; ///< Boot PROM data buffer |
| philpem@18 | 20 | |
| philpem@52 | 21 | //// Main system RAM |
| philpem@18 | 22 | uint8_t *ram; ///< RAM data buffer |
| philpem@18 | 23 | size_t ram_size; ///< Size of RAM buffer in bytes |
| philpem@18 | 24 | |
| philpem@52 | 25 | /// Video RAM |
| philpem@52 | 26 | uint8_t vram[0x8000]; |
| philpem@24 | 27 | |
| philpem@52 | 28 | /// Map RAM |
| philpem@52 | 29 | uint8_t map[0x800]; |
| philpem@26 | 30 | |
| philpem@52 | 31 | //// Registers |
| philpem@37 | 32 | uint16_t genstat; ///< General Status Register |
| philpem@37 | 33 | uint16_t bsr0; ///< Bus Status Register 0 |
| philpem@37 | 34 | uint16_t bsr1; ///< Bus Status Register 1 |
| philpem@32 | 35 | |
| philpem@52 | 36 | //// MISCELLANEOUS CONTROL REGISTER |
| philpem@52 | 37 | bool dma_reading; ///< True if Disc DMA reads from the controller, false otherwise |
| philpem@46 | 38 | uint8_t leds; ///< LED status, 1=on, in order red3/green2/yellow1/red0 from bit3 to bit0 |
| philpem@46 | 39 | |
| philpem@52 | 40 | //// GENERAL CONTROL REGISTER |
| philpem@18 | 41 | /// GENCON.ROMLMAP -- false ORs the address with 0x800000, forcing the |
| philpem@18 | 42 | /// 68010 to access ROM instead of RAM when booting. TRM page 2-36. |
| philpem@24 | 43 | bool romlmap; |
| philpem@44 | 44 | /// GENCON.PIE -- Parity Error Check Enable |
| philpem@44 | 45 | bool pie; |
| philpem@52 | 46 | |
| philpem@52 | 47 | /// DMA Address Register |
| philpem@52 | 48 | uint32_t dma_address; |
| philpem@52 | 49 | |
| philpem@53 | 50 | /// DMA count |
| philpem@53 | 51 | uint32_t dma_count; |
| philpem@53 | 52 | |
| philpem@53 | 53 | /// DMA direction |
| philpem@53 | 54 | bool idmarw; |
| philpem@53 | 55 | /// DMA enable |
| philpem@53 | 56 | bool dmaen; |
| philpem@53 | 57 | bool dmaenb; |
| philpem@53 | 58 | |
| philpem@52 | 59 | /// Floppy disc controller context |
| philpem@52 | 60 | WD2797_CTX fdc_ctx; |
| philpem@18 | 61 | } S_state; |
| philpem@18 | 62 | |
| philpem@18 | 63 | // Global emulator state. Yes, I know global variables are evil, please don't |
| philpem@18 | 64 | // email me and lecture me about it. -philpem |
| philpem@18 | 65 | #ifndef _STATE_C |
| philpem@18 | 66 | extern S_state state; |
| philpem@18 | 67 | #else |
| philpem@18 | 68 | S_state state; |
| philpem@18 | 69 | #endif |
| philpem@18 | 70 | |
| philpem@18 | 71 | /** |
| philpem@18 | 72 | * @brief Initialise system state |
| philpem@18 | 73 | * |
| philpem@18 | 74 | * @param ramsize RAM size in bytes -- must be a multiple of 512KiB, min 512KiB, max 4MiB. |
| philpem@18 | 75 | * |
| philpem@18 | 76 | * Initialises the emulator's internal state. |
| philpem@18 | 77 | */ |
| philpem@18 | 78 | int state_init(size_t ramsize); |
| philpem@18 | 79 | |
| philpem@18 | 80 | /** |
| philpem@18 | 81 | * @brief Deinitialise system state |
| philpem@18 | 82 | * |
| philpem@18 | 83 | * Deinitialises the saved state, and frees all memory. Call this function |
| philpem@18 | 84 | * before exiting your program to avoid memory leaks. |
| philpem@18 | 85 | */ |
| philpem@18 | 86 | void state_done(); |
| philpem@18 | 87 | |
| philpem@18 | 88 | #endif |