mirror of
https://github.com/pevans/erc-c.git
synced 2024-08-19 17:29:34 +00:00
140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
#ifndef _APPLE2_H_
|
|
#define _APPLE2_H_
|
|
|
|
#include "apple2.dd.h"
|
|
#include "mos6502.h"
|
|
#include "vm_bitfont.h"
|
|
#include "vm_screen.h"
|
|
|
|
/*
|
|
* This is the size of the bitmap font we use for the apple2
|
|
*/
|
|
#define APPLE2_SYSFONT_SIZE 21558
|
|
|
|
enum video_modes {
|
|
VIDEO_40COL_TEXT,
|
|
VIDEO_LORES,
|
|
VIDEO_HIRES,
|
|
VIDEO_80COL_TEXT,
|
|
VIDEO_DOUBLE_LORES,
|
|
VIDEO_DOUBLE_HIRES,
|
|
};
|
|
|
|
enum color_modes {
|
|
COLOR_GREEN,
|
|
COLOR_AMBER,
|
|
COLOR_GRAY,
|
|
COLOR_FULL,
|
|
};
|
|
|
|
enum lores_colors {
|
|
LORES_BLACK,
|
|
LORES_MAGENTA,
|
|
LORES_DARKBLUE,
|
|
LORES_PURPLE,
|
|
LORES_DARKGREEN,
|
|
LORES_GRAY1,
|
|
LORES_MEDBLUE,
|
|
LORES_LIGHTBLUE,
|
|
LORES_BROWN,
|
|
LORES_ORANGE,
|
|
LORES_GRAY2,
|
|
LORES_PINK,
|
|
LORES_LIGHTGREEN,
|
|
LORES_YELLOW,
|
|
LORES_AQUAMARINE,
|
|
LORES_WHITE,
|
|
};
|
|
|
|
/*
|
|
* These are the potential memory modes we understand. You can only have
|
|
* one memory mode at a time.
|
|
*/
|
|
enum memory_mode {
|
|
MEMORY_BANK_ROM, // the last 12k is system ROM
|
|
MEMORY_BANK_RAM1, // the last 12k is system RAM
|
|
MEMORY_BANK_RAM2, // the first 4k of the last 12k is a separate RAM
|
|
// block from that in RAM1
|
|
};
|
|
|
|
typedef struct {
|
|
/*
|
|
* The apple 2 hardware used an MOS-6502 processor.
|
|
*/
|
|
mos6502 *cpu;
|
|
|
|
/*
|
|
* This is the literal memory that the CPU above will create. You
|
|
* should _not_ attempt to free this memory; allow the CPU's own
|
|
* delete function to do that.
|
|
*/
|
|
vm_segment *memory;
|
|
|
|
/*
|
|
* The Apple II used a system of bank-switched memory to enable
|
|
* software to address a separate block of ROM.
|
|
*/
|
|
vm_segment *rom;
|
|
|
|
/*
|
|
* Additionally, the Apple II had a standalone block of RAM (with no
|
|
* good name for it, really, hence the regrettably vague "ram2") so
|
|
* that you technically could use 16k of RAM from a set of 12k
|
|
* addresses. The extra 4k lives a lonely life in the garage
|
|
* apartment.
|
|
*/
|
|
vm_segment *ram2;
|
|
|
|
/*
|
|
* The screen wherein we shall render all of our graphics.
|
|
*/
|
|
vm_screen *screen;
|
|
|
|
/*
|
|
* This is the system font (the only font the Apple II knows about,
|
|
* really); anywhere we render text, we have to use this font.
|
|
*/
|
|
vm_bitfont *sysfont;
|
|
|
|
/*
|
|
* This is the mode in which we must interpret graphics. This will
|
|
* tell us not only if we're in lo- or hi-res, but also if we are in
|
|
* single or double view mode.
|
|
*/
|
|
int video_mode;
|
|
|
|
/*
|
|
* This is the color mode we want to emulate. You can have a few
|
|
* different styles of monochromatic displays: green, amber, and
|
|
* light gray on black; you can also emulate a full color display,
|
|
* in which text mode tends to look like light gray.
|
|
*/
|
|
int color_mode;
|
|
|
|
/*
|
|
* This describes the behavior of our bank-switching scheme. We need
|
|
* our read/write mappers to know where writes into the
|
|
* bank-switched area of memory should target.
|
|
*/
|
|
int memory_mode;
|
|
|
|
/*
|
|
* Our two disk drives.
|
|
*/
|
|
apple2dd *drive1;
|
|
apple2dd *drive2;
|
|
} apple2;
|
|
|
|
extern apple2 *apple2_create(int, int);
|
|
extern bool apple2_is_double_video(apple2 *);
|
|
extern int apple2_boot(apple2 *);
|
|
extern void apple2_clear_strobe(apple2 *);
|
|
extern void apple2_free(apple2 *);
|
|
extern void apple2_press_key(apple2 *, vm_8bit);
|
|
extern void apple2_release_key(apple2 *);
|
|
extern void apple2_run_loop(apple2 *);
|
|
extern void apple2_set_color(apple2 *, int);
|
|
extern void apple2_set_video(apple2 *, int);
|
|
|
|
#endif
|