src/keyboard.h

Sat, 17 Nov 2012 19:18:29 +0000

author
Philip Pemberton <philpem@philpem.me.uk>
date
Sat, 17 Nov 2012 19:18:29 +0000
changeset 112
a392eb8f9806
parent 91
781c15e60012
permissions
-rw-r--r--

add HDD support + fixes

Patch-Author: Andrew Warkentin <andreww591!gmail>
Patch-Message-ID: <50A772FC.8020009@gmail.com>

I have added floppy write support, full hard disk emulation, and proper handling of DMA page faults to FreeBee. I also fixed the floppy step commands, changed the "force interrupt" floppy command to generate a type 1 status, and changed the DMA address counter to reset to 3fff when a transfer completes (which is what Unix seems to expect - without it, the kernel says that the floppy isn't ready). The floppy, hard disk, and DMA page fault tests all pass. Initializing hard disks and floppies also works (the geometry for both is still fixed by the size of the image, though, and format commands only appear to succeed, but they don't modify the image). Unix still doesn't run, though (it hangs after reading some sectors from the floppy).

philpem@86 1 #ifndef _KEYBOARD_H
philpem@86 2 #define _KEYBOARD_H
philpem@86 3
philpem@80 4 #include "SDL.h"
philpem@86 5
philpem@80 6 /// Keyboard buffer size in bytes
philpem@80 7 #define KEYBOARD_BUFFER_SIZE 256
philpem@80 8
philpem@86 9 typedef struct {
philpem@80 10 /// Key states
philpem@80 11 int keystate[0x80];
philpem@80 12
philpem@80 13 /// Keyboard buffer
philpem@90 14 uint8_t buffer[KEYBOARD_BUFFER_SIZE];
philpem@80 15
philpem@80 16 /// Read pointer
philpem@80 17 size_t readp;
philpem@80 18
philpem@80 19 /// Write pointer
philpem@80 20 size_t writep;
philpem@80 21
philpem@80 22 /// Number of bytes in keyboard buffer
philpem@80 23 size_t buflen;
philpem@80 24
philpem@80 25 /// Transmit Interrupt Enable
philpem@80 26 bool txie;
philpem@90 27
philpem@80 28 /// Receive Interrupt Enable
philpem@80 29 bool rxie;
philpem@91 30
philpem@91 31 /// "Keyboard State Changed" flag
philpem@91 32 bool update_flag;
philpem@86 33 } KEYBOARD_STATE;
philpem@86 34
philpem@86 35 /**
philpem@80 36 * Initialise a keyboard state block.
philpem@86 37 *
philpem@80 38 * Call this once when the keyboard is added to the emulation.
philpem@86 39 */
philpem@80 40 void keyboard_init(KEYBOARD_STATE *ks);
philpem@86 41
philpem@86 42 /**
philpem@80 43 * SDL_Event delegation routine.
philpem@86 44 *
philpem@80 45 * Call this when an SDL keyup or keydown event is received.
philpem@86 46 */
philpem@80 47 void keyboard_event(KEYBOARD_STATE *ks, SDL_Event *ev);
philpem@80 48
philpem@80 49 /**
philpem@80 50 * Keyboard scan routine.
philpem@80 51 *
philpem@80 52 * Call this periodically to scan the keyboard. 60 times/sec should be fine.
philpem@80 53 */
philpem@80 54 void keyboard_scan(KEYBOARD_STATE *ks);
philpem@80 55
philpem@80 56 bool keyboard_get_irq(KEYBOARD_STATE *ks);
philpem@80 57 uint8_t keyboard_read(KEYBOARD_STATE *ks, uint8_t addr);
philpem@80 58 void keyboard_write(KEYBOARD_STATE *ks, uint8_t addr, uint8_t val);
philpem@86 59
philpem@86 60 #endif