WebSVN – HelenOS – Diff – /branches/dynload/kernel/genarch/src/drivers/ega/ega.c


/*
 * Copyright (c) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup genarch_drivers
 * @{
 */
/**
 * @file
 * @brief EGA driver.
 */
 
#include <genarch/drivers/ega/ega.h>
#include <putchar.h>
#include <mm/page.h>
#include <mm/as.h>
#include <mm/slab.h>
#include <arch/mm/page.h>
#include <synch/spinlock.h>
#include <arch/types.h>
#include <arch/asm.h>
#include <memstr.h>
#include <console/chardev.h>
#include <console/console.h>
#include <sysinfo/sysinfo.h>
#include <ddi/ddi.h>
 
/*
 * The EGA driver.
 * Simple and short. Function for displaying characters and "scrolling".
 */
 
SPINLOCK_INITIALIZE(egalock);
static uint32_t ega_cursor;
static uint8_t *videoram;
static uint8_t *backbuf;
static ioport8_t *ega_base;
 
#define SPACE  0x20
#define STYLE  0x07
 
#define EMPTY_CHAR  (STYLE << 8 | SPACE)
 
/*
 * This function takes care of scrolling.
 */
static void ega_check_cursor(void)
{
    if (ega_cursor < EGA_SCREEN)
        return;
   
    memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2),
        (EGA_SCREEN - EGA_COLS) * 2);
    memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2),
        (EGA_SCREEN - EGA_COLS) * 2);
    memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
    memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
    ega_cursor = ega_cursor - EGA_COLS;
}
 
static void ega_show_cursor(void)
{
    pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);
    uint8_t stat = pio_read_8(ega_base + EGA_DATA_REG);
    pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);
    pio_write_8(ega_base + EGA_DATA_REG, stat & (~(1 << 5)));
}
 
static void ega_move_cursor(void)
{
    pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);
    pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));
    pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
    pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));
}
 
static void ega_sync_cursor(void)
{
    pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);
    uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG);
    pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
    uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG);
   
    ega_cursor = (hi << 8) | lo;
   
    if (ega_cursor >= EGA_SCREEN)
        ega_cursor = 0;
   
    if ((ega_cursor % EGA_COLS) != 0)
        ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
   
    memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
    memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
   
    ega_check_cursor();
    ega_move_cursor();
    ega_show_cursor();
}
 
static void ega_display_char(char ch, bool silent)
{
    backbuf[ega_cursor * 2] = ch;
    backbuf[ega_cursor * 2 + 1] = STYLE;
   
    if (!silent) {
        videoram[ega_cursor * 2] = ch;
        videoram[ega_cursor * 2 + 1] = STYLE;
    }
}
 
static void ega_putchar(outdev_t *dev __attribute__((unused)), const char ch, bool silent)
{
    ipl_t ipl;
   
    ipl = interrupts_disable();
    spinlock_lock(&egalock);
   
    switch (ch) {
    case '\n':
        ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
        break;
    case '\t':
        ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
        break;
    case '\b':
        if (ega_cursor % EGA_COLS)
            ega_cursor--;
        break;
    default:
        ega_display_char(ch, silent);
        ega_cursor++;
        break;
    }
    ega_check_cursor();
   
    if (!silent)
        ega_move_cursor();
   
    spinlock_unlock(&egalock);
    interrupts_restore(ipl);
}
 
static outdev_t ega_console;
static outdev_operations_t ega_ops = {
    .write = ega_putchar
};
 
void ega_init(ioport8_t *base, uintptr_t videoram_phys)
{
    /* Initialize the software structure. */
    ega_base = base;
   
    backbuf = (uint8_t *) malloc(EGA_VRAM_SIZE, 0);
    if (!backbuf)
        panic("Unable to allocate backbuffer.");
   
    videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE);
   
    /* Synchronize the back buffer and cursor position. */
    memcpy(backbuf, videoram, EGA_VRAM_SIZE);
    ega_sync_cursor();
   
    outdev_initialize("ega", &ega_console, &ega_ops);
    stdout = &ega_console;
   
    sysinfo_set_item_val("fb", NULL, true);
    sysinfo_set_item_val("fb.kind", NULL, 2);
    sysinfo_set_item_val("fb.width", NULL, EGA_COLS);
    sysinfo_set_item_val("fb.height", NULL, EGA_ROWS);
    sysinfo_set_item_val("fb.blinking", NULL, true);
    sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys);
}
 
void ega_redraw(void)
{
    memcpy(videoram, backbuf, EGA_VRAM_SIZE);
    ega_move_cursor();
    ega_show_cursor();
}
 
/** @}
 */
 

Rev 4345	Rev 4346
1	/*	1	/*
2	* Copyright (c) 2001-2004 Jakub Jermar	2	* Copyright (c) 2001-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup genarch_drivers	29	/** @addtogroup genarch_drivers
30	* @{	30	* @{
31	*/	31	*/
32	/**	32	/**
33	* @file	33	* @file
34	* @brief EGA driver.	34	* @brief EGA driver.
35	*/	35	*/
36		36
37	#include <genarch/drivers/ega/ega.h>	37	#include <genarch/drivers/ega/ega.h>
38	#include <putchar.h>	38	#include <putchar.h>
39	#include <mm/page.h>	39	#include <mm/page.h>
40	#include <mm/as.h>	40	#include <mm/as.h>
41	#include <mm/slab.h>	41	#include <mm/slab.h>
42	#include <arch/mm/page.h>	42	#include <arch/mm/page.h>
43	#include <synch/spinlock.h>	43	#include <synch/spinlock.h>
44	#include <arch/types.h>	44	#include <arch/types.h>
45	#include <arch/asm.h>	45	#include <arch/asm.h>
46	#include <memstr.h>	46	#include <memstr.h>
47	#include <console/chardev.h>	47	#include <console/chardev.h>
48	#include <console/console.h>	48	#include <console/console.h>
49	#include <sysinfo/sysinfo.h>	49	#include <sysinfo/sysinfo.h>
50	#include <ddi/ddi.h>	50	#include <ddi/ddi.h>
51		51
52	/*	52	/*
53	* The EGA driver.	53	* The EGA driver.
54	* Simple and short. Function for displaying characters and "scrolling".	54	* Simple and short. Function for displaying characters and "scrolling".
55	*/	55	*/
56		56
57	SPINLOCK_INITIALIZE(egalock);	57	SPINLOCK_INITIALIZE(egalock);
58	static uint32_t ega_cursor;	58	static uint32_t ega_cursor;
59	static uint8_t *videoram;	59	static uint8_t *videoram;
60	static uint8_t *backbuf;	60	static uint8_t *backbuf;
61	static ioport8_t *ega_base;	61	static ioport8_t *ega_base;
62		62
-		63	#define SPACE 0x20
63	#define EMPTY_CHAR 0x0720	64	#define STYLE 0x07
64		65
65	chardev_t ega_console;	66	#define EMPTY_CHAR (STYLE << 8 \| SPACE)
66		67
67	/*	68	/*
68	* This function takes care of scrolling.	69	* This function takes care of scrolling.
69	*/	70	*/
70	static void ega_check_cursor(void)	71	static void ega_check_cursor(void)
71	{	72	{
72	if (ega_cursor < EGA_SCREEN)	73	if (ega_cursor < EGA_SCREEN)
73	return;	74	return;
74		75
75	memmove((void ) videoram, (void ) (videoram + EGA_COLS * 2),	76	memmove((void ) videoram, (void ) (videoram + EGA_COLS * 2),
76	(EGA_SCREEN - EGA_COLS) * 2);	77	(EGA_SCREEN - EGA_COLS) * 2);
77	memmove((void ) backbuf, (void ) (backbuf + EGA_COLS * 2),	78	memmove((void ) backbuf, (void ) (backbuf + EGA_COLS * 2),
78	(EGA_SCREEN - EGA_COLS) * 2);	79	(EGA_SCREEN - EGA_COLS) * 2);
79	memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);	80	memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
80	memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);	81	memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
81	ega_cursor = ega_cursor - EGA_COLS;	82	ega_cursor = ega_cursor - EGA_COLS;
82	}	83	}
83		84
84	static void ega_show_cursor(void)	85	static void ega_show_cursor(void)
85	{	86	{
86	pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);	87	pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);
87	uint8_t stat = pio_read_8(ega_base + EGA_DATA_REG);	88	uint8_t stat = pio_read_8(ega_base + EGA_DATA_REG);
88	pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);	89	pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);
89	pio_write_8(ega_base + EGA_DATA_REG, stat & (~(1 << 5)));	90	pio_write_8(ega_base + EGA_DATA_REG, stat & (~(1 << 5)));
90	}	91	}
91		92
92	static void ega_move_cursor(void)	93	static void ega_move_cursor(void)
93	{	94	{
94	pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);	95	pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);
95	pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));	96	pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));
96	pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);	97	pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
97	pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));	98	pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));
98	}	99	}
99		100
100	static void ega_sync_cursor(void)	101	static void ega_sync_cursor(void)
101	{	102	{
102	pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);	103	pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);
103	uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG);	104	uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG);
104	pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);	105	pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
105	uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG);	106	uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG);
106		107
107	ega_cursor = (hi << 8) \| lo;	108	ega_cursor = (hi << 8) \| lo;
108		109
109	if (ega_cursor >= EGA_SCREEN)	110	if (ega_cursor >= EGA_SCREEN)
110	ega_cursor = 0;	111	ega_cursor = 0;
111		112
112	if ((ega_cursor % EGA_COLS) != 0)	113	if ((ega_cursor % EGA_COLS) != 0)
113	ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;	114	ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
114		115
115	memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);	116	memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
116	memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);	117	memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
117		118
118	ega_check_cursor();	119	ega_check_cursor();
119	ega_move_cursor();	120	ega_move_cursor();
120	ega_show_cursor();	121	ega_show_cursor();
121	}	122	}
122		123
123	static void ega_display_char(char ch, bool silent)	124	static void ega_display_char(char ch, bool silent)
124	{	125	{
125	backbuf[ega_cursor * 2] = ch;	126	backbuf[ega_cursor * 2] = ch;
-		127	backbuf[ega_cursor * 2 + 1] = STYLE;
126		128
127	if (!silent)	129	if (!silent) {
128	videoram[ega_cursor * 2] = ch;	130	videoram[ega_cursor * 2] = ch;
-		131	videoram[ega_cursor * 2 + 1] = STYLE;
-		132	}
129	}	133	}
130		134
131	static void ega_putchar(chardev_t *dev __attribute__((unused)), const char ch, bool silent)	135	static void ega_putchar(outdev_t *dev __attribute__((unused)), const char ch, bool silent)
132	{	136	{
133	ipl_t ipl;	137	ipl_t ipl;
134		138
135	ipl = interrupts_disable();	139	ipl = interrupts_disable();
136	spinlock_lock(&egalock);	140	spinlock_lock(&egalock);
137		141
138	switch (ch) {	142	switch (ch) {
139	case '\n':	143	case '\n':
140	ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;	144	ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
141	break;	145	break;
142	case '\t':	146	case '\t':
143	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;	147	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
144	break;	148	break;
145	case '\b':	149	case '\b':
146	if (ega_cursor % EGA_COLS)	150	if (ega_cursor % EGA_COLS)
147	ega_cursor--;	151	ega_cursor--;
148	break;	152	break;
149	default:	153	default:
150	ega_display_char(ch, silent);	154	ega_display_char(ch, silent);
151	ega_cursor++;	155	ega_cursor++;
152	break;	156	break;
153	}	157	}
154	ega_check_cursor();	158	ega_check_cursor();
155		159
156	if (!silent)	160	if (!silent)
157	ega_move_cursor();	161	ega_move_cursor();
158		162
159	spinlock_unlock(&egalock);	163	spinlock_unlock(&egalock);
160	interrupts_restore(ipl);	164	interrupts_restore(ipl);
161	}	165	}
162		166
-		167	static outdev_t ega_console;
163	static chardev_operations_t ega_ops = {	168	static outdev_operations_t ega_ops = {
164	.write = ega_putchar	169	.write = ega_putchar
165	};	170	};
166		171
167	void ega_init(ioport8_t *base, uintptr_t videoram_phys)	172	void ega_init(ioport8_t *base, uintptr_t videoram_phys)
168	{	173	{
169	/* Initialize the software structure. */	174	/* Initialize the software structure. */
170	ega_base = base;	175	ega_base = base;
171		176
172	backbuf = (uint8_t *) malloc(EGA_VRAM_SIZE, 0);	177	backbuf = (uint8_t *) malloc(EGA_VRAM_SIZE, 0);
173	if (!backbuf)	178	if (!backbuf)
174	panic("Unable to allocate backbuffer.");	179	panic("Unable to allocate backbuffer.");
175		180
176	videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE);	181	videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE);
177		182
178	/* Synchronize the back buffer and cursor position. */	183	/* Synchronize the back buffer and cursor position. */
179	memcpy(backbuf, videoram, EGA_VRAM_SIZE);	184	memcpy(backbuf, videoram, EGA_VRAM_SIZE);
180	ega_sync_cursor();	185	ega_sync_cursor();
181		186
182	chardev_initialize("ega_out", &ega_console, &ega_ops);	187	outdev_initialize("ega", &ega_console, &ega_ops);
183	stdout = &ega_console;	188	stdout = &ega_console;
184		189
185	sysinfo_set_item_val("fb", NULL, true);	190	sysinfo_set_item_val("fb", NULL, true);
186	sysinfo_set_item_val("fb.kind", NULL, 2);	191	sysinfo_set_item_val("fb.kind", NULL, 2);
187	sysinfo_set_item_val("fb.width", NULL, EGA_COLS);	192	sysinfo_set_item_val("fb.width", NULL, EGA_COLS);
188	sysinfo_set_item_val("fb.height", NULL, EGA_ROWS);	193	sysinfo_set_item_val("fb.height", NULL, EGA_ROWS);
189	sysinfo_set_item_val("fb.blinking", NULL, true);	194	sysinfo_set_item_val("fb.blinking", NULL, true);
190	sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys);	195	sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys);
191	}	196	}
192		197
193	void ega_redraw(void)	198	void ega_redraw(void)
194	{	199	{
195	memcpy(videoram, backbuf, EGA_VRAM_SIZE);	200	memcpy(videoram, backbuf, EGA_VRAM_SIZE);
196	ega_move_cursor();	201	ega_move_cursor();
197	ega_show_cursor();	202	ega_show_cursor();
198	}	203	}
199		204
200	/** @}	205	/** @}
201	*/	206	*/
202		207

Subversion Repositories HelenOS

(root)/branches/dynload/kernel/genarch/src/drivers/ega/ega.c – Rev 4345 → 4346