/* next write to attrc selects the index rather than data */
video_state->attrc_index_flipflop = 0;
+ memset(dest, 0x0, length);
- return notimpl_port_read(priv_data, __FUNCTION__, port, dest, length);
+ handle_port_read(priv_data, __FUNCTION__, port, dest, length, 1);
+ return length;
}
static int feat_ctrl_read(struct guest_info * core, uint16_t port, void * dest, uint_t length, void * priv_data) {
static int cga_save(struct v3_chkpt_ctx * ctx, void * private_data) {
struct video_internal * cga = (struct video_internal *)private_data;
+ v3_chkpt_save(ctx, "FRAMEBUFFER", FRAMEBUF_SIZE, cga->framebuf);
+
V3_CHKPT_STD_SAVE(ctx, cga->misc_outp_reg);
V3_CHKPT_STD_SAVE(ctx, cga->seq_index_reg);
V3_CHKPT_STD_SAVE(ctx, cga->seq_data_regs[SEQ_REG_COUNT]);
V3_CHKPT_STD_SAVE(ctx, cga->passthrough);
+ v3_chkpt_save_16(ctx, "SCREEN_OFFSET", &(cga->screen_offset));
+ v3_chkpt_save_16(ctx, "CURSOR_OFFSET", &(cga->cursor_offset));
+
return 0;
}
static int cga_load(struct v3_chkpt_ctx * ctx, void * private_data) {
struct video_internal * cga = (struct video_internal *)private_data;
+ v3_chkpt_load(ctx, "FRAMEBUFFER", FRAMEBUF_SIZE, cga->framebuf);
+
+
V3_CHKPT_STD_LOAD(ctx, cga->misc_outp_reg);
V3_CHKPT_STD_LOAD(ctx, cga->seq_index_reg);
V3_CHKPT_STD_LOAD(ctx, cga->seq_data_regs[SEQ_REG_COUNT]);
V3_CHKPT_STD_LOAD(ctx, cga->passthrough);
+ v3_chkpt_load_16(ctx, "SCREEN_OFFSET", &(cga->screen_offset));
+ v3_chkpt_load_16(ctx, "CURSOR_OFFSET", &(cga->cursor_offset));
+
+
return 0;
}
PrintDebug("video: init_device\n");
video_state = (struct video_internal *)V3_Malloc(sizeof(struct video_internal));
+
+ if (!video_state) {
+ PrintError("Cannot allocate space for CGA state\n");
+ return -1;
+ }
+
memset(video_state, 0, sizeof(struct video_internal));
struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, video_state);
video_state->dev = dev;
video_state->framebuf_pa = (addr_t)V3_AllocPages(FRAMEBUF_SIZE / 4096);
+
+ if (!video_state->framebuf_pa) {
+ PrintError("Cannot allocate frame buffer\n");
+ V3_Free(video_state);
+ return -1;
+ }
+
video_state->framebuf = V3_VAddr((void *)(video_state->framebuf_pa));
+
memset(video_state->framebuf, 0, FRAMEBUF_SIZE);
PrintDebug("PA of array: %p\n", (void *)(video_state->framebuf_pa));