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https://github.com/cc65/cc65.git
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91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
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/*
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* TEST VERSION - CURRENTLY C64 SPECIFIC!!!
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*/
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#include <string.h>
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#include <cbm.h>
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#include <modload.h>
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#include <tgi.h>
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#include <tgi/tgi-kernel.h>
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static unsigned char ReadInputBlock (struct mod_ctrl* C, void* Buf, unsigned Size)
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{
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return (cbm_read (1, Buf, Size) != Size);
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}
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void __fastcall__ tgi_load (unsigned char mode)
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/* Install the matching driver for the given mode. Will just load the driver
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* and check if loading was successul. Will not switch to gaphics mode.
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*/
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{
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const char* name = tgi_map_mode (mode);
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if (name == 0) {
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/* No driver for this mode */
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tgi_error = TGI_ERR_NO_DRIVER;
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} else {
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/* Laod the driver */
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tgi_load_driver (name);
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}
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}
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void __fastcall__ tgi_load_driver (const char* name)
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/* Install the given driver. This function is identical to tgi_load with the
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* only difference that the name of the driver is specified explicitly. You
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* should NOT use this function in most cases, use tgi_load() instead.
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*/
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{
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static const unsigned char marker[4] = { 0x74, 0x67, 0x69, 0x00 };
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static struct mod_ctrl ctrl = {
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ReadInputBlock /* read_block */
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};
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unsigned Res;
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/* Check if we do already have a driver loaded. If so, remove it. */
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if (tgi_drv != 0) {
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tgi_unload ();
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}
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/* Now open the file */
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if (cbm_open (1, 8, 2, name) != 0) {
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tgi_error = TGI_ERR_CANNOT_LOAD;
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return;
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}
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/* Load the module */
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Res = mod_load (&ctrl);
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cbm_close (1);
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/* Check the return code */
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if (Res == MLOAD_OK) {
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/* Get a pointer to the loaded driver */
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tgi_drv = (tgi_drv_header*) ctrl.module;
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/* Check the header */
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if (memcmp (tgi_drv, marker, sizeof (marker)) != 0) {
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/* Invalid driver */
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mod_free (tgi_drv);
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tgi_drv = 0;
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tgi_error = TGI_ERR_INV_DRIVER;
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} else {
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/* Driver is ok do setup */
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tgi_setup ();
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}
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} else {
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/* Error loading the driver */
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tgi_error = TGI_ERR_CANNOT_LOAD;
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}
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}
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