407 lines
13 KiB
C
407 lines
13 KiB
C
/* Varvara plugin for rockbox. I have no idea what I'm doing.
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copyright (c) 2021 Devine Lu Linvega
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copyright (c) 2021 nihilazo
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE.
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TODO de-janking display code, support for greyscale displays
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TODO rom loading
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TODO other varvara devices
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TODO hardware builds
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TODO clean up
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*/
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#include "uxn.h"
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#include "devices/ppu.h"
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#include "plugin.h"
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#include <stdio.h>
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#include <stdint.h>
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#include <time.h>
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const Uint8 hwrom[] = { /* hello world ROM */
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0x20, 0x01, 0x0e, 0x94, 0x80, 0x18, 0x17, 0x21,
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0x94, 0x80, 0xf7, 0x0d, 0x22, 0x00, 0x48, 0x65,
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0x6c, 0x6c, 0x6f, 0x20, 0x55, 0x78, 0x6e, 0x21,
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0x21,
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};
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const Uint8 screenrom[] = { /* screen test ROM */
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0x20, 0x01, 0x43, 0x80, 0x20, 0x37, 0x20, 0xf0,
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0x7f, 0x80, 0x08, 0x37, 0x20, 0xf0, 0xe0, 0x80,
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0x0a, 0x37, 0x20, 0xf0, 0xc0, 0x80, 0x0c, 0x37,
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0x80, 0x22, 0x36, 0x80, 0x01, 0x3f, 0x20, 0x00,
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0x20, 0x39, 0x80, 0x02, 0x31, 0x80, 0x24, 0x36,
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0x80, 0x01, 0x3f, 0x80, 0x04, 0x31, 0x20, 0x01,
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0xd4, 0x2e, 0x20, 0x02, 0x2f, 0x2e, 0x20, 0x02,
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0x71, 0x2e, 0x20, 0x02, 0xae, 0x2e, 0x20, 0x03,
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0x3a, 0x2e, 0x00, 0x80, 0x00, 0x30, 0x21, 0x23,
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0x80, 0x00, 0x31, 0x80, 0x02, 0x30, 0x20, 0x00,
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0x48, 0x38, 0x80, 0x28, 0x37, 0x80, 0x04, 0x30,
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0x20, 0x00, 0x50, 0x39, 0x80, 0x2a, 0x37, 0x80,
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0x01, 0x0f, 0x05, 0x03, 0x80, 0x04, 0x1f, 0x80,
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0x00, 0x05, 0x80, 0x30, 0x3f, 0x20, 0x03, 0x91,
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0x38, 0x80, 0x2c, 0x37, 0xcf, 0x80, 0x2f, 0x17,
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0x80, 0x0f, 0x1c, 0x80, 0x00, 0x05, 0x80, 0x30,
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0x3f, 0x20, 0x03, 0x91, 0x38, 0x80, 0x2c, 0x37,
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0x80, 0x28, 0x36, 0x20, 0x00, 0x08, 0x38, 0x80,
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0x28, 0x37, 0xcf, 0x80, 0x2f, 0x17, 0x03, 0x80,
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0x04, 0x1f, 0x80, 0x00, 0x05, 0x80, 0x30, 0x3f,
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0x20, 0x03, 0x91, 0x38, 0x80, 0x2c, 0x37, 0x80,
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0x28, 0x36, 0x20, 0x00, 0x08, 0x38, 0x80, 0x28,
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0x37, 0xcf, 0x80, 0x2f, 0x17, 0x80, 0x0f, 0x1c,
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0x80, 0x00, 0x05, 0x80, 0x30, 0x3f, 0x20, 0x03,
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0x91, 0x38, 0x80, 0x2c, 0x37, 0x80, 0x28, 0x36,
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0x20, 0x00, 0x08, 0x38, 0x80, 0x28, 0x37, 0x4f,
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0x80, 0x2f, 0x17, 0x00, 0x80, 0x10, 0x80, 0x00,
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0x03, 0x80, 0x30, 0x1f, 0x80, 0x00, 0x05, 0x20,
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0x03, 0x91, 0x38, 0x80, 0x2c, 0x37, 0x03, 0x80,
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0x30, 0x1f, 0x80, 0x00, 0x05, 0x80, 0x02, 0x30,
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0x20, 0x00, 0x40, 0x39, 0x38, 0x80, 0x28, 0x37,
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0x80, 0x04, 0x30, 0x20, 0x00, 0x50, 0x39, 0x80,
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0x2a, 0x37, 0x80, 0x01, 0x80, 0x2f, 0x17, 0x03,
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0x80, 0x30, 0x1f, 0x80, 0x00, 0x05, 0x80, 0x04,
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0x30, 0x20, 0x00, 0x40, 0x39, 0x38, 0x80, 0x2a,
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0x37, 0x80, 0x02, 0x30, 0x20, 0x00, 0x50, 0x39,
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0x80, 0x28, 0x37, 0x80, 0x01, 0x80, 0x2f, 0x17,
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0x01, 0x8a, 0x80, 0xab, 0x0d, 0x22, 0x6c, 0x20,
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0x03, 0x81, 0x80, 0x2c, 0x37, 0x80, 0x00, 0x80,
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0x00, 0x03, 0x80, 0x0f, 0x1c, 0x80, 0x40, 0x1f,
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0x80, 0x01, 0x1f, 0x80, 0x00, 0x05, 0x80, 0x02,
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0x30, 0x20, 0x00, 0x40, 0x39, 0x38, 0x80, 0x28,
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0x37, 0x03, 0x80, 0xf0, 0x1c, 0x80, 0x01, 0x1f,
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0x80, 0x00, 0x05, 0x80, 0x04, 0x30, 0x20, 0x00,
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0x40, 0x39, 0x38, 0x80, 0x2a, 0x37, 0x03, 0x80,
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0x2f, 0x17, 0x01, 0x89, 0x80, 0xca, 0x0d, 0x22,
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0x6c, 0x80, 0x10, 0x80, 0x00, 0x8f, 0x03, 0x80,
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0x02, 0x1f, 0x80, 0x00, 0x05, 0x80, 0x40, 0x3f,
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0x80, 0x04, 0x30, 0x20, 0x00, 0x40, 0x39, 0x38,
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0x2f, 0x03, 0x80, 0x03, 0x1c, 0x80, 0x00, 0x05,
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0x80, 0x40, 0x3f, 0x20, 0x00, 0x40, 0x38, 0x80,
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0x02, 0x30, 0x20, 0x00, 0x08, 0x38, 0x38, 0x6f,
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0x4f, 0x80, 0x00, 0x20, 0x02, 0xe7, 0x2e, 0x01,
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0x8a, 0x80, 0xc9, 0x0d, 0x22, 0x6c, 0x80, 0x10,
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0x80, 0x00, 0x8f, 0x03, 0x80, 0x02, 0x1f, 0x80,
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0x00, 0x05, 0x80, 0x40, 0x3f, 0x80, 0x04, 0x30,
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0x38, 0x2f, 0x03, 0x80, 0x03, 0x1c, 0x80, 0x00,
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0x05, 0x80, 0x40, 0x3f, 0x20, 0x00, 0x40, 0x38,
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0x80, 0x02, 0x30, 0x20, 0x00, 0x08, 0x38, 0x38,
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0x6f, 0x4f, 0x80, 0x80, 0x20, 0x02, 0xe7, 0x2e,
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0x01, 0x8a, 0x80, 0xcd, 0x0d, 0x22, 0x6c, 0x18,
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0x0f, 0x20, 0x03, 0x81, 0x80, 0x2c, 0x37, 0x80,
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0x2a, 0x37, 0x80, 0x28, 0x37, 0x80, 0x00, 0xcf,
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0x18, 0x80, 0x2f, 0x17, 0x80, 0x28, 0x36, 0x20,
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0x00, 0x08, 0x38, 0x80, 0x28, 0x37, 0x80, 0x10,
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0xcf, 0x18, 0x80, 0x2f, 0x17, 0x80, 0x28, 0x36,
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0x20, 0x00, 0x08, 0x39, 0x80, 0x28, 0x37, 0x80,
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0x2a, 0x36, 0x20, 0x00, 0x08, 0x38, 0x80, 0x2a,
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0x37, 0x80, 0x20, 0xcf, 0x18, 0x80, 0x2f, 0x17,
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0x80, 0x28, 0x36, 0x20, 0x00, 0x08, 0x38, 0x80,
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0x28, 0x37, 0x80, 0x30, 0x4f, 0x18, 0x80, 0x2f,
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0x17, 0x6c, 0x80, 0x04, 0x30, 0x20, 0x00, 0x40,
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0x39, 0x80, 0x2a, 0x37, 0x80, 0x02, 0x30, 0x20,
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0x00, 0x48, 0x38, 0x80, 0x28, 0x37, 0x80, 0x00,
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0x80, 0x2e, 0x17, 0x80, 0x02, 0x30, 0x20, 0x00,
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0x49, 0x38, 0x80, 0x28, 0x37, 0x80, 0x01, 0x80,
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0x2e, 0x17, 0x80, 0x02, 0x30, 0x20, 0x00, 0x4a,
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0x38, 0x80, 0x28, 0x37, 0x80, 0x02, 0x80, 0x2e,
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0x17, 0x80, 0x02, 0x30, 0x20, 0x00, 0x4b, 0x38,
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0x80, 0x28, 0x37, 0x80, 0x03, 0x80, 0x2e, 0x17,
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0x6c, 0x0f, 0x38, 0x67, 0x5f, 0xdf, 0xbf, 0xbf,
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0xbf, 0x00, 0x07, 0x18, 0x20, 0x23, 0x44, 0x48,
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0x48, 0x00, 0x7c, 0x82, 0x82, 0x82, 0x82, 0x82,
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0x7c, 0x00, 0x30, 0x10, 0x10, 0x10, 0x10, 0x10,
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0x10, 0x00, 0x7c, 0x82, 0x02, 0x7c, 0x80, 0x80,
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0xfe, 0x00, 0x7c, 0x82, 0x02, 0x1c, 0x02, 0x82,
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0x7c, 0x00, 0x0c, 0x14, 0x24, 0x44, 0x84, 0xfe,
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0x04, 0x00, 0xfe, 0x80, 0x80, 0x7c, 0x02, 0x82,
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0x7c, 0x00, 0x7c, 0x82, 0x80, 0xfc, 0x82, 0x82,
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0x7c, 0x00, 0x7c, 0x82, 0x02, 0x1e, 0x02, 0x02,
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0x02, 0x00, 0x7c, 0x82, 0x82, 0x7c, 0x82, 0x82,
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0x7c, 0x00, 0x7c, 0x82, 0x82, 0x7e, 0x02, 0x82,
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0x7c, 0x00, 0x7c, 0x82, 0x02, 0x7e, 0x82, 0x82,
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0x7e, 0x00, 0xfc, 0x82, 0x82, 0xfc, 0x82, 0x82,
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0xfc, 0x00, 0x7c, 0x82, 0x80, 0x80, 0x80, 0x82,
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0x7c, 0x00, 0xfc, 0x82, 0x82, 0x82, 0x82, 0x82,
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0xfc, 0x00, 0x7c, 0x82, 0x80, 0xf0, 0x80, 0x82,
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0x7c, 0x00, 0x7c, 0x82, 0x80, 0xf0, 0x80, 0x80,
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0x80, 0x80,
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};
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const Uint8 uxn_rom[] = { // screen vector test ROM
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0x20, 0x01, 0x19, 0x80, 0x20, 0x37, 0x20, 0x0f,
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0x7f, 0x80, 0x08, 0x37, 0x20, 0x0f, 0xe0, 0x80,
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0x0a, 0x37, 0x20, 0x0f, 0xc0, 0x80, 0x0c, 0x37,
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0x00, 0x80, 0x00, 0x30, 0x21, 0x23, 0x80, 0x00,
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0x31, 0x20, 0x00, 0x00, 0x80, 0x28, 0x37, 0x20,
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0x00, 0x00, 0x80, 0x2a, 0x37, 0x80, 0x01, 0x0f,
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0x05, 0x03, 0x80, 0x04, 0x1f, 0x80, 0x00, 0x05,
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0x80, 0x30, 0x3f, 0x20, 0x01, 0xb2, 0x38, 0x80,
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0x2c, 0x37, 0xcf, 0x80, 0x2f, 0x17, 0x80, 0x0f,
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0x1c, 0x80, 0x00, 0x05, 0x80, 0x30, 0x3f, 0x20,
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0x01, 0xb2, 0x38, 0x80, 0x2c, 0x37, 0x80, 0x28,
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0x36, 0x20, 0x00, 0x08, 0x38, 0x80, 0x28, 0x37,
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0xcf, 0x80, 0x2f, 0x17, 0x03, 0x80, 0x04, 0x1f,
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0x80, 0x00, 0x05, 0x80, 0x30, 0x3f, 0x20, 0x01,
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0xb2, 0x38, 0x80, 0x2c, 0x37, 0x80, 0x28, 0x36,
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0x20, 0x00, 0x08, 0x38, 0x80, 0x28, 0x37, 0xcf,
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0x80, 0x2f, 0x17, 0x80, 0x0f, 0x1c, 0x80, 0x00,
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0x05, 0x80, 0x30, 0x3f, 0x20, 0x01, 0xb2, 0x38,
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0x80, 0x2c, 0x37, 0x80, 0x28, 0x36, 0x20, 0x00,
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0x08, 0x38, 0x80, 0x28, 0x37, 0x4f, 0x80, 0x2f,
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0x17, 0x00, 0x0f, 0x38, 0x67, 0x5f, 0xdf, 0xbf,
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0xbf, 0xbf, 0x00, 0x07, 0x18, 0x20, 0x23, 0x44,
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0x48, 0x48, 0x00, 0x7c, 0x82, 0x82, 0x82, 0x82,
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0x82, 0x7c, 0x00, 0x30, 0x10, 0x10, 0x10, 0x10,
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0x10, 0x10, 0x00, 0x7c, 0x82, 0x02, 0x7c, 0x80,
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0x80, 0xfe, 0x00, 0x7c, 0x82, 0x02, 0x1c, 0x02,
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0x82, 0x7c, 0x00, 0x0c, 0x14, 0x24, 0x44, 0x84,
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0xfe, 0x04, 0x00, 0xfe, 0x80, 0x80, 0x7c, 0x02,
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0x82, 0x7c, 0x00, 0x7c, 0x82, 0x80, 0xfc, 0x82,
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0x82, 0x7c, 0x00, 0x7c, 0x82, 0x02, 0x1e, 0x02,
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0x02, 0x02, 0x00, 0x7c, 0x82, 0x82, 0x7c, 0x82,
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0x82, 0x7c, 0x00, 0x7c, 0x82, 0x82, 0x7e, 0x02,
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0x82, 0x7c, 0x00, 0x7c, 0x82, 0x02, 0x7e, 0x82,
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0x82, 0x7e, 0x00, 0xfc, 0x82, 0x82, 0xfc, 0x82,
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0x82, 0xfc, 0x00, 0x7c, 0x82, 0x80, 0x80, 0x80,
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0x82, 0x7c, 0x00, 0xfc, 0x82, 0x82, 0x82, 0x82,
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0x82, 0xfc, 0x00, 0x7c, 0x82, 0x80, 0xf0, 0x80,
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0x82, 0x7c, 0x00, 0x7c, 0x82, 0x80, 0xf0, 0x80,
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0x80, 0x80, 0x80,
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};
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static Uxn u;
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static Ppu ppu;
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static Device *devsystem, *devconsole, *devscreen;
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unsigned int palette[3];
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static Uint8 framebuffer[LCD_HEIGHT * LCD_WIDTH * 4];
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static void
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memzero8(void *src, uint64_t n)
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{
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uint8_t * ptr = src;
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for (size_t i = 0; i < n; i++) {
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ptr[i] = 0;
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}
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}
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/* taken from uxncli */
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static void
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inspect(Stack *s, char *name)
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{
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Uint8 x, y;
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DEBUGF("\n%s\n", name);
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for(y = 0; y < 0x04; ++y) {
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for(x = 0; x < 0x08; ++x) {
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Uint8 p = y * 0x08 + x;
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DEBUGF(p == s->ptr ? "[%02x]" : " %02x ",
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s->dat[p]);
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}
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DEBUGF("\n");
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}
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}
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static void
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set_palette(Uint8 *addr)
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{
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#if LCD_DEPTH > 1
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int i;
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for(i = 0; i < 4; ++i) {
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Uint8
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r = (*(addr + i / 2) >> (!(i % 2) << 2)) & 0x0f,
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g = (*(addr + 2 + i / 2) >> (!(i % 2) << 2)) & 0x0f,
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b = (*(addr + 4 + i / 2) >> (!(i % 2) << 2)) & 0x0f;
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palette[i] = LCD_RGBPACK(r*8,g*8,b*8);
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}
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#else
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int i;
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for(i = 0; i < 4; ++i) {
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Uint8
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sum = (*(addr + i / 2) >> (!(i % 2) << 2)) & 0x0f;
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sum += (*(addr + 2 + i / 2) >> (!(i % 2) << 2)) & 0x0f;
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sum += (*(addr + 4 + i / 2) >> (!(i % 2) << 2)) & 0x0f;
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palette[i] = sum > 0x17;
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}
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#endif
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}
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/* taken from uxncli */
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static int
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system_talk(Device *d, Uint8 b0, Uint8 w)
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{
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if(!w) { /* read */
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switch(b0) {
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case 0x2: d->dat[0x2] = d->u->wst.ptr; break;
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case 0x3: d->dat[0x3] = d->u->rst.ptr; break;
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}
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} else { /* write */
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switch(b0) {
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case 0x2: d->u->wst.ptr = d->dat[0x2]; break;
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case 0x3: d->u->rst.ptr = d->dat[0x3]; break;
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case 0xe:
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inspect(&d->u->wst, "Working-stack");
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inspect(&d->u->rst, "Return-stack");
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break;
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case 0xf: return 0;
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}
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if(b0 > 0x7 && b0 < 0xe)
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set_palette(&d->dat[0x8]);
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}
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return 1;
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}
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/* taken from uxncli */
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static int
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console_talk(Device *d, Uint8 b0, Uint8 w)
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{
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if(b0 == 0x1)
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d->vector = peek16(d->dat, 0x0);
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if(w && b0 > 0x7)
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DEBUGF("%c",(char *)&d->dat[b0]);
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return 1;
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}
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/* taken from uxnemu */
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static int
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screen_talk(Device *d, Uint8 b0, Uint8 w)
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{
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if(!w) switch(b0) {
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case 0x2: d->dat[0x2] = ppu.width >> 8; break;
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case 0x3: d->dat[0x3] = ppu.width; break;
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case 0x4: d->dat[0x4] = ppu.height >> 8; break;
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case 0x5: d->dat[0x5] = ppu.height; break;
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}
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else
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switch(b0) {
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case 0x1: d->vector = peek16(d->dat, 0x0); break;
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case 0x5:
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break;
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case 0xe: {
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Uint16 x = peek16(d->dat, 0x8);
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Uint16 y = peek16(d->dat, 0xa);
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|
Uint8 layer = d->dat[0xe] & 0x40;
|
|
ppu_write(&ppu, !!layer, x, y, d->dat[0xe] & 0x3);
|
|
if(d->dat[0x6] & 0x01) poke16(d->dat, 0x8, x + 1); /* auto x+1 */
|
|
if(d->dat[0x6] & 0x02) poke16(d->dat, 0xa, y + 1); /* auto y+1 */
|
|
break;
|
|
}
|
|
case 0xf: {
|
|
Uint16 x = peek16(d->dat, 0x8);
|
|
Uint16 y = peek16(d->dat, 0xa);
|
|
Uint8 layer = d->dat[0xf] & 0x40;
|
|
Uint8 *addr = &d->mem[peek16(d->dat, 0xc)];
|
|
if(d->dat[0xf] & 0x80) {
|
|
ppu_2bpp(&ppu, !!layer, x, y, addr, d->dat[0xf] & 0xf, d->dat[0xf] & 0x10, d->dat[0xf] & 0x20);
|
|
if(d->dat[0x6] & 0x04) poke16(d->dat, 0xc, peek16(d->dat, 0xc) + 16); /* auto addr+16 */
|
|
} else {
|
|
ppu_1bpp(&ppu, !!layer, x, y, addr, d->dat[0xf] & 0xf, d->dat[0xf] & 0x10, d->dat[0xf] & 0x20);
|
|
if(d->dat[0x6] & 0x04) poke16(d->dat, 0xc, peek16(d->dat, 0xc) + 8); /* auto addr+8 */
|
|
}
|
|
if(d->dat[0x6] & 0x01) poke16(d->dat, 0x8, x + 8); /* auto x+8 */
|
|
if(d->dat[0x6] & 0x02) poke16(d->dat, 0xa, y + 8); /* auto y+8 */
|
|
break;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
nil_talk(Device *d, Uint8 b0, Uint8 w)
|
|
{
|
|
(void)d;
|
|
(void)b0;
|
|
(void)w;
|
|
return 1;
|
|
}
|
|
|
|
// TODO optimise, make build on non-color devices
|
|
static void redraw(void)
|
|
{
|
|
rb->lcd_clear_display();
|
|
Uint16 x, y;
|
|
for(y = 0; y < ppu.height; ++y)
|
|
for(x = 0; x < ppu.width; ++x) {
|
|
#if LCD_DEPTH > 1
|
|
rb->lcd_set_foreground(palette[ppu_read(&ppu, x, y)]);
|
|
rb->lcd_drawpixel(x, y);
|
|
#else
|
|
if(palette[ppu_read(&ppu, x, y)]) {
|
|
rb->lcd_drawpixel(x, y);
|
|
}
|
|
#endif
|
|
}
|
|
rb->lcd_update();
|
|
ppu.reqdraw = 0;
|
|
|
|
}
|
|
|
|
int
|
|
uxn_halt(Uxn *u, Uint8 error, char *name, int id)
|
|
{
|
|
rb->splash(HZ, "Halted\n");
|
|
return 0;
|
|
}
|
|
|
|
static void run() {
|
|
while(!devsystem->dat[0xf]) {
|
|
uxn_eval(&u, devscreen->vector);
|
|
if(ppu.reqdraw || devsystem->dat[0xe])
|
|
redraw();
|
|
switch(rb->button_get(false)) {
|
|
case BUTTON_NONE: break;
|
|
default:
|
|
return;
|
|
}
|
|
rb->sleep(HZ/60);
|
|
}
|
|
}
|
|
|
|
/* this is the plugin entry point */
|
|
|
|
enum plugin_status plugin_start(const void* parameter)
|
|
{
|
|
|
|
(void)parameter;
|
|
|
|
DEBUGF("Setting PPU size\n");
|
|
ppu_init(&ppu, LCD_WIDTH, LCD_HEIGHT, framebuffer);
|
|
DEBUGF("UXN init\n");
|
|
// Clear RAM and copy rom to VM.
|
|
DEBUGF("zeroing\n");
|
|
memzero8(&u, sizeof(Uxn));
|
|
DEBUGF("copying ROM\n");
|
|
memcpy(u.ram.dat + PAGE_PROGRAM, uxn_rom, sizeof(uxn_rom));
|
|
DEBUGF("registering ports\n");
|
|
// Register ports
|
|
/* system */ devsystem = uxn_port(&u, 0x0, system_talk);
|
|
/* console */ devconsole = uxn_port(&u, 0x1, console_talk);
|
|
/* screen */ devscreen = uxn_port(&u, 0x2, screen_talk);
|
|
/* audio0 */ uxn_port(&u, 0x3, nil_talk);
|
|
/* audio1 */ uxn_port(&u, 0x4, nil_talk);
|
|
/* audio2 */ uxn_port(&u, 0x5, nil_talk);
|
|
/* audio3 */ uxn_port(&u, 0x6, nil_talk);
|
|
/* empty */ uxn_port(&u, 0x7, nil_talk);
|
|
/* control */ uxn_port(&u, 0x8, nil_talk);
|
|
/* mouse */ uxn_port(&u, 0x9, nil_talk);
|
|
/* file */ uxn_port(&u, 0xa, nil_talk);
|
|
/* datetime */ uxn_port(&u, 0xb, nil_talk);
|
|
/* empty */ uxn_port(&u, 0xc, nil_talk);
|
|
/* empty */ uxn_port(&u, 0xd, nil_talk);
|
|
/* empty */ uxn_port(&u, 0xe, nil_talk);
|
|
/* empty */ uxn_port(&u, 0xf, nil_talk);
|
|
DEBUGF("eval\n");
|
|
uxn_eval(&u, 0x0100);
|
|
run();
|
|
return PLUGIN_OK;
|
|
|
|
}
|