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Annotation of previous/src/dimension/nd_vio.c, revision 1.1

1.1     ! root        1: #include <stdio.h>
        !             2: #include <limits.h>
        !             3: #include <stdlib.h>
        !             4: 
        !             5: #include "main.h"
        !             6: #include "configuration.h"
        !             7: #include "m68000.h"
        !             8: #include "sysdeps.h"
        !             9: #include "dimension.h"
        !            10: #include "nd_vio.h"
        !            11: #include "i860cfg.h"
        !            12: #include "nd_sdl.h"
        !            13: #include "host.h"
        !            14: 
        !            15: 
        !            16: #define LOG_VID_LEVEL   LOG_WARN
        !            17: 
        !            18: /* --------- NEXTDIMENSION VIDEO I/O ---------- *
        !            19:  *                                              *
        !            20:  * Code for NeXTdimension video I/O. For now    *
        !            21:  * only some dummy devices.                     */
        !            22: 
        !            23: 
        !            24: #define ND_VID_DMCD     0x8A
        !            25: #define ND_VID_DCSC0    0xE0
        !            26: #define ND_VID_DCSC1    0xE2
        !            27: 
        !            28: 
        !            29: /* SAA7191 (Digital Multistandard Colour Decoder - Square Pixel) */
        !            30: 
        !            31: #define ND_DMCD_NUM_REG 25
        !            32: 
        !            33: struct {
        !            34:     uae_u8 addr;
        !            35:     uae_u8 reg[ND_DMCD_NUM_REG];
        !            36: } dmcd;
        !            37: 
        !            38: 
        !            39: void dmcd_write(uae_u32 step, uae_u8 data) {
        !            40:     if (step == 0) {
        !            41:         dmcd.addr = data;
        !            42:     } else {
        !            43:         Log_Printf(LOG_VID_LEVEL, "[ND] DMCD: Writing register %i (%02X)", dmcd.addr, data);
        !            44:         
        !            45:         if (dmcd.addr < ND_DMCD_NUM_REG) {
        !            46:             dmcd.reg[dmcd.addr] = data;
        !            47:             dmcd.addr++;
        !            48:         } else {
        !            49:             Log_Printf(LOG_WARN, "[ND] DMCD: Illegal register (%i)", dmcd.addr);
        !            50:         }
        !            51:     }
        !            52: }
        !            53: 
        !            54: 
        !            55: /* SAA7192 (Digital Colour Space Converter) */
        !            56: 
        !            57: #define ND_DCSC_CTRL    0x00
        !            58: #define ND_DCSC_CLUT    0x01
        !            59: 
        !            60: struct {
        !            61:     uae_u8 addr;
        !            62:     uae_u8 ctrl;
        !            63:     uae_u8 lut_r[256];
        !            64:     uae_u8 lut_g[256];
        !            65:     uae_u8 lut_b[256];
        !            66: } dcsc[2];
        !            67: 
        !            68: 
        !            69: void dcsc_write(uae_u8 dev, uae_u32 step, uae_u8 data) {
        !            70:     switch (step) {
        !            71:         case 0:
        !            72:             dcsc[dev].addr = data;
        !            73:             break;
        !            74:         case 1:
        !            75:             if (dcsc[dev].addr == ND_DCSC_CTRL) {
        !            76:                 Log_Printf(LOG_VID_LEVEL, "[ND] DCSC%i: Writing control (%02X)", dev, data);
        !            77:                 
        !            78:                 dcsc[dev].ctrl = data;
        !            79:                 break;
        !            80:             }
        !            81:             /* else fall through */
        !            82: 
        !            83:         default:
        !            84:             if (dcsc[dev].addr == ND_DCSC_CLUT) {
        !            85:                 Log_Printf(LOG_VID_LEVEL, "[ND] DCSC%i: Writing LUT at %i (%02X)", dev, step-1, data);
        !            86: 
        !            87:                 dcsc[dev].lut_r[(step-1)&0xFF] = data;
        !            88:                 dcsc[dev].lut_g[(step-1)&0xFF] = data;
        !            89:                 dcsc[dev].lut_b[(step-1)&0xFF] = data;
        !            90:             } else {
        !            91:                 Log_Printf(LOG_WARN, "[ND] DCSC%i: Unknown address (%02X)", dev, dcsc[dev].addr);
        !            92:             }
        !            93:             break;
        !            94:     }
        !            95: }
        !            96: 
        !            97: 
        !            98: /* Receiver function (from IIC bus) */
        !            99: 
        !           100: void nd_video_dev_write(uae_u8 addr, uae_u32 step, uae_u8 data) {
        !           101:     
        !           102:     if (addr&0x01) {
        !           103:         Log_Printf(LOG_WARN, "[ND] IIC bus: Unimplemented read from video device at %02X", addr);
        !           104:     }
        !           105:     
        !           106:     if (step == 0) {
        !           107:         Log_Printf(LOG_VID_LEVEL, "[ND] IIC bus: selecting device at %02X (subaddress: %02X)", addr, data);
        !           108:     }
        !           109:     
        !           110:     switch (addr&0xFE) {
        !           111:         case ND_VID_DMCD:
        !           112:             dmcd_write(step, data);
        !           113:             break;
        !           114:         case ND_VID_DCSC0:
        !           115:             dcsc_write(0, step, data);
        !           116:             break;
        !           117:         case ND_VID_DCSC1:
        !           118:             dcsc_write(1, step, data);
        !           119:             break;
        !           120:             
        !           121:         default:
        !           122:             Log_Printf(LOG_WARN, "[ND] IIC bus: Unknown device (%02X)", addr);
        !           123:             break;
        !           124:     }
        !           125: }

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