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comparison vdp.c @ 318:789f2f5f2277

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Implement hblank flag in status register
author Mike Pavone <pavone@retrodev.com>
date Fri, 10 May 2013 23:16:06 -0700
parents e5e8b48ad157
children 8e2fa485c0f2
comparison
equal deleted inserted replaced
317:e5e8b48ad157 318:789f2f5f2277
1191 value |= 0x100; 1191 value |= 0x100;
1192 } 1192 }
1193 if (context->flags2 & FLAG2_VINT_PENDING) { 1193 if (context->flags2 & FLAG2_VINT_PENDING) {
1194 value |- 0x80; 1194 value |- 0x80;
1195 } 1195 }
1196 uint32_t line= context->cycles / MCLKS_LINE;
1197 uint32_t linecyc = context->cycles % MCLKS_LINE;
1198 if (line >= (context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE)) {
1199 value |= 0x8;
1200 }
1201 if (linecyc < (context->latched_mode & BIT_H40 ? (148 + 61) * 4 : ( + 46) * 5)) {
1202 value |= 0x4;
1203 }
1196 if (context->flags & FLAG_DMA_RUN) { 1204 if (context->flags & FLAG_DMA_RUN) {
1197 value |= 0x2; 1205 value |= 0x2;
1198 } 1206 }
1199 uint32_t line= context->cycles / MCLKS_LINE;
1200 if (line >= (context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE)) {
1201 value |= 0x8;
1202 }
1203 if (context->latched_mode & BIT_PAL) {//Not sure about this, need to verify 1207 if (context->latched_mode & BIT_PAL) {//Not sure about this, need to verify
1204 value |= 0x1; 1208 value |= 0x1;
1205 } 1209 }
1206 //TODO: Lots of other bits in status port 1210 //TODO: Sprite overflow, sprite collision, odd frame flag
1207 return value; 1211 return value;
1208 } 1212 }
1209 1213
1210 uint16_t vdp_data_port_read(vdp_context * context) 1214 uint16_t vdp_data_port_read(vdp_context * context)
1211 { 1215 {