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comparison vdp.c @ 1377:e587f16e7d3d

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Implemented SMS pause button
author Michael Pavone <pavone@retrodev.com>
date Sun, 28 May 2017 21:03:55 -0700
parents 5b20840711c1
children 71c8b97eb962
comparison
equal deleted inserted replaced
1376:70d88d9bfe13 1377:e587f16e7d3d
1683 } 1683 }
1684 context->vcounter &= 0x1FF; 1684 context->vcounter &= 0x1FF;
1685 if (context->state == PREPARING) { 1685 if (context->state == PREPARING) {
1686 context->state = ACTIVE; 1686 context->state = ACTIVE;
1687 } 1687 }
1688 if (context->vcounter == 0x1FF) {
1689 context->flags2 &= ~FLAG2_PAUSE;
1690 }
1688 1691
1689 if (context->state != ACTIVE) { 1692 if (context->state != ACTIVE) {
1690 context->hint_counter = context->regs[REG_HINT]; 1693 context->hint_counter = context->regs[REG_HINT];
1691 } else if (context->hint_counter) { 1694 } else if (context->hint_counter) {
1692 context->hint_counter--; 1695 context->hint_counter--;
3381 cycles_to_vint += (256 - LINE_CHANGE_MODE4 + VINT_SLOT_MODE4) * MCLKS_SLOT_H32; 3384 cycles_to_vint += (256 - LINE_CHANGE_MODE4 + VINT_SLOT_MODE4) * MCLKS_SLOT_H32;
3382 } 3385 }
3383 return context->cycles + cycles_to_vint; 3386 return context->cycles + cycles_to_vint;
3384 } 3387 }
3385 3388
3389 uint32_t vdp_next_nmi(vdp_context *context)
3390 {
3391 if (!(context->flags2 & FLAG2_PAUSE)) {
3392 return 0xFFFFFFFF;
3393 }
3394 return context->cycles + vdp_cycles_to_line(context, 0x1FF);
3395 }
3396
3397 void vdp_pbc_pause(vdp_context *context)
3398 {
3399 context->flags2 |= FLAG2_PAUSE;
3400 }
3401
3386 void vdp_int_ack(vdp_context * context) 3402 void vdp_int_ack(vdp_context * context)
3387 { 3403 {
3388 //CPU interrupt acknowledge is only used in Mode 5 3404 //CPU interrupt acknowledge is only used in Mode 5
3389 if (context->regs[REG_MODE_2] & BIT_MODE_5) { 3405 if (context->regs[REG_MODE_2] & BIT_MODE_5) {
3390 //Apparently the VDP interrupt controller is not very smart 3406 //Apparently the VDP interrupt controller is not very smart