+static int t_irq_hint(void)
+{
+ u16 *ram = (u16 *)0xfff000;
+ u8 *ram8 = (u8 *)0xfff000;
+ u16 v_p, cnt_p;
+ int ok = 1;
+
+ // for more fun, disable the display
+ VDP_setReg(VDP_MODE2, VDP_MODE2_MD);
+
+ ram[0] = ram[1] = ram[2] = 0;
+ memcpy_((void *)0xff0100, test_hint, test_hint_end - test_hint);
+ VDP_setReg(10, 0);
+ while (read8(VDP_HV_COUNTER) != 100)
+ ;
+ while (read8(VDP_HV_COUNTER) != 229)
+ ;
+ // take the pending irq
+ VDP_setReg(VDP_MODE1, VDP_MODE1_PS | VDP_MODE1_IE1);
+ move_sr(0x2000);
+ burn10(488 * 2 / 10);
+ move_sr(0x2700);
+ v_p = ram8[2];
+ cnt_p = ram[0];
+ ram[0] = ram[1] = ram[2] = 0;
+ // count irqs
+ move_sr(0x2000);
+ while (read8(VDP_HV_COUNTER) != 3)
+ ;
+ while (read8(VDP_HV_COUNTER) != 228)
+ ;
+ move_sr(0x2700);
+ VDP_setReg(VDP_MODE1, VDP_MODE1_PS);
+ VDP_setReg(VDP_MODE2, VDP_MODE2_MD | VDP_MODE2_DMA | VDP_MODE2_DISP);
+
+ expect(ok, v_p, 229); // pending irq trigger
+ expect(ok, cnt_p, 1);
+ expect(ok, ram[0], 225); // count
+ expect(ok, ram8[2], 0); // first line
+ expect(ok, ram8[4], 224); // last line
+ return ok;
+}
+
+static int t_irq_ack_v_h(void)
+{
+ u16 *ram = (u16 *)0xfff000;
+ u8 *ram8 = (u8 *)0xfff000;
+ u16 s0, s1, s2;
+ int ok = 1;
+
+ ram[0] = ram[1] = ram[2] =
+ ram[4] = ram[5] = ram[6] = 0;
+ memcpy_((void *)0xff0100, test_hint, test_hint_end - test_hint);
+ memcpy_((void *)0xff0140, test_vint, test_vint_end - test_vint);
+ VDP_setReg(10, 0);
+ VDP_setReg(VDP_MODE1, VDP_MODE1_PS | VDP_MODE1_IE1);
+ VDP_setReg(VDP_MODE2, VDP_MODE2_MD | VDP_MODE2_IE0);
+ while (read8(VDP_HV_COUNTER) != 100)
+ ;
+ while (read8(VDP_HV_COUNTER) != 226)
+ ;
+ s0 = read16(VDP_CTRL_PORT);
+ s1 = move_sr_and_read(0x2500, VDP_CTRL_PORT);
+ burn10(666 / 10);
+ s2 = move_sr_and_read(0x2000, VDP_CTRL_PORT);
+ burn10(488 / 10);
+ move_sr(0x2700);
+ VDP_setReg(VDP_MODE1, VDP_MODE1_PS);
+ VDP_setReg(VDP_MODE2, VDP_MODE2_MD | VDP_MODE2_DMA | VDP_MODE2_DISP);
+
+ expect(ok, ram[4], 1); // vint count
+ expect(ok, ram8[10], 226); // vint line
+ expect(ok, ram[0], 1); // hint count
+ expect(ok, ram8[2], 228); // hint line
+ expect_bits(ok, s0, SR_F, SR_F);
+ expect_bits(ok, s1, 0, SR_F);
+ expect_bits(ok, s2, 0, SR_F);
+ return ok;
+}
+
+static int t_irq_ack_h_v(void)
+{
+ u16 *ram = (u16 *)0xfff000;
+ u8 *ram8 = (u8 *)0xfff000;
+ u16 s0, s1, s[4];
+ int ok = 1;
+
+ ram[0] = ram[1] = ram[2] =
+ ram[4] = ram[5] = ram[6] = 0;
+ memcpy_((void *)0xff0100, test_hint, test_hint_end - test_hint);
+ memcpy_((void *)0xff0140, test_vint, test_vint_end - test_vint);
+ VDP_setReg(10, 0);
+ while (read8(VDP_HV_COUNTER) != 100)
+ ;
+ while (read8(VDP_HV_COUNTER) != 226)
+ ;
+ s0 = read16(VDP_CTRL_PORT);
+ VDP_setReg(VDP_MODE1, VDP_MODE1_PS | VDP_MODE1_IE1);
+ move_sr(0x2000);
+ burn10(666 / 10);
+ s1 = read16(VDP_CTRL_PORT);
+ write_and_read1(VDP_CTRL_PORT, 0x8000 | (VDP_MODE2 << 8)
+ | VDP_MODE2_MD | VDP_MODE2_IE0, s);
+ burn10(488 / 10);
+ move_sr(0x2700);
+ VDP_setReg(VDP_MODE1, VDP_MODE1_PS);
+ VDP_setReg(VDP_MODE2, VDP_MODE2_MD | VDP_MODE2_DMA | VDP_MODE2_DISP);
+
+ expect(ok, ram[0], 1); // hint count
+ expect(ok, ram8[2], 226); // hint line
+ expect(ok, ram[4], 1); // vint count
+ expect(ok, ram8[10], 228); // vint line
+ expect_bits(ok, s0, SR_F, SR_F);
+ expect_bits(ok, s1, SR_F, SR_F);
+ expect_bits(ok, s[0], SR_F, SR_F);
+ expect_bits(ok, s[1], SR_F, SR_F);
+ expect_bits(ok, s[2], 0, SR_F);
+ expect_bits(ok, s[3], 0, SR_F);
+ return ok;
+}
+