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VDP9938 Sprite table registers

by M2X_E1 on 02-07-2021, 22:38
Score: 148.27 %, Type: Forum topic , Comments: 3 comments
(VDPregister6 * 0800h) with sprite base register (reg6) having the value 0x1F then the sprite base should calculated as 0x1f * 0x0800 = 0xF800 Fine so far, until I find that the actual sprite pattern data is stored at location E0D0, and displays fine on the crt screen. how can it be possible that the sprite ...

Z80A

by mars2000you on 02-12-2022, 10:57
Score: 124.86 %, Type: wiki , Comments: 0 comments
this pin is connected to +5V on MSX. So you can ignore it. The Z80 has three interrupt modes. Mode 0 ... depending on its state (0 or 1), provides information on the result of certain operations. This is described ... one-bit registers that serve as flags for interrupts. When IFF1 is 0 maskable interrupts are disabled. At ...
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