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Banking When It Shouldn't

A project log for 3-Chip Z80 Design

Combining a Z80 retro design with a modern PSoC CPU.

land-boardscomland-boards.com 10/11/2019 at 02:100 Comments

Banking was coming on by default.

Added bank control to shut off banking at power on.

Setting MSK[5]  to default to '1' at power up. This should maked BANKED signal off.

BANKED was causing the map to be selected which was defaulted to zero. Hence, CPUA11 to CPUA15 was being over-ridden by the bank register value of 0x0.

It is not yet running but I do see the A14 and A15 address lines being passed through the PSoC.

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