Integrate a TP4056 or similar chip for safe USB-C charging.
+-------------------------------------------------------------+ | Your Modern Clone | +-------------------------------------------------------------+ | | | +---------------+ Data/Address Bus +-----------+ | | | Z80 CPU |<=========================>| | | | | (Real or Soft)| | | | | +---------------+ | FPGA / | | | | CPLD ULA | | | +---------------+ Shared Bus | REPLAY | | | | SRAM / Flash |<=========================>| | | | | (Memory) | | | | | +---------------+ +-----------+ | | || | | \/ | | +-----------+ | | | SPI/LCD | | | | Display | | | +-----------+ | +-------------------------------------------------------------+ 1. Core Logic: FPGA vs. CPLD vs. Microcontrollers
A ULA is an early ancestor of the modern Gate Array. Ferranti manufactured silicon wafers covered in a grid of uncommitted bipolar transistors. Sinclair then designed a single final masking layer to connect these transistors into specific logic gates. This allowed them to replace roughly 40 standard TTL logic chips with one single 40-pin integrated circuit (IC). Core Responsibilities of the ULA
Wire your Z80 CPU to your system RAM (or map them inside the FPGA fabric).
(CMOS version). It still runs at 3.5MHz and is widely available.
To make your microcomputer portable, you'll need to integrate:
Membrane matrix keyboards are difficult to manufacture at a small scale. For your portable device: Implement a clicky tact-switch micro-keyboard layout.
It continuously read video data from the system's RAM, generated the pixel and color attribute signals, and outputted them as a composite/RF television signal.
Replacing a faulty original ULA or building a system from scratch is best achieved via programmable logic. Chris Smith's landmark book, The ZX Spectrum ULA: How to Design a Microcomputer , reverse-engineered the exact schematic of the chip. You can implement this logic using: Xilinx XC95144XL CPLD Go to product viewer dialog for this item.
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Integrate a TP4056 or similar chip for safe USB-C charging.
+-------------------------------------------------------------+ | Your Modern Clone | +-------------------------------------------------------------+ | | | +---------------+ Data/Address Bus +-----------+ | | | Z80 CPU |<=========================>| | | | | (Real or Soft)| | | | | +---------------+ | FPGA / | | | | CPLD ULA | | | +---------------+ Shared Bus | REPLAY | | | | SRAM / Flash |<=========================>| | | | | (Memory) | | | | | +---------------+ +-----------+ | | || | | \/ | | +-----------+ | | | SPI/LCD | | | | Display | | | +-----------+ | +-------------------------------------------------------------+ 1. Core Logic: FPGA vs. CPLD vs. Microcontrollers
A ULA is an early ancestor of the modern Gate Array. Ferranti manufactured silicon wafers covered in a grid of uncommitted bipolar transistors. Sinclair then designed a single final masking layer to connect these transistors into specific logic gates. This allowed them to replace roughly 40 standard TTL logic chips with one single 40-pin integrated circuit (IC). Core Responsibilities of the ULA Integrate a TP4056 or similar chip for safe USB-C charging
Wire your Z80 CPU to your system RAM (or map them inside the FPGA fabric).
(CMOS version). It still runs at 3.5MHz and is widely available. CPLD vs
To make your microcomputer portable, you'll need to integrate:
Membrane matrix keyboards are difficult to manufacture at a small scale. For your portable device: Implement a clicky tact-switch micro-keyboard layout. Sinclair then designed a single final masking layer
It continuously read video data from the system's RAM, generated the pixel and color attribute signals, and outputted them as a composite/RF television signal.
Replacing a faulty original ULA or building a system from scratch is best achieved via programmable logic. Chris Smith's landmark book, The ZX Spectrum ULA: How to Design a Microcomputer , reverse-engineered the exact schematic of the chip. You can implement this logic using: Xilinx XC95144XL CPLD Go to product viewer dialog for this item.
