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モニター Donn Steward CPUville 8-bitのPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。Donn Steward CPUville 8-bit 14 ページ。 Processor register display kit
ページを印刷するRegister Display Schematic
The register display is simple. The register outputs and processor flags are brought to the inputs of the
74LS240 inverting buffers from the main board through the display connector. The state and system
clock signals are brought in from the control board through the 16-pin front panel connector. The LEDs
are connected to the buffer outputs so that the buffer "sinks" current from the LED, causing it to light
when the buffer input is +5V (a logical 1). The pushbuttons and clock and reset switches are connected
to their respective circuits on the control board through the front panel connector. The bypass
capacitors filter out power line voltage spikes.
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