1462 Results for "8-bit cpu"

about Maix Bit
Log from Portable Sound Visualization AR Device
Before starting the program, let's do a little research on the hardware.Official information about Maix Bit can be found here.https://wiki.sipeed.com/soft/maixpy/en/develop_kit_board/maix_bit.htmlhttps://dl.sipeed.com/shareURL/MAIX/HDK/Sipeed-Maix-BitThe...

Meet the New Boss: Same as the Old Boss
Log from Kestrel Computer Project
I've decided to switch to a hardware sequenced microarchitecture for the Kestrel-3 CPU. It will be built just like the 6502 was: it will have a two-stage pipeline (fetch and execute), both operated under a single micro-sequencer, and the microarchitecture...

It's been a hard days...
Log from OMEN Kilo
It was obvious from the very beginning of the whole OMEN story: I will build a computer with the famous 6809 CPU, or much better - with the HD6309 CPU. I took the basic concept from the OMEN Bravo, prepare a PCBs and... Here starts my pain Okay, let's...

General Architecture
Log from Nits Processor
The goal is to create a viable CPU with its own language able to run simple programs.It is based on a Von Neumann architecture with the following features: 8 bit shared data bus8 bit general purpose A register8 bit general purpose B register8 bit Program...

Schematic Debug
Log from CPU4
Schematic Debug I don't have very good tools to test my schematics but Tina can be coerced into something and something is better than nothing. Most the errors I find error are label errors but some of the Tina models are also wrong. Spend the day testing...

Hardware registers and microcode
Log from Kobold - retro TTL computer
REGISTERS The data width of the CPU is 8 bits. The CPU will now have four address registers (instead of the single HL register pair ). The address registers are 20 bits wide. Regular instructions will operate on the lowest 16 bits, and there will...

PCBs
Log from CPU4
PCBs The problem with PCBs is that one mistake and the board is useless. So divide and conquer, I have divide the CPU into three boards: RegistersInput, Output and memoryControl and ROM I need the Input and Output board in order to debug the monitor...

STEbus and VMEbus boards I am aware of.
Log from STEbus
Here are the STEbus and VMEbus boards I am aware of. I have some of them, and some documentation. Let me know which ones interest you. Code Name Title (Main features) [notes]J004 ARC8000 VMEbus Z8000J020 SC88 80188 (80188 and dynamic RAM)J023 SCPUA...

The architecture overview
Log from HB63C09M - Mini ITX 63C09 Form factor computer
As I wait for PCB's to arrive from PCBWay's factory in China, I thought I would spend a few moments to go over the general architecture of the computer. We can start with a simple memory map: The computer consists of a single 128K low...

Ultra low cost microcontrollers
Log from 1 dollar TinyML
If the complete BOM for sensor is to be under 1 USD, the microcontroller needs to be way below this. Preferably below 25% in order to leave budget for sensors, power and communication. Thankfully, there have been a lot of improvements in this area over...

Schematic of the CPU
Log from 1 Square Inch TTL CPU
Time to fully disclose the operation of the CPU ! The complete schematics can be found in the files section, SQ1C1841.PDF. REGISTER B Let's start with the simplest part. Since the CPU has no ALU, the most important task of the CPU is moving data...

Upgrading to 640x256
Log from Configurable video output for 6502 computers
I've generally been running this circuit at 384x256 resolution, and that's how it's configured in the schematics. The main clock is 16MHz, but this is halved to 8MHz to from the pixel clock. It's divided down a couple more times to 1MHz to...

Schematics: SPI LCD
Log from FunKey project - All your games on your keychain !
SPI LCD Screen One of FunKey's strong point is certainly its screen: in a chosen form factor of roughly 45x45x15mm (1.75x1.75x0.6"), it has to be comfortable enough to provide a good gaming experience. If in theory this allows to shoehorn a 2.4" (diagonal)...

Adding Interrupts (without hardware)
Log from 8 Bit TTA Interpreter
InterruptsOne way to add interrupts is for the interpreter to check each time it is called. This slows things down and imposes a condition. No process should "block" the interpreter.An example of a blocking sunroutine is "getchar". It waits until a character...

Preliminary Specifications
Log from STUPID Computer
Preliminary specifications for the new design (subject to change):1) 12-bit word size2) single accumulator3) will have carry bit (register)4) 4K words of RAM5) paged & indirect memory access6) 4 "indirect" registers7) RS-232 I/O @ 150, 300, 1200,...

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