Simple Z80 test design - single board with all the basics and a few luxuries.
**NOTE EasyEDA shows the most recent WIP for this project, which might be part way through me making changes. Before using the PCB layout please do get in touch (comment or message) so I can let you know if what you're seeing is stable! I create labelled versions of the project, but EasyEDA doesn't allow me to publish a...
Pick-and-mix to create your own custom computer on a low-cost FPGA board
(BASIC, Z80, 6502, 6809, internal/external RAM, serial/keyboard+monitor, SD-card for CP/M or other storage)
by Grant Searle (2014)
Altera Cyclone IV E10 LQFP144 Port (ZEOWAA EP4CE10)
(c) 2018 Thorsten M. Wahl
**This is a hobby project and comes with no official support. The PCB schematic and board design files are offered 'as is' with no claims made about their fitness for any specific purpose.**
The Multicomper motherboard is a simple platform for creating a 'Multicomp' computer based on the design work of Grant Searle - which can be found here:
**CAUTION! UNTESTED – WORK IN PROGRESS – UNDER CONSTRUCTION**
**Retro Brew ECB BUS to 8 Bit ISA CARD adapter**
I plan to solder a 62 pin ISA BUS connector to the top of the card
and use a right-angle C96 for the ECB BUS connector.
This will allow the adapter to plug into the ECB Backplane.
I want to have a box full of ISA cards and would like to try using them with my ECB systems.
This board combines the best features of currently available RC2014 memory boards in one:
- One 512K memory chip which can be RAM or ROM (selected with 3 jumpers)
- One 512K RAM chip
- Select between linear and paged memory using a single jumper
- Select between linear and paged memory in software (from Z80 or BusRaider)
- Support for the PAGE pin on the RC2014 bus (with an optional pull-up selec...
This project is designed to be an easy build Z80 system.
The idea is that you can build the board without even fitting those tedious RC2014 sockets, then test it with the simple bit-bang serial port. That's 5 chips + oscillator + 6 pin header + a few Rs and Cs + LED + reset button. Looks like this takes about 175 solder joints. Sounds a lot, but way fewer than typical RC2014. Should be a good cha...
SC110 v1.1 (www.scc.me.uk)
Combined Z80 Serial Input/Output (SIO/2) and Z80 Counter/Timer (CTC) module for RC2014
- Full Z80 mode 2 interrupt support (IEI/IEO daisy-chain)
- Two TTL serial ports for use with FTDI serial adpter cables
- Four counter/timer channels
- Source of bus clock (option) to potentially reduce board count
- Serial port B baud rate controllable in software
Please refer to Dr. Scott M. Baker's blog below.
Home ∕ Electronics Projects ∕ Z80 Retrocomputing 5 – Single Stepper for RC2014
I'm very interested with the Dr. Scott's project TIL311 Bus Monitor Board and this Step Executor Board.
This time I'd like to make this board with my favorite parts like pod with tab control, alternate Toggle switch for single stepper.
Therefore I decided to make my own...
The design is based on SMBakers 64k memory module (www.smbaker.com).
Pageable 64k RAM memory module using 2x 32k RAM chips a 64kb ROM (16/32kb).
I recommend using SCMonitor R3 with this module for ordinary operation.
The module has been modified to be working with the #28 Z180 CPU module and SCMonitor 1.00 43.
Address selectable, the default address is $38.