Scrumpel 7d Z8S180 SBC

Details

The goal of this board is to have a complete computer-system on one PCB. It has no bus for expansions but has enough I/O to play with. The first serial port uses RTS/CTS handshaking, the second serial port doesn't. The console is on the first serial port. All components, except the CPU are trough-hole components, so easy to build. For the CPU a PLCC trough hole IC-socket is used.

A DS3234 RTC module from Dead-on is necessary for full functionality of the monitor. This module is shown in the middle of the picture below. On the right the micro SD-card module with levelconverter 5V to 3.3V is shown. On the left the serial TTL (5V) to RS232 module.

The Dead-on RTC DS3234 module is very expensive, so I designed my own module with a more commonly available battery. See picture below.

Scrumpel 7d is certified opensource hardware by the Open Source Hardware Association.

Files

zcpm.tgz

A compressed 512 MB diskimage, containing ZCPM for sd-card less or equal then 2GB. This image contains several utilities usable for Scrumpel7d on disk A:. It can be booted by the CP/M boot command in the Z180 monitor.

x-gzip - 755.01 kB - 07/12/2020 at 08:01

Download

monz180rom.hex

This is an Intel-hex file that contains the monitor for Scrumpel 7d. This version is a revision of the previous Scrumpel monitor, It support Grant Searle CP/M boot, the LCD and DS3234 RTC. It has a RTC autodetect and temperature read-out. If no RTC is detected, all RTC related functions are disabled. The DEFAULT BAUDRATE is 38400 in stead of 9600 baud.

- 19.66 kB - 06/03/2020 at 05:06

Download

scrumpel7d.pdf

This is the Schematic diagram of Scrumpel 7d

Adobe Portable Document Format - 194.21 kB - 05/07/2020 at 04:35

Preview

scrumpel7dv12.zip

These are the gerber files needed for making a Scrumpel 7d PCB, Silk screen looks better with better text lay-out

application/zip - 235.13 kB - 05/07/2020 at 04:30

Download

Components

13 × 100 nF Ceramic capacitor

1 × Z8S18033VSC CPU

1 × 82C55A 8MHz Parallel port

1 × Bus header female 7 pins Connector

2 × ASC6C4008 55nS SRAM 512K*8

Project Logs

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New version monz180rom.hex
Nick Brok • 08/05/2020 at 06:56 • 0 comments

New hex file of monz180 uploaded. Issue with uninitialized stack solved.
Changed first startup instructions
Nick Brok • 07/18/2020 at 07:43 • 0 comments

The LCD must be installed to run the monitor.
A 512 MB ZCP/M diskimage added
Nick Brok • 07/12/2020 at 08:27 • 0 comments

With this image you can boot ZCP/M from a sd-card.
New version monitor uploaded. (V1.11)
Nick Brok • 07/06/2020 at 04:01 • 0 comments

New functions in the Scrumpel monitor added. See new screenshots below. ATTENTION: Default baudrate is changed to 38400 baud.
Gerber files Scrumpel7d updated
Nick Brok • 06/17/2020 at 11:43 • 0 comments

I have the newest version of diptrace and I've generated a cleaner and nicer gerberfile.
Added more details
Nick Brok • 06/06/2020 at 08:04 • 0 comments

Some photo's added to illustrate the used modules.
Scrumpel7d monitor is now called monz180
Nick Brok • 06/03/2020 at 05:13 • 0 comments

This is the final release of the monitor for Scrumpel 7d. This replace the previous version. The Intel-hex file can be loaded into your Eprom programmer to program the 27C256.

The monitor supports LCD, RTC DS3234 and Grant Searle CP/M boot.

To show the available commands press ? and a help screen is shown.
Some information of the CPU
Changed first startup instructions
Nick Brok • 06/03/2020 at 04:58 • 0 comments

Added default COM1 settings in startup.
Added components
Nick Brok • 05/11/2020 at 06:03 • 0 comments

Extra components added
Instruction updates
Nick Brok • 05/11/2020 at 05:38 • 0 comments

Added instruction how to position the LEDS.

View all 12 project logs

Build Instructions

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Soldering ceramic capacitors

The capacitor C7 (CPU) must be placed on the solderside of he PCB and soldered on the component side, before placing the IC socket.

Led polarity: Power, Disk, Reset and Halt.

The square pad on the PCB indicates the Cathode side of the LED. Long leg of LED is the Anode.

First start-up

After inserting the ROM with the Scrumpel monitor you can power-up the board. But you need to connect COM1 via FTDI or better a TTL-to-RS232 converter to a PC running a terminal program with hardware handshaking on. Otherwise the board will not run the monitor, because it's waiting for sending serial info on COM1. The default speed is set to 38400, data is 8N1 ( 8 bits, no parity, 1 stopbit). The Dead-on DS3234 RTC-module is required for saving and setting the baudrate to another speed.

If you have connected the 20*4 LCD some info is shown with the current time and date if the RTC is also inserted. On the terminal the monitor greets you with displaying monitor greetings and, if RTC is installed the current temperature, time and date.

ATTENTION! You must install the LC- display to be able running the monitor. The software uses hardware LCD-status check, if no LCD is installed the monitor is waiting for LCD to become ready.

Discussions

Scrumpel 7d Z8S180 SBC

Description

Details