# Stegosaur RTC + MSX F4 Module for RC2014/RCBus

Give your RC2014/RCBus system a sense of time

- **Seller:** [Dino Boards](https://lectronz.com/stores/dino-boards), Melbourne, Victoria, Australia
- **Price:** $30.50 (USD, before shipping and taxes)
- **Availability:** In stock
- **Categories:** Retrocomputing
- **Product page:** https://lectronz.com/products/stegosaur-rtc-msx-f4-module-for-rc2014-rcbus

## Options

**MSX F4 Boot Register**

- MSX F4 Boot Reg Parts for Stegosaur RTC [Add $4.00] (1 left)
- No, thanks. I don't need this

**Retro Chips**

- Retro Chips for Stegosaur RTC + MSX F4 [Add $13.00] (1 left)
- No, thanks. I don't need this

## Links

- [Documentation](https://www.dinoboards.com.au/stegosaur/rtc/)

## Images

![Stegosaur RTC + MSX F4 Module for RC2014/RCBus](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDcwNzYsInB1ciI6ImJsb2JfaWQifX0=--edfdcdca68ef5be3d07eec6863e225b194093e6e/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/profile.jpg)
![Stegosaur RTC + MSX F4 Module for RC2014/RCBus](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDcwODAsInB1ciI6ImJsb2JfaWQifX0=--0e27547201583b1eafeb5c8223bfb99673d8a37c/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/pcb-front.jpg)
![Stegosaur RTC + MSX F4 Module for RC2014/RCBus](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDcwODQsInB1ciI6ImJsb2JfaWQifX0=--44a9e340755a91fe9389544260702a3dd2244803/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/parts-4-3.jpg)
![Stegosaur RTC + MSX F4 Module for RC2014/RCBus](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDcwODgsInB1ciI6ImJsb2JfaWQifX0=--a1f8e34a4e62918657de99ee7ae6315f411bf729/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/assembled.jpg)
![Stegosaur RTC + MSX F4 Module for RC2014/RCBus](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDcwOTIsInB1ciI6ImJsb2JfaWQifX0=--a8c27a5fa4ff4a375fb546b428509f289ba85034/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/retro-chips-4-3.jpg)
![Stegosaur RTC + MSX F4 Module for RC2014/RCBus](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDcwOTYsInB1ciI6ImJsb2JfaWQifX0=--7f5c4c77e5f65772a691c8c5e37c01d1d0a5b71b/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/reg-f4-parts-4-3.jpg)

## Description

Designed around the RP5C01 RTC chip, this kit gives your system the ability to remember the date and time when power is off. Its powered off

In addition to keeping time, it also has a small amount of onboard RAM, that is also powered by the battery when main power is off. This RAM can be used to store machine specific settings, such as boot screen color and mode.

It also includes a reliable power-on-reset feature, sending RESET signal to your CPU when power is first applied.

This kit is an alternative and updated version of the Yellow MSX RTC Kit.  Differences are listed below.

### Key Features

* MSX2 compatible Real Time Clock
* Optional Reset on Power signal
* MSX2+ compatible F4 cold/boot register
* Compatible with RomWBW

### What’s included?

The full kits includes everything you need (PCB, capacitors, IC sockets, connectors, and the ICs), with the retro chips optionally included.

The set of tested retro chips can be optionally included, or you can source your own.

The parts to enable the MSX specific F4 register feature can be optionally included.

A battery is not included. Requires a standard coin CR2450 battery.

### What else do I need?

This module can work in a standard RC2014/RCBus RomWBW bootable system, or a MSX configured bootable system.

### RomWBW Compatibility

A driver for this chip has been submitted and accepted by Wayne Warthen and is now included in the main release.

# Key difference with Yellow MSX RGB

| Description                      | Yellow MSX Version                  | Green Stegosaur Version          |
| -------------------------------- | ----------------------------------- | -------------------------------- |
| Calibration                      | on board trimmer capacitor | none                             |
| Battery                          | CR2032                              | CR2450                           |
| Diagnostic 'Alarm/Timing' Signal | exposed with pull up resistor       | Exposed, but no pull up resistor |
| PCB Height                       | 8.0 cm                              | 5.5 cm                           |
| Colour                           | Yellow                              | Green                            |


## Shipping policy

Normally shipped next working day, however during busy periods this may extend slightly.

It is your responsibility to pay any import duty or other taxes where appropriate, unless specified below:

For EU locations:
* Please see Lectronz's Terms and Condititions (https://lectronz.com/pages/terms_and_conditions)
* For order 150 EUR or over,  it will be your responsibility to pay any import duty or other taxes where appropriate.

For USA:
A 10% Tariff tax is applied at checkout.
Tariffs are prepaid by me prior to shipping.  You will not incur any additional tariff charges, upon receipt of your package.

For Australia:
Registered for GST.  Prices are listed exclusive of GST.  GST of 10% is applied at checkout.