Description
A full MSX Memory System. 512K of ROM boot code and support software and up to 1MB of paged RAM. With these modules, you can boot into various MSX bios (open source CBIOS, MSX-BIOS/BASIC).
What is it?
The two modules work together to map in a 512K rom image for booting, and page in the RAM using specific MSX memory mapping techniques.
The 512K ROM image is mapped across a number opf MSX “slots” and “sub-slots” – enabling the storage of BIOS, Operating System and various applications and drivers.
The 2x512K RAM is mapped, using MSX’s memory page mapping, enabling compatible systems and applications the full use of the available RAM.
This module is designed for operation in conjunction with other MSX modules (CPU, GAME, RGB VIDEO, PPI & Keyboard)
Key features
- 512K ROM Image divided up to support various sub-systems
- up to 1MB of MSX paged banked memory
- MSX memory system compatibility
Key difference with Yellow MSX Memory
| Description | Yellow MSX Version | Green Stegosaur Version |
|---|---|---|
| Physical Layout | Single PCB for both ROM and RAM | Two separate PCBs for ROM and RAM |
| RAM Included | 2x512K (1MB) | 512K with optional extra 512K |
| Backplane Requirement | 80 Way RCBus or RC2014 via external Jumpers | Wired permanently to 80 Way RCBus ‘User’ lanes (37-40, 77-80) |
| PCB Height | 8.0 cm | 5.5 cm |
| Colour | Yellow | Green |
What’s included?
The full kits includes everything you need (2 PCB, capacitors, IC sockets, connectors, and the ICs).
The supplied ROM image will be flash with your choice of 50Hz or 60Hz CBIOS/MSX-DOS image. Additional ROM images are available for download that include MSX-BIOS and MSX-BASIC and configured for different regions.
What else do I need?
This module is the core of a MSX configured build. It will only enable a bootable system if you have the required additional MSX modules:
- Z80 Turbo CPU (or stock RC2014/RCBus Z80 CPU).
- V99x8 RGB Video Module.
- YM2149 GAME.
- PPI & Keyboard.
- 80-Way lane compatible backplane (eg: Yellow 12+1 backplane, or the Green Stegosaur 10+Slot backplane).
- Both the ROM and RAM modules must be installed together – they can not operate on their own and must have their 3 pin headers connected.
Product Details
For full product description, construction notes and other help – please see the main guide page at: https://www.dinoboards.com.au/stegosaur/memory/
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