Firmware, RomWBW, sc140

This configuration is specifically for the SC140, Z180 SBC/ Z50Bus Card.

The latest release of this Firmware is detailed in the table below.

NameWayne Warthen’s RomWBW
PlatformSCZ180
Configuration140
Release v3.0, build 2021-01-19
DownloadSC140 RomWBW SCZ180_140 2021-01-19
Device Programming:
Code size512k bytes
Checksum02CE 10A2 (MiniPro 6.6, SST39SF040)
Recommended ICSST39SF040-70
Core Components:
HBIOSVersion 3.0, build 2021-01-19
Included Apps:
– CamelForthVersion 1.02
– CP/MVersion 2.2, CBIOS v3.0 [WBW]
– MonitorVersion unknown
– NASCOM BASICVersion 4.7b
– Tasty BASICVersion unknown
– Z-SystemVersion 1.1, CBIOS v3.0 [WBW]

The firmware is supplied (above) as a binary format file, which is suitable for use by most PROM programmers.

RomWBW’s documentation can be found here.

The very latest version, source code and documentation for RomWBW can be found here.

Supported Devices

  • SC140 Z180 SBC / Z50Bus card
    • Z180 CPU (eg. Z8S180xx)
    • Z180’s asynchronous serial ports
    • SD card at 0x0C
  • Real Time Clock at 0x0C
  • Status LEDs at 0x0D
  • Compact Flash at 0x10 for loading CP/M

The lack of specific support does not exclude the use of other hardware. It just means the ROM does not do anything specific with it.

Supported Modules

  • Mass storage (CF card, port 0x10)
    • SC144 CF card interface for Z50Bus
  • Real time clock (DS1302, port 0x0C)
    • SC144 CF card interface for Z50Bus
  • Self-test / status BYTE (8 LEDs, port 0x0D)
    • LiNC digital I/O module for Z50Bus

The lack of specific support does not exclude the use of other hardware. It just means the ROM does not do anything specific with it.

Release Notes

The Z180’s internal I/O is set to the range 0xC0 to 0xFF.

Homebrew 8-bit retro computing