*********************************************************************** *** *** *** R o m W B W *** *** *** *** Z80/Z180 System Software *** *** *** *********************************************************************** This directory ("Binary") is part of the RomWBW System Software distribution archive. Refer to the ReadMe.txt file in this directory for more information on the overall contents of the directory. When distributed, RomWBW contains a set of pre-built ROM images that are ready to program onto the EEPROM of any of the Z80/Z180 based RetroBrew Computers CPU boards. Additionally, any custom built ROM images will be placed in this directory. All of the pre-built ROM images are 512KB. This size is compatible with all of the Z80/Z180 systems. Some systems can accept different size ROM images. Creating alternative sizes requires a custom ROM build (see ReadMe.txt in the Source directory). It is critical that the right ROM Imgae be selected for the target platform being used. The table below indicates the correct ROM image to use for each platform: SBC V1/V2 SBC_std.rom Zeta V1 ZETA_std.rom Zeta V2 ZETA2_std.rom N8 N8_std.rom Mark IV MK4_std.rom RC2014 RC_std.rom RC2014 w/ Z180 RC180_std.rom Easy Z80 EZZ180_std.rom You will find there is one additional ROM image called "UNA_std.rom". This ROM image is an UNA-based RomWBW ROM image. As such, this ROM image can be used on any Z80/Z180 platform supported by John Coffman's UNA BIOS. Refer to RetroBrew Computers Wiki for more information on UNA hardware support. For each of the ROM Images (".rom"), there are corresponding files with the extensions of ".com" and ".img". The .com variant can be copied to a functional RomWBW-based system and executed like a normal application under CP/M or Z-System. This will load the new ROM on-the-fly. It is an excellent way to test a ROM Image before actually burning it. Similarly, the .img files can be loaded using the UNA FAT loader for testing. All of the standard ROM Images are configured with: - 512KB ROM Disk - 512KB RAM Disk - 38.4Kbps baud serial console (*) - Auto-discovery of all serial ports * RC2014 & Easy Z80 serial port speed is determined by hardware and is typically 115,200 baud. All hard disk type devices (IDE, PPIDE, CF Card, SD Card) will be automatically assigned two drive letters per device. The drive letters will refer to the first 2 slices of the device. The ASSIGN command can be used to display and reassign drives to disk devices and slices as desired. Standard ROM Image Notes ------------------------ The standard ROM images will detect and install support for certain devices and peripherals that are on-board or frequently used with each platform as documented below. If the device or peripheral is not detected at boot, the ROM will simply bypass support appropriately. SBC: - CPU speed is detected at startup - Includes support for PPIDE/CF Card(s) connected to on-board parallel port. - Includes support for CVDU and VGA3 boards. If detected at startup, support for video and keyboard is installed including VT-100/ANSI terminal emulation. - Auto-detects PropIO or PropIO V2 and installs associated video, keyboard and SD Card support if present. - If PropIO, PropIO V2, CVDU, or VGA hardware is detected, initial console output is determined by JP2. If JP2 is shorted, console will go to on-board serial port, if JP2 is open, console will go to the detected video and keyboard ports. - SBC V1 has a known race condition in the bank switching circuit which is likely to cause system instability. SBC V2 does not have this issue. ZETA/ZETA2: - CPU speed is detected at startup - Includes support for on-board floppy disk controller and two attached floppy disks. - Auto-detects ParPortProp and includes support for it if it is attached. - If ParPortProp is installed, initial console output is determined by JP1. If JP1 is shorted, console will go to on-board serial port, if JP1 is open, console will go to ParPortProp video and keyboard ports. N8: - CPU speed is detected at startup - Includes support for on-board floppy disk controller and two attached floppy disks. - Includes support for on-board TMS9918 video and keyboard including VT-100/ANSI terminal emulation. - Includes support for on-board SD Card as hard disk and assumes a production level N8 board (date code >= 2312). MK4: - CPU speed is detected at startup - Includes support for on-board IDE port (CF Card via adapter). - Includes support for on-board SD Card port. - Auto-detects PropIO or PropIO V2 and installs associated video, keyboard and SD Card support if present. - Includes support for CVDU and VGA3 boards. If detected at startup, support for video and keyboard is installed including VT-100/ANSI terminal emulation. RC2014: - Assumes CPU oscillator of 7.3728 MHz - Requires 512K RAM/ROM module - Auto detects Serial I/O Module (ACIA) and Dual Serial Module (SIO/2). Either one may be used. - Includes support for Compact Flash Module - Support for PPIDE Module may be enabled in config - Support for Scott Baker SIO board may be enabled in config - Support for Scott Baker floppy controllers (SMC & WDC) may be enabled in config RC2014 w/ Z180: - Assumes CPU oscillator of 18.432 MHz - Requires 512K RAM/ROM module - Console attached to Z180 onboard serial ports at 38400 baud - Includes support for Compact Flash Module - Support for PPIDE Module may be enabled in config - Support for alternative serial modules may be enabled in config - Support for Scott Baker floppy controllers (SMC & WDC) may be enabled in config EZZ80: - Assumes CPU oscillator of 10.000 MHz - Includes support for on-board SIO - Includes support for IDE via RC bus