Firmware, SCM S5

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

Name	Small Computer Monitor
Configuration	S5
Release	2019-06-02
Download	SCM S5 2019-06-02
Device Programming:
Code size	32k bytes
Checksum (MiniPro 6.6)	07D6 357F
Recommended IC	SST39SF040
Core Components:
Monitor	Version 1.0.2
BIOS	Z180 native 1.0.1
Included Apps:
– ROM BASIC	Version 4.7b.1
– CP/M loader from CF card	Version 1.0

The firmware is supplied (above) as an Intel HEX format file, which is suitable for use by most PROM programmers. Intel HEX files are a text format, not a binary format. As a result they are larger than the stated code size in the table above.

The Small Computer Monitor’s Components and Apps are described here.

Source code can be found in the Small Computer Workshop download.

Supported Devices

• Z180 CPU (eg. Z8S180xx)
• Z180’s asynchronous serial ports
• Z180’s timer (for idle events)
• Digital I/O at 0x00
• Compact Flash at 0x10 for loading CP/M
• Status LEDs at 0x00

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

• Processor and memory:
  • SC111, Z180 Processor module

• Memory:
  • SC119, Z180 Memory module
  • Marten’s Z180 Linear Memory Module (not tested)

• Serial port:
  • SC111, Z180 Processor module

• Timer:
  • SC111, Z180 Processor module

• Baud rate generation:
  • SC111, Z180 Processor module

• CP/M storage:
  • RC2014, compact flash module
  • Karl’s #10, compact flash module (not tested)

• Self-test status display:
  • RC2014, digital I/O module

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 0x40 to 0x7F.

SCM assemble and disassemble commands only support official Z80 instructions, not the extended Z180 instruction set.