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Dennis Gunia
2022-12-16 20:53:08 +01:00
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README.md
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# Z8C-Homebrew-Computer # Z8C-Homebrew-Computer
## Using the build tools # Using the build tools
The Z8C uses the zmac macro assembler (http://48k.ca/zmac.html) The Z8C uses the zmac macro assembler (http://48k.ca/zmac.html)
To easily develop for my Z80 homebrew system, I designed a simple To easily develop for my Z80 homebrew system, I designed a simple
@@ -11,13 +11,13 @@ assempler development environment. This packs the following tasks into one scrip
* symbol table include file generation * symbol table include file generation
* eeprom programming for the minipro * eeprom programming for the minipro
### Prequisites ## Prequisites
* zmac - self-compiled version included in ./Utility. * zmac - self-compiled version included in ./Utility.
* minipro (https://gitlab.com/DavidGriffith/minipro) * minipro (https://gitlab.com/DavidGriffith/minipro)
* binutils (apt-get install binutils-multiarch, * binutils (apt-get install binutils-multiarch,
pacman -S aarch64-linux-gnu-binutils ) pacman -S aarch64-linux-gnu-binutils )
### Building a project ## Building a project
`./build.sh <dir> <asm filename>` `./build.sh <dir> <asm filename>`
* `dir`: Path to the location of the asm file * `dir`: Path to the location of the asm file
* `asm filename`: name of the assembly file without suffix * `asm filename`: name of the assembly file without suffix
@@ -28,7 +28,7 @@ assempler development environment. This packs the following tasks into one scrip
./build.sh ../OperatingSystem/monitor_v2 ./build.sh ../OperatingSystem/monitor_v2
./build.sh ../OperatingSystem/software ./build.sh ../OperatingSystem/software
``` ```
### Building a project with a properties file ## Building a project with a properties file
`./build.sh <dir>` `./build.sh <dir>`
* `dir`: Path to the location of the asm file * `dir`: Path to the location of the asm file
@@ -45,7 +45,7 @@ export OPT_WRITEROM=1
export FILENAME=main export FILENAME=main
``` ```
#### Options ### Options
* `OPT_GEN_SYMBOLTABLE` if set to 1: Generates the symbols.s file * `OPT_GEN_SYMBOLTABLE` if set to 1: Generates the symbols.s file
* `OPT_GEN_MONFILE` if set to 1: Generates the monitor file * `OPT_GEN_MONFILE` if set to 1: Generates the monitor file
* `OPT_GEN_OBJFILE` if set to 1: Generates the object file * `OPT_GEN_OBJFILE` if set to 1: Generates the object file
@@ -55,11 +55,11 @@ export FILENAME=main
* `EEPROM_PART` sets EEPROM part for minipro. Default: `AT28C256` * `EEPROM_PART` sets EEPROM part for minipro. Default: `AT28C256`
## System design # System design
The Z80 Hombrew computer is modular computer system, designed arround a custom backplane. The Z80 Hombrew computer is modular computer system, designed arround a custom backplane.
### Available modules ## Available modules
#### Z8C CPU/COM Board ### Z8C CPU/COM Board
* Z80 ZPU @ 4MHz (6MHz planned) * Z80 ZPU @ 4MHz (6MHz planned)
* 64 KiB SRAM * 64 KiB SRAM
* 32 KiB EEPROM (R/W switchable) * 32 KiB EEPROM (R/W switchable)
@@ -81,9 +81,29 @@ $4000 +--------------------+--------------------+ |
| | | | | | | |
$FFFF +--------------------+--------------------+--------------------+ $FFFF +--------------------+--------------------+--------------------+
Note: In default mode and mode 1, the MEMAQ pin (pin a5 on backplane)
can be used to inject an external memory device in the $0000-$3FFF
window.
IO Addresses: IO Addresses:
$00 Memory register $00 Memory register
$01 DIP Switches $01 DIP Switches
$04 CTC (First address) $04 CTC (First address)
$08 SIO (First address) $08 SIO (First address)
``` ```
### Z8C MIO Board
* Z80 PIO (Used for GPIO and non Z80 compliant interrupt handling)
* VT82C42 PS/2 controller
* AM5911A (only usable with CPU-Clock under 3 MHz)
* PFC8584 I2C Controller
* DS1307 RTC
* 8-Bit GPIO Port
//TODO: Add more Info
### Z8C Disk Interface Board
* Intel 82C55 based IDE Interface
* FDC9266 Floppy Disk Controller
//TODO: Add more Info