Data high, Clock high Idle state. First Z80 System by Thomas Scherrer. The emulator can load any of the formats supported by libspectrum (3) this includes Z80, SNA and SZX snapshots, and PZX, TAP and TZX virtual-tape files. It appears to the Z80 as four IO ports through which the keyboard, . Zilog Z8682PS Z8 ROMLESS - 1984 The Z8681 and Z8682 were the ROMLess versions (all program contents had to be stored off chip). Input and output are mainly through a serial link and a 162 LCD, but Joshua is already planning a keyboard interface and composite video output to give it that proper 1980s home computer vibe. After sorting the components I started with the usual sequence, i. - Interface for TASM Z80 assembler - Z80 Basic compiler with smart Basic source editor. Input and output are mainly through a serial link and a 162 LCD, but Joshua is already planning a keyboard. Selection of NTSC or PAL on the A-ONE delivers a rock solid picture. At the top of the page is the keyboard reading circuit. So the interface needs to be bi-directional. The PC will effectively provide the keyboard input and display output. Handling Z80 IORQ&x27;s (up to 256 unique read and write requests) handling background NMI&x27;s for the Z80, and copying the Z80 frame buffer RAM to the propeller for display; handling (triggering) periodical keyboard matrix scans and reads, converting them to key-press and key-release codes, plus handling the keyboard buffer. I saved as much block RAM on the FPGA as I could for future peripheral hardware. This is a Z80 -MBC2 emulator running on a TTGO ESP VGA32 board, an ESP32 device with a VGA connector, PS2 keyboard and mouse connectors, an audio output jack and a Micro-SD card connector. Euro 24. If we buffer them, we really need the means for the Z80 to indicate it has consumed a key and to move on to the next one. The location that the files are loaded into is dictated by the cpm. , LTD. 3728 Mhz. This element is basically an external expansion box, where you can add up to 5 cards. This is underway at the moment. 61-key portable keyboard is ideal for learning and performing. I would like to know if I could use an. 128KB Flash OS ROM (available as 8 16KB pages). It had no sound output. Figures 1-3 show the end results. In Stock. SIMPLE Z80 Computer Hey everyone Most recent update -> I completed the main 'brain' of the systemThis is my first time posting here on Instructables but I hope to do it regularly I have always been interested in computers and I hav. (New version 2. The CPUville Z80 Computer Serial Interface Kit is intended for use with the CPUville Z80 computer. CPU, keyboard interface, program RAM, reset. If the z80 is reading one of the input ports provided by the ASIC (e. If the Z80 wasn&39;t polling 100 of the time, it would miss keystrokes. If you have one you&x27;re willing to part with and are willing to take PayPal for payment, please let me know. Figures 1-3 show the end results. 77 MHz CPU inside keyboard Maximum of 16K RAM without the expansion interface, 48K with. 77 MHz CPU inside keyboard Maximum of 16K RAM without the expansion interface, 48K with. Here is the circuit board I made. The Z80 can&39;t directly bit-bang the keyboard lines. SD interfaces, Sound interfaces, IDE-Interfaces, keyboard interfaces and more. comdarrylsloanPAYPAL httpswww. 128KB Flash OS ROM (available as 8 16KB pages). A small Windows application, the serial port of the Arduino and the second interface of the DART emulate two harddisks with 8 Megabyte of capcity each. Ideal for any computer (such as my . Bottom view of prototype board, showing clock crystal and surface mount components. Z80 bootloader Boot the Z80 CPU from PC via LPT complete Docs and Software (Pascal). Citadines Connect Georgetown PenangOpening 19 December 2022. 6 1 General Documentation Other topics in this documentation Dictionary of core Forth words (dict. In this case it needs 4 port bits. I had a compact PS2 keyboard lying around (salvaged from one of my old laptop projects, actually) that I wanted to interface with the 2. UniSource MDA-Z80 8-Bit Micro-processor Trainer, MDAZ80 - on Sale at Test Equipment Depot. SDCC provides a small Z80-specific C library implementing things like printf, but device-specific code had to be written to implement putchar and getchar to interface with the Mailstation&x27;s custom LCD and keyboard. At the top of the page is the keyboard reading circuit. The last case indicates that this key code is unused by the keyboard. Yes, this guide is also helpful to recover, unroot or fix any software. System on chip, based on T80 core. The keyboard clock is between 10 kHz and 16. Retro Z80 Sinclair ZX Spectrum. The keyboard interface uses the same circuit I used in my old Z80 project. 1 Introduction. A magnifying glass. Combined with a keyboard interface these could replace the UART as the system console. txtPage 40) How to read the code (codeintro. 4 address lines A0 to A3 are sent to the keyboard and decoded into 16 lines by a 74LS154 (4-16 decoder) inside the keyboard case. Therefore we need something to deserialise and buffer scan codes. Ideal for any computer (such as my . uk in 2011 (not in 2019) an 8-bit IDE interface for a Z80. and then it worked. The Apollo challenges to be the very best at any price for professional recording. Thread starter suetonius; Start date Dec 11. Then came the correct character blink and border behavior. SIMPLE Z80 Computer Hey everyone Most recent update -> I completed the main 'brain' of the systemThis is my first time posting here on Instructables but I hope to do it regularly I have always been interested in computers and I hav. Tape. CPU, keyboard interface, program RAM, reset. There are a lot of FPGA-based projects to recreate old. 12864 pixel graphical monochrome LCD (PG12864LRS-ANN-H). Although not discussed in the official Z80 Users Manual, the 16-bit index registers IX and IY can be used as four individual eight-bit registers IXH, IXL, IYH, and IYL. If the Z80 wasn&39;t polling 100 of the time, it would miss keystrokes. 25 MHz, and was equipped with 1 KB of static RAM and 4 KB of read-only memory (ROM). The serial interface connects to the computer with. 77 MHz CPU inside keyboard Maximum of 16K RAM without the expansion interface, 48K with. CPM on a minimal Z80 Computer. Externally two drivers for the input signal, two resistors and two transistors, as shown, may be helpful. It is clocked at 3. Useful abbreviation as CTKI, or occasionally CKI (Chair-Keyboard Interface). UA have 60 years of audio knowledge and thousands of chart-topping record experience packed into their flagship rackmount X series. Parallel IO Chip The PIO chip provides two eight-bit bidirectional IO ports to interface with real world devices like keyboards, disk drives, display controllers, etc. Here is the Z80 itself All the signals from the Z80 were buffered because I worried that all the other circuits may drain too much current from the Z80. scanning routines and delivers an output to the Z80 on demand. based on the Zilog Z80 and including a keyboard and video interface, . Figures 1-3 show the end results. Finally, the 74LS02 was used along with control lines from the Z80 and the decoded output of the 74LS138 to create an interface to a HD44780 Parallel LCD. wales<a><p> <body>. This article describes setup and test of a Z80-SBC - the Z80-MBC2, which creates, together with the uTerm-PCB a complete CPM-Computer. 1k 804 62. The Big Board (1980) and Big Board II (1982) were Z80 based single-board computers designed by Jim Ferguson. Internal I 2 C bus. Two PS2 ports for keyboard and mouse. with Z80. This keyboard interface is identical in principle to that of the ZX Spectrum, except the job of the ULA is handled by the 8bit buffer. Scanned keyboard mode 2. These blocks provide the electrical interface between the Z80 and the 8255. CPM on a minimal Z80 Computer. CPM on a minimal Z80 Computer. Zilog Z8682PS Z8 ROMLESS - 1984 The Z8681 and Z8682 were the ROMLess versions (all program contents had to be stored. Here is the Z80 itself All the signals from the Z80 were buffered because I worried that all the other circuits may drain too much current from the Z80. 128KB Flash OS ROM (available as 8 16KB pages). Carte Z80 PIO pour Sinclair ZX81 - Interface parallle. 0xED (SetReset LEDs) - The host follows this command with one argument byte, that specifies the state of the keyboard&39;s Num Lock, Caps Lock, and Scroll. I use the software scanned keyboard built into my monitor,. 128KB Flash OS ROM (available as 8 16KB pages). This has actually connected ram as well as the bq4845 real time clock chip and 8042 keyboard controller. Today, there are still hand keys and bugs in use, but they are in the minority. CPM on a minimal Z80 Computer. Once assembled, you can use the keyboard and display of a PC, or a dumb terminal, to communicate with the Z80 computer using text input and output. Re Getting a Verilog PS2 interface working. z80 cpu user manual do not use this product in life support systems. A complete kit. Z80 CPU Controller Project Z80 based control unit primarily designed for operating and monitoring various aspects of home life. 12864 pixel graphical monochrome LCD (PG12864LRS-ANN-H). 03) Many years ago when I was programming the Z80 professionally and at home, tools were very expensive. For every problem we will add a board that has the cure. bin files are loaded into memory Core - A bunch of core routines, for leds, disks etc BIOS - A stub of a BIOS BDOS - The main part of CPM CCP - The interface of CPM. The 11. based on the Zilog Z80 and including a keyboard and video interface, . This provides access to the full Z80 bus, and power. In the image, black line symbolizes logic 0 and red line symbolizes logic 1. Combined with a few dozen other resources of Z80 info on line I&x27;ve been able to at least get the basics assembly language programming. Note 1980s date codes FIGURE 2. txtPage 40) How to read the code (codeintro. Two PS2 ports for keyboard and mouse. I have included the 16-Bit IDE interface and have renamed this card to Multi-Card. Input and output are mainly through a serial link and a 162 LCD, but Joshua is already planning a keyboard. 5 mai 2021. Externally two drivers for the input signal, two resistors and two transistors, as shown, may be helpful. citation needed. FIGURE 1. The z80 is built and working properly, and the cassette interface is built but not quite working properly. 0592MHz gives baud rates within 0. 1k 804 62. Current Hardware Specifications 10MHz Z80 CPU running at 2MHz. First Z80 System by Thomas Scherrer. 64KB RAM (32KB always-available user memory, 16KB OS memory switchable for 16KB extra user memory). Ione Lynx-M9 mouse. In order to test the chipinterface a Z80 program was written called SPIRTC. Figures 1-3 show the end results. 8 data lines return from the keyboard matrix and are read back from the keyboard using the OUT2 signal. It uses a 6MHz Mitsubishi 8049 - this is a 100 clone of the Intel part, with the same three clocks per S-cycle, and five S-cycles per machine cycle, giving a machine cycle time of 2. The data bus buffer buffers the data IO lines tofrom the Z80 data bus. Touch-sensitive keyboard allows 48-note polyphony for rich, vibrant sound. MultiComp can re-create an 8-bit 6502, 6809, or Z80 microcomputer system from the 1970s era, including multiple serial interfaces, a PS2 keyboard interface, various types of video out, plenty of RAM memory, and lots of permanent storage on an SD or &181;SD card. Programming L ab Book contains 12 different labs. Input and output are mainly through a serial link and a 162 LCD, but Joshua is already planning a keyboard. Re Getting a Verilog PS2 interface working. The Z80 can&x27;t directly bit-bang the keyboard lines. connection is serial and i might use an interface ic such as 8255. Input and output are mainly through a serial link and a 162 LCD, but Joshua is already planning a keyboard interface and composite video output to give it that proper 1980s home computer vibe. For every problem we will add a board that has the cure. The PC will effectively provide the keyboard input and display output. In order to test the chipinterface a Z80 program was written called SPIRTC. It has inbuilt debounce key. First Z80 System by Thomas Scherrer. Z80 bootloader Boot the Z80 CPU from PC via LPT complete Docs and Software (Pascal). Zilog Z80-compatible running at 3. 40 pin expansion header. SC108 Z80 CPU Memory (RAMROM) SC110 SIO2 CTC. connecting the FTDI with the pins of the serial interface on the uTerm. The PC will effectively provide the keyboard input and display output. GSM Agent A software program installed on each GIGABYTE server node that retrieves . and then it worked. The code uses the onboard timercounter. The compact flash card interface is exactly the same as normal except instead of using 16-bits of data the card exchanges 8-bits of data at a time. From Wikipedia by user Morn CCA 2. Z80 SRAM This page shows how it is possible to connect a SRAM and an EPROM in series () for a Z80 processor system. Before I made a single board Z80 based computer but this time I made much smarter one It is based on composite-Z80, contains SIO, PIO, CTC, CGC and basicall. rk; rz. The Nascom 1 and 2 were single-board computer kits issued in the United Kingdom in 1977 and. 44-LCC (J-Lead) 44-PLCC. Here is the circuit board I made. (various makers) Z80 clock Tynemouth Software. This also works for AVR. de> COPYING. 2021 Hackaday Prize. The ZX81 AT-Keyboard Interface works with a normal PC-AT keyboard. Z80 keyboard interface. The Chloe Corporation aims to take 8080 and Z80 users into the 16-bit era with the new Chloe 280SE. Specs - Z80 CPU -32K EEPROM (0x0000 - 0x7FFF), Can be disabled for full SRAM memory space -64K SRAM (0x0000 - 0xFFFF) -16550 UART Controller -Counter Timer Chip (CTC) -Parallel IO Chip (PIO) -Parallax Propeller to allow for extra peripherals -SD Card -VGA -PS2 Keyboard -5V Power Via USB (Z80 Only) -Regulated power via wall jack. Device interface USB, Keyboard key switch Mechanical, Keyboard layout QWERTY. The CPU bus inter face logic allows the PlO to interface directly to the Z8O-CPU with no other external Logic. 12864 pixel graphical monochrome LCD (PG12864LRS-ANN-H). The Z80 BIOS provides access to the SD card reader via the ATMEGA microcontroller. I built a homebrew Z80 based 8 bit computer for Retro Challenge back in 2014 (hence the name RC2014). 15,50 EUR. Ana Sayfa. Internally, the machine was designed by Jim Westwood around a Z80 central processing unit with a clock speed of 3. In fact MS-DOS was initially a port of CPM to the 8086 CPU used in the original IBM PC. I was using the LD instruction to interface to the 8255. by Jenny List. I have built Grant Searle&x27;s Z80 sbc including the serial and keyboard interface. So the interface needs to be bi. It is 4X4 KEY BOARD Touch Screen that uses MCU No. So, I gritted my teeth and taught myself Z80 assembly language. z80 keyboard interface keyboard replacements are available from RWAP software. 2 PCIE SSD, 16inch QHD 165Hz Touch Screen, GeForce RTX 3060, WiFi 6E, BT 5. Interface with serial external devices Z80-PIO, structure and programming, 2 bidirectional. The computer has connectors for an optional serial interface to allow loading programs from a PC. Sharkoon SKILLER SGB30. 4 8-bit 74LS256 bus tranceivers. CPM on a minimal Z80 Computer. Level II BASIC, capable of loading in data and programs off cassette at a (then) blistering 500 bits per. It is clocked at 3. Go back to seventies and eighties of the last century and experience the dawn of the consumer computer age with this retrocomputerkit. I have several matched sets of Z80 CPU and peripheral chips that I. Power for the Z80 part of the circuit is now supplied by the STM32 via the USB port. Joshua is already planning a keyboard interface and composite. Schematics, PCB-Layout, etc for a small Z80 system by Mario Prato. They were used to interface to the SIO chip of Z80 terminals CPM computers. CPM on a minimal Z80 Computer. Im working on a project where I will interface with some shift registers (74HC595&x27;s), and with an apparent lack of any SPI peripheral chips available and not wanting to "cheat" with a. 12864 pixel graphical monochrome LCD (PG12864LRS-ANN-H). But it's fairly straigthforward, Z80 pins are either connected - to arduino 5V output - to arduino GND - to any arduino digital pin I have chosen (ie clk is connected to pin 53, and the arduino sketch sets the 53 pin down, up 100 ms latter, then again up 900 ms latter, to get a 1. Re Getting a Verilog PS2 interface working. In Stock. Students engage in a comprehensive learning environment, encouraging years of progress and successful playing. Keyboard Kitaplar Filmler Mzikler. 10MHz Z80 CPU running at 2MHz. Two PS2 ports for keyboard and mouse. So the interface needs to be bi-directional. Retro Z80 Sinclair ZX Spectrum. Once assembled, you can use the keyboard and display of a PC, or a dumb terminal, to communicate with the Z80 computer using text input and output. Next in column 5 follows a printable character (Ascii code > 32) and a Space or in column 5 and 6 are two hexadecimal digits or columns 5 and 6 contain both a Space. Bringing up an initial S100 bus system for beginners is often not easy. SCM Z80 Assembler on ROM. Finally, the 74LS02 was used along with control lines from the Z80 and the decoded output of the 74LS138 to create an interface to a HD44780 Parallel LCD. A computer keyboard is a device used to provide alphanumeric input. Hi, I'd like to interface a Z80 cpu to a monochrome LCD display through a dual port sram. Choose a language. I would like to know if I could use an. Plug and PlayThe mini mechanical keyboard with custom functions is designed with a Type C to USB interface, no driver required, plug and play, convenient and fast. british shorthair ny11 price, enterprise car sells
PIO include most keyboards, paper tape readers and punches, printers, and. . Z80 keyboard interface
Freeware Z80 microprocessor IDE. The Apollo challenges to be the very best at any price for professional recording. Manual PDF format. Z80 Monitor Type Operating System and SBC EfexV4 is a monitor ROM with inline assembler and disassembler andbasic utilities to write, run and debug your z80 programs in real hardwareEfexMon do not needs CPM, N8VEM or other complicated hardware. Debug functions are also available via PC or system keypad interface. The data bus buffer buffers the data IO lines tofrom the Z80 data bus. The Z80 address lines are output only, and no voltage should ever be presented to it. Build Your Own Z80 Computer Design Guidelines and. Internally, the machine was designed by Jim Westwood around a Z80 central processing unit with a clock speed of 3. sv, which translates the keycode into an ASCII char and passes that out via an 8-bit parallel bus to the Z80 interface. Schematic images of the computer system and the keyboard interface are here Standalone Z80 computer schematic PS-2 keyboard interface schematic The video display. uk in 2011 (not in 2019) an 8-bit IDE interface for a Z80. Several of the ideas for the RDT64 came from the first computer I built, a digital group Z80 and its TVC-64 video card. RC2014 PS2 keyboard interface. At the top of the page is the keyboard reading circuit. , LTD. In this tutorial youre going to learn how to create a web server with the ESP32 to display readings from the BME280 sensor module. 8 data lines return from the keyboard matrix and are read back from the keyboard using the OUT2 signal. Z80 microprocessor book is intended for microprocessor courses at the undergraduate level in technology, engineering, and computer science. SD interfaces, Sound interfaces, IDE-Interfaces, keyboard interfaces and more. It indicates, "Click to perform a search". the keyboard port) then it is possible for a device attached to the expansion port to override the value provided by the ASIC. SCM Z80 Assembler on ROM. The 49 mini keys immediately draws comparison with the Yamaha PortaSound keyboards of the era, and it features 8 voice polyphony, 10 sounds, 28 rhythms, vibrato and sustain buttons (no pedal input), auto harmony, the appalling and badly-named playright mode, cheap speakers, the. Z80 bootloader Boot the Z80 CPU from PC via LPT complete Docs and Software (Pascal). At the top of the page is the keyboard reading circuit. z80 keyboard interface keyboard replacements are available from RWAP software. Dec 19, 2017. I have included a PDF of the main board schematic. Z80 CPU running at 1. 4 8-bit 74LS256 bus tranceivers. Pricing and Availability on millions of electronic components from Digi-Key Electronics. CTKI is the tech-tarded USER that TECHS spend so much company time dealing with that could be better spent on more important network issues. Schematic images of the computer system and the keyboard interface are here Standalone Z80 computer schematic PS-2 keyboard interface schematic The video display. ATAIDE interface and driver source code. The Z80 can&x27;t directly bit-bang the keyboard lines. Customize your work area and create the workflow you need. MMD File System with SD card interface. The Replica 1 has a EEPROM, the A-ONE an oldfashioned EPROM. Current Hardware Specifications 10MHz Z80 CPU running at 2MHz. Kim tra b g ting vit. DOT MATRIX Experiment 11. If we buffer them, we really need the means for the Z80 to indicate it has consumed a key and to move on to the next one. This provides access to the full Z80 bus, and power. It indicates, "Click to perform a search". I a currently expanding a Z80 SBC based on Grant Searle's Z80 CPM SBC. The base Z80 Membership Card contains a Z80 processor, 32k SRAM, and 32k EPROM, along with the necessary components to get them all working together. 2021 Hackaday Prize. Building the RS-232 serial interface , with details on programming , troubleshooting and driver source code. The 8255 PPI is a general purpose parallel interface device configured as three. Because the creators of these designs are busy, I figured I&x27;d jump into an online community to see if I could get any. It indicates, "Click to perform a search". uTerm can be mounted horizontally or vertically to the Z80-MBC2. The internal path being enabled depends on the type of operation performed by the Z80. Home of the Z80 Playground. KEYBOARD AND HOST UART. Two PS2 ports for keyboard and mouse. Now we&39;ll look at the code needed to drive a serial circuit. Z80 keyboard interface hj qc ej The base Z80Membership Card contains a Z80processor, 32k SRAM, and 32k EPROM, along with the necessary components to get them all working together. At the top of the page is the keyboard reading circuit. sv, which translates the keycode into an ASCII char and passes that out via an 8-bit parallel bus to the Z80 interface. ORG 2000. txtPage 40) Programming AVR chips (avr. If the z80 is reading one of the input ports provided by the ASIC (e. Level I BASIC, which fit entirely within 4K of ROM, capable of loading in data and programs off cassette at 250 bits per second. 2021 Hackaday Prize. After that the keyboard interface, speaker, mic - all fairly simple modules. Finally, the 74LS02 was used along with control lines from the Z80 and the decoded output of the 74LS138 to create an interface to a HD44780 Parallel LCD. Pricing and Availability on millions of electronic components from Digi-Key Electronics. Graphics library (v2. Z80 CPU Controller Project Z80 based control unit primarily designed for operating and monitoring various aspects of home life. It was minimal compared to operating systems like Unix or OSX (or even Windows). NASCOM 8K BASIC can be loaded from the SD card but my preference is the superior Z80 version of BBC BASIC, which was created using a series of source files kindly provided by the author. First Z80 System by Thomas Scherrer. Backlight type RGB LED. (C) par S. - Port B provides a command interface so the AVR can send low level commands to the bus monitor hardware (like Step) - Port D provides a status interface, so the AVR can read back status from the bus monitor hardware, and also control the "mux port" - Port E is the mux port which allows the AVR to snoop the value of the processor registers. It indicates, "Click to perform a search". Article code KIT111. The Mark 8 is an 8008 based computer that was designed and published in Radio Electronics magazine. One is a latchinterface board. 5 of recommended tolerances for every baud rate up to 230400. 0xEE (Echo) - The keyboard responds with "Echo" (0xEE). NASCOM 8K BASIC can be loaded from the SD card but my preference is the superior Z80 version of BBC BASIC, which was created using a series of source files kindly provided by the author. This will allow us to use our PC running terminal emulation software like Tera Term to access our system. Bringing up an initial S100 bus system for beginners is often not easy. Note 1980s date codes FIGURE 2. MMD File System with SD card interface. The Zxkey matrix keyboard interface I did can handle up to 8x8 matrix keypads so the 99cent Chinese hex pads work fine and the MG001 board is a 4 x 7 segment LED driver board for the other. Go back to seventies and eighties of the last century and experience the dawn of the consumer computer age with this retrocomputerkit. A magnifying glass. It indicates, "Click to perform a search". The Z8611 was for mass production (with a 4K Mask ROM), the Z8612 was a 64 pin package with an externa memory interface, and the Z8613 was again, a Protopack. Schematics, PCB-Layout, etc for a small Z80 system by Mario Prato. 2021 Hackaday Prize. The project creates a Z80 computer which provides the possibility of producing a video board that utilizes TV as the monitor. Current Hardware Specifications 10MHz Z80 CPU running at 2MHz. A Keyboard Interface For Your SInclair ZX. NACODEX Mini 60 Mechanical Gaming Keyboard - PBT Pudding Keycap Bluetooth 5. 16x2 LCD means that there are two rows in which 16 characters can be displayed per line, and each character takes 5X7 matrix space on LCD. 1 Introduction. I would like to know if I could use an. false false VIN GND D13 D12 D14 D27 D26 D25 D33 D32 D35 D34 VN VP EN 3V3 GND D15 D2 D4 RX2 TX2 D5. The Z80 CPU was connected to the 8255 PPI, 74LS244, 74LS374 and 74LS02 via the 74LS138. I saved as much block RAM on the FPGA as I could for future peripheral hardware. RC2014 PS2 keyboard interface. The N8VEM home brew computing project has 7 PCBs available right now; the SBC, the ECB backplane, the ECB bus monitor, the ECB prototyping board, the DiskIO board (IDE & FDC), Zilog Peripherals (timer, dual serial, quad parallel), and 6809 host processor board. The 4 address lines A0-3 go directly to the keyboard and are decoded by a 74LS154 4-16 line. I have it programmed . CPM on a minimal Z80 Computer. 6 pin FTDI compatible header. It was minimal compared to operating systems like Unix or OSX (or even Windows). It had no sound output. FIGURE 1. Maybe my "more modern" PS2-keyboard I tried initially, has. . shaquille married at first sight instagram