yann64andClaude Opus 5.5
c913d792c4
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
152 lines
6.7 KiB
Markdown
152 lines
6.7 KiB
Markdown
---
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title: MEMOTECH RS 128
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categories:
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- Computers
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types:
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- Home Computer
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origins:
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- United Kingdom
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years:
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- '1984'
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cpus:
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- Zilog Z80 A
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params:
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name: RS 128
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image: /media/museum/photos/memotech_rs128_1.jpg
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company: /companies/memotech
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company_name: MEMOTECH
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specs:
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- label: NAME
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value: RS 128
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- label: MANUFACTURER
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value: Memotech
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- label: TYPE
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value: Home Computer
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- label: ORIGIN
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value: United Kingdom
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- label: YEAR
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value: '1984'
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- label: BUILT IN LANGUAGE
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value: MTX Basic, Noddy, Assembler
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- label: KEYBOARD
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value: Qwerty full-stroke keyboard, 79 keys. Numeric keypad. 8 function keys.
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- label: CPU
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value: Zilog Z80 A
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- label: SPEED
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value: 4 MHz
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- label: CO-PROCESSOR
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value: TMS-9918A video chip from Texas Instruments. SN-76489A sound chip from Texas Instruments
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- label: RAM
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value: 128 KB (up to 512 KB)
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- label: VRAM
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value: 16 KB
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- label: ROM
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value: 24 KB (Basic + assembler)
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- label: TEXT MODES
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value: 40 x 25 / 32 x 24
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- label: GRAPHIC MODES
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value: 'four modes, maximum : 256 x 192'
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- label: COLORS
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value: 16 maximum
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- label: SOUND
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value: 3 voices / 6 octaves
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- label: I/O PORTS
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value: TV output, composite video output, 2 x joystick, Cardridge, Tape, Audio, Centronics, 2 x RS232, Bus
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- label: POWER SUPPLY
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value: External power supply unit
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- label: PERIPHERALS
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value: FDX floppy disk expansion system (with CP/M)
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- label: PRICE
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value: £399 (UK, october 1984)
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tabs:
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- photos
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- hardware
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- links
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- docs
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photos:
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- title: INSIDE THE RS-128
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subtitle: ''
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text: |-
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The RS-128 is technically identical to the <$168$>MTX 512. The only innovation is the addition of 2 cards (64 Kb RAM and serial interface) proposed as optional addons for the previous models.
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**(1)** 64 Kb RAM chips.\
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**(2)** TV aerial signals modulator.\
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**(3)** Three ROM circuits holding the Basic interpreter, Noddy and Z80 assembler languages.\
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**(4)** This first expansion card adds 64 Kb RAM to the system, only usable as a virtual disk.\
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**(5)** The second expansion card offers two RS-232 serial ports. One of them can be used to connect the FDX 5.25" double disk-drive unit.\
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**(6)** These two expansion cards are mainly devoted to the use of the CP/M operating system.\
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**(7)** RGB video output connector for color monitor.\
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**(8)** Video RAM (text & graphic) which allows main memory to be fully available for user programs and data.\
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**(9)** Zilog Z80 microprocesseur running at 4 Mhz.\
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**(10)** Two Atari compatible joystick connectors.\
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**(11)** Tape-recorder connectors (In and Out).
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image: /media/museum/photos/memotech_rs128_inside1.jpg
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hardware:
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- title: FDX EXPANSION UNIT
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subtitle: ''
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text: 'MTX double 5'''' diskette drive unit allows the Memotech computers to reach the significant softwares library of the CP/M operating system. Diskettes drives are double face, double density versions, with a 500 Kb. storage capacity. Data transfer uses the computer''s serial port. It''s very slow : 9600 bauds (1200 bytes/sec.). A 80 columns card is supplied inside the case to ensure compatibility with CP/M display mode. Several software are delivered with this unit, of which word processing New Word, the SuperCalc spreadsheet and several utilities.'
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image: /media/museum/hardware/memotech_fdx-expansion-unit_1.jpg
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links:
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- title: http://www.atarimagazines.com
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url: http://www.atarimagazines.com/creative/v10n6/48_Memotech_MTX512.php
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text: Memotech MTX-512 evaluation from Creative Computing, John J. Anderson.
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- title: MTX World
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url: http://www.mtxworld.dk/
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text: Nice page with games, technical info, emulators, pictures, interviews, tips and more
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- title: MTXinfo.de
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url: http://www.mtxinfo.de/
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text: some text in German, content mostly in English
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- title: Wikipedia dedicated page
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url: http://en.wikipedia.org/wiki/Memotech_MTX
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text: ''
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docs:
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- title: MTX TECHNICAL SPECIFICATION
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url: http://mtx.interactive.as/
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cover: /media/museum/docs/couvs/memotech_mtx-tech-sepc.jpg
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text: |-
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**MTX TECHNICAL SPECIFICATION**\
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written by Memotech
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compiled/archived by El Senator\
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type of document : ZIP\
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source : [MTX Series - the good old times](http://mtx.interactive.as/)
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**... READ THE ONLINE VERSION BY CLICKING BELOW :**
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comments:
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- author: Roger Jowett (Ulster Londonderry)
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date: Saturday 6th April 2013
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text: |-
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http://www.youtube.com/watch?v$zsjTpFR0oYQ
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please help we have zx spectrum 48k and one 128k program running at 6mhz using external ram and snapper discs from velesoft site
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- author: Roger Jowett (Ulster Londonderry)
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date: Saturday 6th April 2013
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text: |-
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http://www.youtube.com/watch?v$zsjTpFR0oYQ
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please help we have zx spectrum 48k and one 128k program running at 6mhz using external ram and snapper discs from velesoft site
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- author: Claus (Sweden)
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date: Friday 13rd July 2012
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text: Hmmm, is said same Sound and VDP as MSX, i dont think so. Memotech use a Texas Soundprocessor, wich is equal to Colecovision and Sega SC-1000 console. But not compatible with MSX, sound data can by the way be converted, but is not compatible. I know this since i have been converted a few MSX games to Memotech, read more at www.mtxworld.dk
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- author: Thomas
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date: Friday 24th June 2011
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text: Does anyone know which CHIP was used to give the 80 column display on the RS128... ?? If so please leave a comment
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- author: Lez (England)
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date: Tuesday 21st June 2011
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text: The RS128 had a second video processor giving a color 80 column display. It also had a ROM board for adding Roms and RS232 ports. But basically it was an MTX512.
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related:
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- /museum/memotech-mtx-500-512
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oc_id: 202
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source:
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url: https://web.archive.org/web/20230205013511/http://www.old-computers.com/museum/computer.asp?c=202
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date: '2023-02-05'
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---
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The Memotech RS128 is the successor of the [Memotech MTX 512](/museum/memotech-mtx-500-512/). It looks like the MTX 512 and has almost the same characteristics.
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Like the MTX 512, it sports an aluminum case. Contrary to the MTX, it has RS-232 built-in interfaces, primarily used to connect the FDX floppy drive (the data are sent from the disk to the RAM at a whopping 9600 baud!). The FDX unit comes with a 80 columns card and allows the RS128 to run CP/M programs.\
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It was supplied with NewWord (word processor) and SuperCalc (spreadsheet).\
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Only the lower 64 KB can be used, the upper 64 KB are used as a RAM disk.
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Similar the MTX512, the RS128 has characteristics very near of the [MSX computers](/museum/msx-1/) (same sound chip & video for example) but wasn't able to use MSX software.
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