| RS 128 |
/media/museum/photos/memotech_rs128_1.jpg |
/companies/memotech |
MEMOTECH |
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| label |
value |
| MANUFACTURER |
Memotech |
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value |
| TYPE |
Home Computer |
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value |
| ORIGIN |
United Kingdom |
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value |
| BUILT IN LANGUAGE |
MTX Basic, Noddy, Assembler |
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value |
| KEYBOARD |
Qwerty full-stroke keyboard, 79 keys. Numeric keypad. 8 function keys. |
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| label |
value |
| CPU |
Zilog Z80 A |
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value |
| CO-PROCESSOR |
TMS-9918A video chip from Texas Instruments. SN-76489A sound chip from Texas Instruments |
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value |
| RAM |
128 KB (up to 512 KB) |
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value |
| ROM |
24 KB (Basic + assembler) |
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value |
| TEXT MODES |
40 x 25 / 32 x 24 |
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value |
| GRAPHIC MODES |
four modes, maximum : 256 x 192 |
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value |
| COLORS |
16 maximum |
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value |
| SOUND |
3 voices / 6 octaves |
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value |
| I/O PORTS |
TV output, composite video output, 2 x joystick, Cardridge, Tape, Audio, Centronics, 2 x RS232, Bus |
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value |
| POWER SUPPLY |
External power supply unit |
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value |
| PERIPHERALS |
FDX floppy disk expansion system (with CP/M) |
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value |
| PRICE |
£399 (UK, october 1984) |
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| INSIDE THE RS-128 |
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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.
**(1)** 64 Kb RAM chips.\
**(2)** TV aerial signals modulator.\
**(3)** Three ROM circuits holding the Basic interpreter, Noddy and Z80 assembler languages.\
**(4)** This first expansion card adds 64 Kb RAM to the system, only usable as a virtual disk.\
**(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.\
**(6)** These two expansion cards are mainly devoted to the use of the CP/M operating system.\
**(7)** RGB video output connector for color monitor.\
**(8)** Video RAM (text & graphic) which allows main memory to be fully available for user programs and data.\
**(9)** Zilog Z80 microprocesseur running at 4 Mhz.\
**(10)** Two Atari compatible joystick connectors.\
**(11)** Tape-recorder connectors (In and Out). |
/media/museum/photos/memotech_rs128_inside1.jpg |
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subtitle |
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| FDX EXPANSION UNIT |
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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. |
/media/museum/hardware/memotech_fdx-expansion-unit_1.jpg |
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url |
text |
| MTX World |
http://www.mtxworld.dk/ |
Nice page with games, technical info, emulators, pictures, interviews, tips and more |
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| MTX TECHNICAL SPECIFICATION |
http://mtx.interactive.as/ |
/media/museum/docs/couvs/memotech_mtx-tech-sepc.jpg |
**MTX TECHNICAL SPECIFICATION**\
written by Memotech
compiled/archived by El Senator\
type of document : ZIP\
source : [MTX Series - the good old times](http://mtx.interactive.as/)
**... READ THE ONLINE VERSION BY CLICKING BELOW :** |
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| author |
date |
text |
| Roger Jowett (Ulster Londonderry) |
Saturday 6th April 2013 |
http://www.youtube.com/watch?v$zsjTpFR0oYQ
please help we have zx spectrum 48k and one 128k program running at 6mhz using external ram and snapper discs from velesoft site |
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| author |
date |
text |
| Roger Jowett (Ulster Londonderry) |
Saturday 6th April 2013 |
http://www.youtube.com/watch?v$zsjTpFR0oYQ
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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date |
text |
| Claus (Sweden) |
Friday 13rd July 2012 |
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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date |
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| Thomas |
Friday 24th June 2011 |
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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date |
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| Lez (England) |
Tuesday 21st June 2011 |
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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| /museum/memotech-mtx-500-512 |
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