Difference between revisions of "Amdrum"
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− | |74LS30N||Single 8-input NAND||Port decoding | + | |74LS30N||Single 8-input NAND||Port decoding, /ADDR_MATCH=LOW when A8..A15 all HIGH |
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− | |74LS32N||Quad 2-input OR||Port decoding | + | |74LS32N||Quad 2-input OR||Port decoding, /DAC_WRITE when /ADDR_MATCH, /IORQ, /WR all LOW |
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|SN74LS04N||Hex Inverters||? | |SN74LS04N||Hex Inverters||? |
Revision as of 07:27, 13 January 2010
A drumkit by the British company Cheetah.
The drumkit was able to play 8bit sound samples.
Quality of the playback was nice, considering the time and price.
The samples was read from the suplied tapes.
There was serveral tapes with different themes!.
Along with the Amdrum came a sequencing program.
It was possible to copy the samples to disc, but the sequencing program had to be patched!
Amdrum was probably Cheetahs version of the SpecDrum (As revealed on the PCB "AMSTRAD SPECDRUM")
No CPC emulator supports the Amdrum. To hear 'Amdrum' in action the Spectrum emulator Spectaculator emulates the SpecDrum.
No other software than Cheetahs own sequencer is know to use the Amdrum.
Contents
Technical Specifications
The PCB(oneside) contains five chips:
74LS30N | Single 8-input NAND | Port decoding, /ADDR_MATCH=LOW when A8..A15 all HIGH |
74LS32N | Quad 2-input OR | Port decoding, /DAC_WRITE when /ADDR_MATCH, /IORQ, /WR all LOW |
SN74LS04N | Hex Inverters | ? |
064C0P | Amplifier? | |
Ferranti ZN428E-8 | 8bit DAC |
The Amdrum probably uses port #FF50 I/O, needs to be confirmed though.
Kits
Afro Kit Covertape
Electro Kit Covertape
Latin Kit Covertape
Tapes
Amdrum Tape
Afro Kit Tape
Electro Kit Tape
Latin Kit Tape
Pictures
Manual
- Amdrum Manual (pdf)
Reviews / Commercials
Review of the Amdrum in Amstrad Computer User
Weblinks
Review of the Spectrum version
Other playback devices
- Digiblaster (DIY) (8bit DAC on printer port)
- Music Machine
Videos
A presentation(from around 1985) of the ZX Spectrum version of the Amdrum(Specdrum), also mention of the upcomming Amstrad CPC version
{{#ev:youtube|m6R_W9CZWGU|200}}
Download
- Amdrum.zip (CDT for Emulators)
- Amdrum Afro Kit.zip (CDT for Emulators)
- Amdrum Electro Kit.zip (CDT for Emulators)
- Amdrum Latin Kit.zip (CDT for Emulators)