/Vintage/Sinclair/80/Peripherals/Bi-Pak ZON X-81 Sound Module/

k1.spdns.de / Vintage / Sinclair / 80 / Peripherals / Bi-Pak ZON X-81 Sound Module /

ZON X-81 by BI-PAK

The ZON X-81 is a programmable Sound Generator for use with ZX81. Later Bi-Pak released an adapter board to connect it to the ZX Spectrum and even later then a modified version called ZON X which connected to a ZX81 and a ZX Spectrum alike.

It contains an AY-3-8912 three-channel sound chip with amplifier, loudspeaker and volume control in a 6in. x 3in. x 2in. box. Everything was powered from the computer.

As the device is I/O-mapped it requires machine code on the ZX81 but their REM-located sample machine code is simple and relocatable and thus can coexist with other REM-based machine code.

BI-PAK ZON X-81 used the AY chip

"Make amazing sounds with your Spectrum." 8 octaves, 3 channels with full control over pitch, volume, tones and noise, all with envelope control. Usable in your own Basic or M/C programs. Because this devices used the A4 address space, it is not compatible with the Interface 1 and Micrdrive. Because this was originaly a ZX81 interface, a small additional board is required. It sits between the ZON X and the Speccy, and contains a 3.5 Mhz oscillator to stabilise the frequency. Sinclair User Dec 83/Apr 83.

Tech info

This info is derived from scrutinising a ZON X interface (for ZX81 and Specci) and may be wrong in some details. If you find an error, please be kind enough to report it.

Sound chip              AY-3-8192
Clock cpu clock at bus connector pin /Clk ÷ 2
Decoded address lines: A0=1 to A3=1, A4=0, A7 selects function
Used i/o address: Select register: 0xCF
Write register: 0x0F
Read register: not possible.


Name Letzte Änderung Länge 
Bi-Pak ZON X Sound Module/ 2019-08-22 19:20 19 
Current Selling Prices/ 2019-08-20 05:24
XL/ 2019-08-20 05:24
ZON X-81 Manual (v.1) [Simon Holdsworth]/ 2020-08-27 14:08 26 
ZON X-81 Manual (v.2) [Kio]/ 2019-08-20 05:24 28 
Sinclair User 01300025 [WoS].jpg
size: 969 × 1343
2006-02-15 12:37 249913 
ZON X-81 Manual (text) [Ian Priddey].pdf 2007-07-27 16:26 162828 
ZON X-81 Manual (v.1) [Simon Holdsworth].pdf 2015-05-17 17:02 4321369 
ZON X-81 Manual (v.2) [Kio].pdf 2015-05-17 18:29 2182532 
ZON X-81.jpg
size: 600 × 450
2006-04-09 10:51 47339 
ZX Computing 821000035 [WoS].jpg
size: 969 × 1315
2006-02-15 12:35 262789 
ZX Computing 830400030 [WoS].jpg
size: 969 × 1269
2006-02-15 12:38 283325 

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