| IM2FIX removes hardware bug that causes screen noise when IM 2 is selected and I register contains value range #40..#7F. The noise usually appears in demos from East. IM2FIX is build-in into memory extension TC2144. |
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| TC2144 is a memory extension to 144kB RAM and 32kB ROM, compatibile to ZX128. Extension includes also interrupt fix IM2FIX and the TR-DOS calls trap - TRETRAP. |
| TCAY48 is a little board that allows to connect the AY-3-8912 inside the computer. |
| TCDIN means exchange the monitor chinch socket to DIN545, what allows also sound in one place. |
| TCJOY means polarisation exchange of Kempston Joystick port, what increases its functionality. |
| TCLED - double color LED that shows, whether the machine is on (green) or the power supply unit is connected (red). Also unloads capacitors in power supply unit. |
| TI-of-TTL is a Timex Interface M-397 replacer, build from TTL chips only. Apart from TOS (upgraded to work with ZX128, too) in the extended memory there is ZXVGS and also keyboard test code. |
| TR-DOS traps are needed to run TR-DOS software under ZXVGS. |
| YABUS.ZXAT - AT286 main board connected as extension. |