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| IICMEM is a 8kB memory (EEPROM) connected to the AY-3-8912 chip, that works as I2C controller. Used as a "disk" under ZXVGS to store files. |
| 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. |
| TC1MB is a 1MB FLASH EPROM. Used under ZXVGS as mass memory (disk). |
| 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. |
| TC8255 parallel interface compatibile to the MB-02 one, DB37 slot. |
| TCAY68 is little fix that allows to acess the AY-3-8912 also as in ZX128. |
TCBLACK removes internal hardware
bug that causes grey color after PAPER 0: BRIGHT 1,
while in ZX Spectrum and TC2048 we get black.The solution is as factoryly mounted in TC2048. |
| TCDIN means exchange the monitor chinch socket to DIN545, what allows also sound in one place. |
| 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. |
| TF37 ia a cable that allows to connect Timex FDD 3000 as disk device to the parallel TC8255 interface (DB37). With the TIC cable also Amiga or PC can be attached. |
| 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. |
| Z80JOY is the Kempston Joystick interface mounted under Z80 chip. The extension board can be soldered over the Z80 chip. Or the Z80 chip can be desoldered, replaced with a GOLD socket, then interface goes into socket and the Z80 chip into it. As the output can be used one of original joystick slot or extra slot somewhere on the case. |
| ZXVGSUPB is a ZXVGS istallation. The original PROMs are removed and replaced with 64kB EPROM and 32kB SRAM. Requires mass memory device or cable connection for full functionality. |