| 2K Memory Upgrade |
Kit to increase the ZX81 to 2K. |
Sinclair ZX81 |
| CFASTDATA |
Provides all of the capabilities of CIOUTIL, but 6 times faster. Writes data to cassettes and reads data from cassettes at a speed which is 6 times faster than the TS1000/ZX81 SAVE and LOAD commands. |
Timex/Sinclair 1000 |
| CFASTDUET |
CFASTDATA and CFASTLOAD. When both programs are used, you may LOAD programs and data at a speed which is 6 times faster than the TS1000 and ZX81 LOAD and SAVE commands. CFASTLOAD can be configured to your needs. |
Timex/Sinclair 1000 |
| CIOUTIL |
Utility to selectively read and write strings and arrays to a cassette. Routines occupy approximately 500 bytes and require at least 2K RAM. |
Timex/Sinclair 1000 |
| Edge Connector |
Many vendors sold ZX80/ZX81/TS 1000 compatible edge connectors in solder-tail and wire-wrap versions. The wire-wrap connector could be used with a small printed circuit board to build a feed-through device that would allow for connecting another expansion unit. |
Timex/Sinclair 1000 |
| RS232/TTL Level Converter Plans |
Construct an RS232/TTL level converter from inexpensive components. This converter, when used with the Cosmonics TTL Serial Input/Output Port Package, allows connecting a TS1000 or ZX81 to most RS232C peripherals. |
Timex/Sinclair 1000 |
| Serial Input Port Plans |
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Timex/Sinclair 1000 |
| Serial Output Port Kit |
Plans and parts to build a serial output port using two integrated circuits. Plans also available separately. |
Timex/Sinclair 1000 |
| Software for Serial Input |
Provides RS232 input timing and ASCII to Sinclair character translation. |
Timex/Sinclair 1000 |
| Software for TTL Serial Output Port |
Provides correct RS232 timing and translation to ASCII. |
Timex/Sinclair 1000 |
| TTL Serial Input/Output Port Package |
Software and plans for building input and output ports which fit inside a ZX81 or TS1000. When used with an RS232/TTL level converter, can connect to most RS232C peripherals. |
Timex/Sinclair 1000 |
