Timex Sinclair 1500
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The TS1500 was a slightly-upgraded development of the Timex Sinclair TS1000. It replaced the earlier machine's ZX81-like case with a modified ZX Spectrum case and increased the onboard RAM to 16K. In spite of this, it was not a commercial success.
There are two little-known software differences between the TS1000 and TS1500.
On the TS1000 and ZX81, the command
LPRINT 0.00001 results in the Timex printer outputting 0.0XYZ1.
This well-known fault is corrected on the TS1500.
The TS1000 runs the following loop correctly but the TS1500 does not making one less iteration than it should.
10 FOR I = 0 TO 1 STEP .25 20 PRINT I 30 NEXT I
Peripherals
Timex Computer Corporation made an interface to use cartridge software with the TS1500. It was called the Timex Sinclair 1510 Command Cartridge Player.
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