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Timex 2000 series: Difference between revisions
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Clarify RGB / YUV on expansion bus
(Clarify RGB / YUV on expansion bus) |
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* The TC2068 is the Portuguese made European version operating at 50Hz on a 230–240v power supply and generates a PAL television signal (used throughout Europe, except in France where SECAM is used instead) with a normal expansion bus. Both machines feature an [[AY-3-8912]] sound chip (not 128 compatible), an extended version of BASIC in 24K of ROM (semi-compatible), two non-standard joystick ports, a cartridge dock (not IF2 compatible), and a new ULA with extra video modes, but some incompatiblities. There is also a Polish clone of the TC2068, called the UK2086, which substitutes an RS232 port for one of the joystick ports. | * The TC2068 is the Portuguese made European version operating at 50Hz on a 230–240v power supply and generates a PAL television signal (used throughout Europe, except in France where SECAM is used instead) with a normal expansion bus. Both machines feature an [[AY-3-8912]] sound chip (not 128 compatible), an extended version of BASIC in 24K of ROM (semi-compatible), two non-standard joystick ports, a cartridge dock (not IF2 compatible), and a new ULA with extra video modes, but some incompatiblities. There is also a Polish clone of the TC2068, called the UK2086, which substitutes an RS232 port for one of the joystick ports. | ||
* The TC2048 was designed and produced in Portugal. Basically, the TC2048 is a TC2068 with all the extra hardware removed, except the new ULA, but a normal BASIC ROM (only slightly modified), an RCA phono composite out | * The TC2048 was designed and produced in Portugal. Basically, the TC2048 is a TC2068 with all the extra hardware removed, except the new ULA, but a normal BASIC ROM (only slightly modified), an RCA phono composite out, and a [[Kempston joystick interface|Kempston]] joystick port (but no +5v as needed by autofire joysticks). | ||
* The TS2068 is an American machine operating at 60Hz on a 110v power supply and generates an NTSC television picture (just like the Spectrums sold by mail order in the US by Sinclair) but with a [[Timex TS1000|TS1000]] (ZX81) compatible expansion bus. | * The TS2068 is an American machine operating at 60Hz on a 110v power supply and generates an NTSC television picture (just like the Spectrums sold by mail order in the US by Sinclair) but with a [[Timex TS1000|TS1000]] (ZX81) compatible expansion bus. | ||
* The TC2068 and TS2068 have RGB signals on their expansion bus. The TC2048 lacks these signals. | |||
There are also two modified versions of the TC2048; the TC2128 (Rebuiltion or similar) and the TC2144 (by Jarek Adamski). The TC2128 extends the TC2048 to 128K using the [[ZX Spectrum+ 128K]] memory scheme. The TC2144 does the same but provides an extra 16K of memory between 0x8000 and 0xc000. Both upgrades allow the ULA to use the shadow screen in Bank 7 giving the machine a total of four screen areas. | There are also two modified versions of the TC2048; the TC2128 (Rebuiltion or similar) and the TC2144 (by Jarek Adamski). The TC2128 extends the TC2048 to 128K using the [[ZX Spectrum+ 128K]] memory scheme. The TC2144 does the same but provides an extra 16K of memory between 0x8000 and 0xc000. Both upgrades allow the ULA to use the shadow screen in Bank 7 giving the machine a total of four screen areas. | ||