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This is not easy reading for me, but seems like a whole tele text screen can be fitted per frame.dr beep wrote:How often could you 'refresh' the content of the page.
If frequently you can indeed use the settings of teletext as a screen and resolution.
Err... the need of a change to the ZX81 almost beats the purpose.PokeMon wrote:Second a bit has a duration of 144ns vs. 154ns with the 6.5 MHz resonator in the ZX81. So I think you have to replace the resonator with a 7MHz type (gives 143ns pulses).
- Tue May 10, 2016 7:34 am
- Forum: Hardware
- Topic: Hi-res graphics mode in the ZX81
- Replies: 13
- Views: 6359
1024MAK wrote:mrtinb wrote:If I understand correctly - True Hires is either
- a memory expansion with Hires capability,
- a modified memory expansion, or
- an internal modification addition of RAM circuits.