![]() The CPU would start to fetch instructions from the text buffer, but the hardware would clear all bits fed to the CPU (00=NOP). ![]() ![]() (The less text you had on display, the less memory it used.) To display the text on the screen, you set a special bit in hardware and jumped to the RAM character buffer. To make the system very cheap, it had no dedicated video circuitry! You stored characters in RAM and ended each line with 0x76. (Why are all program so damned big nowadays?) It had 1 KByte of memory which also serverd as video memory! I remember that someone crammed in a chess program into that. ![]() It was the first complete system to sell for under 100 pounds, which was revolutionary cheap for the time. I bought it because it was very inexpensive. The first machine I bought was a Sinclair ZX-80. Sinclair machines were very popular over in Europe, right? Could anyone tell me why they took off over there and not over here?
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