Trawling Github, by chance I found a very simple video display circuit that I thought may be useful for a picaxe, the bad news it uses an Atmel Attiny85 (heresy! ). The ATtiny can generate display 32 x 16 characters of text on VGA output with 6x10 pixel font, data is sent serial at 9600bps. The display is controlled by a limited few ANSI escape codes, I have not been able to determine how it all works yet, however a monochrome display printing plain text is not difficult.
I have not yet managed to do graphics and at 64X64 resolution I'm not sure if it's worth the trouble. Cascading three ATtinys enables an eight colour display but again I'm not sure if it justifies the effort. I thought the low component count for a monochrome display (one attiny one 20 mHz oscillator a few passives and a VGA socket) possibly justified purchasing a cheap AVR programmer, those with a pickit2 or a real com port on their PC will have no bother burning the chip. The link is below.
I have not yet managed to do graphics and at 64X64 resolution I'm not sure if it's worth the trouble. Cascading three ATtinys enables an eight colour display but again I'm not sure if it justifies the effort. I thought the low component count for a monochrome display (one attiny one 20 mHz oscillator a few passives and a VGA socket) possibly justified purchasing a cheap AVR programmer, those with a pickit2 or a real com port on their PC will have no bother burning the chip. The link is below.
GitHub - rakettitiede/octapentaveega: OctaPentaVeega - Fun hobby project to get 32x16 characters VGA output from Attiny85 with 9600 bps UART
OctaPentaVeega - Fun hobby project to get 32x16 characters VGA output from Attiny85 with 9600 bps UART - rakettitiede/octapentaveega
github.com