VIC20 Booting

Started by Baggey, March 17, 2023, 18:14:44

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Baggey

Also i have a VIC20 Booting 8)

Running a PC that just Aint fast enough!? i7 Quad core 16GB ram 1TB SSD. DID Technology stop! Or have we been assimulated!

ZX Spectrum 48k, C64, ORIC Atmos 48K, Enterprise 128K, The SID chip. ZX NEXT!? Oh i have a MISTY! Looking at a TEENSY! Could be better than a NEXTY!

Xerra

A Vic 20 with no memory. 

Without any memory expansion, this would normally report 3583 bytes free.

Baggey

Yeah it seems to have no Memory! Now in the Kernel there must be a memory check which should be working! Just to get to the Flashing Cursor prompt. Which also isnt working.

I belive the Cursor not flashing is something todo with the timer every 60th of a second in the CIA1 address $DC0D i think. I have messed around with.

Not sure why it's not showing any memory though? It in all purpose's should be displaying Maximum memory available!

I dont have the real machine to play with. Maybe there is some other circuit forcing a certain address with the amount available.

Or one of my flags or instructions aint quite right. But to emulate this far i feel something else is going on.

Kind Regards Baggey
Running a PC that just Aint fast enough!? i7 Quad core 16GB ram 1TB SSD. DID Technology stop! Or have we been assimulated!

ZX Spectrum 48k, C64, ORIC Atmos 48K, Enterprise 128K, The SID chip. ZX NEXT!? Oh i have a MISTY! Looking at a TEENSY! Could be better than a NEXTY!