Hi,
back in 1984-5 there was a ZX Spectrum mega-game being developed by Imagine
Software called Bandersnatch. It supposed to be true megagame with some special
hardware add-on, promising extra features. Imagine Software went bancrupcy and
ZX Spectrum version was never completed.
According to
Hi,
I am working on the new layout for QubIDE. I am wondering if anyone here would
be interested to get unassembled PCBs and make Qubide on his own. Complexity is
low, perhaps the biggest issue would be to get Eprom and GALs programmed.
Apart from this, I would like to know what are your
Hi Nasta, Thanks for great info.
available memory bandwidth, and usually less. When all is said and done,
you come out with about 50-60% bandwidth long term.
Thanks, thinking more about it, I should still address my time critical
routines into this slow-ULA memory rather than to expanded
Thanks Marcel!
I'm no hardware guy, but I'm pretty sure the ULA locks ALL internal
memory during screen refresh, i.e. depending on model (EU/US) 50 or 60
times per second. The CPU cannot access anything at all during these
times.
OK, I will measure read/write time in the vram anyway. ULA should
Hi all,
I am working on some timing critical routines for standard QL w/wo SandyQboard
512 (no GC, no Aurora). Do you know how is memory shared between CPU and ULA?
Do you know how (if at all) is memory delayed when you need to access videoram
at the same time ULA is accessing it? Is there any
