ZX Spectrum (was Re: Commodores )
lproven at gmail.com
Tue Dec 4 14:07:25 CST 2007
On 02/12/2007, Gordon JC Pearce <gordonjcp at gjcp.net> wrote:
> One final alternative is that on the Speccy 128 you could flip between
> two addresses for the screen RAM with a bit on one of the IO ports. By
> switching during the screen draw time, you could do lovely smooth wipes.
I was going to comment on that.
I still to this day think it's a crying shame that Sinkers didn't use
the enhanced ULA from the Timex-Sinclair 2068 in the Spectrum 128. The
more flexible RAM paging scheme would have been a boon, too - the
TS2068 could page out the ROM making a CP/M port for the Speccy
The Amstrad +3 could do that too, but it didn't have the better ULA
either, so you were stuck with a 32*24 text display - not a lot of use
for Wordstar or Supercalc - or weeny 4-pixel wide characters for 64
columns and eye-strain.
The 2068 could do 64 columns of 8-pixel wide characters, meaning that
an 80 column screen of fairly legible 7-pixel wide characters was
viable. Plus it also had a mode that largely got rid of attribute
clash - still only 32 columns of colours, but a different set every
pixel line. (Screen resolution 256*192, colour resolution 32*192. Even
weirder than a normal Speccy.)
I'm sure with a bit of work they could have made a TS2068-alike that
was entirely Speccy compatible in 48K mode but had a better BASIC in
128K mode. Even the SAM Coupe managed that, an entirely third-party
machine with a faster Z80.
Liam Proven • Profile: http://www.linkedin.com/in/liamproven
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