8 Feb
2003
8 Feb
'03
5:04 p.m.
ben franchuk wrote:
A hidden gotya is the index registers are 8 bits. No
problem
for small dedicated control but somthing that limited high
level languages to Basic and Pascal p-code.
I'd have to disagree. There were plenty of other HLLs available
for the 6502. The 8-bit index register isn't an issue using
the indirect indexed addressing mode, e.g., "LDA (FOO),Y", in
which any pair of consecutive zero page locations can act as a
16-bit base, with the index register as an offset.
The biggest limitation for HLL support was the 256-byte stack
limit; if you needed more stack you had to roll your own.
It was certainly not as nice as a 6809, but then it predated
the 6809 by several years.