Sorry for the missunderstanding. Anyway, I'm sure that all memory paging
ports are read and write ports, bacause there is no other way to
determine which bank is currenly paged in.
LCD
Thomas Harte schrieb:
I meant are they read/write, or write only? However in the interim,
I've found a copy of the Technical Manual online and discovered that
they are read/write, which I wasn't expecting.
On 28 Aug 2008, at 21:06, Leszek Chmielewski wrote:
251 = High Memory Page Register
250= Low Memory Page Register
Greetings,
LCD
Thomas Harte schrieb:
Port 252 is read/write? Anybody got any idea about ports 250 & 251?
On 28 Aug 2008, at 20:22, Leszek Chmielewski wrote:
James R Curry schrieb:
Okay, utterly random question...
How does one determine the start address of the screen in Sam BASIC?
I forget.
It has been years.
-- James R Curry
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
SAM adv. technical manual says:
10 LET A=IN 252 BAND 31
20 LET BASE=(A+1)*16384
BASE=Start of Screen
greetings
LCD
P.S. But the structure of Information in Screen$ for Palette
interrupt changes is unknown to me yet. |-D.
