I finally learned what poke -1,170 does

Resident (41)

25-09-2017, 07:23

For 30 years this used to be 'one of those magic things that you do'.

But I have been learning about subslots, and today I realized that poke -1,170 is to change the subslot to make sure RAM will be mapped into 0000-7fff. This also explains why it's different on Turbo-R... the RAM is in a different subslot.

That is all

By TheKid

Paragon (1238)

25-09-2017, 08:31

and what is the equavalent for poke -1,170 on a turbo R ?

By ro

Scribe (4921)

25-09-2017, 08:50

wasn't that poke -1,&HAA ?

By Grauw

Ascended (10716)

25-09-2017, 09:37

https://www.faq.msxnet.org/miscfaq.html

Quote:

How can I let most of the MSX1 software work on MSX2 machines/what is the universal slot-select-correct POKE?
The universal poke to do this is:
POKE -1,1.0625*(NOT(PEEK(-1))AND&HF0)
The same POKE, but a bit shorter:
POKE -1,(15-PEEK(-1)\16)*17

Harder to remember, but works on every machine :D.

(Replace "poke -1," with "print" to see the exact number.)

By meits

Scribe (6534)