[Coco] Implications of the Speed Up Poke

[pfitchjr at bellsouth.net]

Remember, there are TWO speed up pokes involved here. One runs ROM at double speed, and RAM at standard speed, and should not be used during input/output. This is the FAST Speedup poke.  (and I guess I'm talking CoCo 1/2 here, as a CoCo 3 in all-ram mode probably wouldn't benefit since there is NO ROM in that mode). The second, SUPER FAST Poke, runs both ROM and RAM at double speed, makes a hash of your video display and stops talking to your keyboard, and that is the one that doesn't refresh RAM.  

So
Poke 65495,0 <--- enters FAST mode
Poke 65494,0 <-- exits fast mode

Poke 65497,0 <---Enters SUPER FAST mode
Poke 65496,0 <---Exits SUPER FAST mode

Tho the suggested commands to exit SUPER FAST mode are actually:

Poke 65497,0 <---Enters SUPER FAST mode
Poke 65495,0 <--- enters FAST mode
Poke 65496,0 <---Exits SUPER FAST mode
Poke 65494,0 <-- exits fast mode

The article I was reading is found in:
Micro-80, Volume 4, Number 3, October 1983, pg 7. I got the copy I'm using off of the Internet Archive, as the TRS-80 Color Computer Archive only has V3N1 atm. ( I guess I could upload the issues I have found to there as well.  I'll do that sometime today.)

-----Original Message-----
From: Coco <coco-bounces at maltedmedia.com> On Behalf Of Allen Huffman

Programs like Musica 2 on a CoCo 1/2 had the option to play music in the fast mode, losing video while the audio played at better quality. I never knew there was any RAM concern as you could play long songs with no issues.

What is the source of the RAM refresh concern?

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