[Coco] Programs larger than 32K?

William Astle lost at l-w.ca
Mon Jan 21 15:30:56 EST 2019


On a standard Disk Basic system after a cold start, it is, roughly. The 
second poke shoudln't be required (NEW should do that for you). If you 
dig up the right PEEKs, you can potentially do a bit better by putting 
the program immediately above the Disk buffers.

If you use this technique, just make sure you don't accidentally try to 
do any PMODE graphics commands or you'll clobber your program.

On 2019-01-21 1:21 p.m., Arthur Flexser wrote:
> I would think that POKE&H19,&HE:POKE&HE00,0:NEW would do the equivalent of
> PCLEAR 0, though I haven't tested this.
> 
> Art
> 
> On Sat, Jan 19, 2019 at 6:06 PM Allen Huffman <alsplace at pobox.com> wrote:
> 
>>
>> On Jan 19, 2019, at 4:36 PM, Evan Wright via Coco <coco at maltedmedia.com>
>> wrote:
>>>
>>> Do people have a main segment that is less than 32k, which puts the CoCo
>> in all-RAM mode, then load the remaining data from separate files?
>>
>> Here’s a bit of my research:
>>
>>
>> http://subethasoftware.com/2015/01/16/pclear-0-to-get-more-coco-basic-memory/
>>
>> It is possible to use the extra RAM on a CoCo 3, but it would take some
>> tricks in assembly on a CoCo 1/2 to Bank things in and out to get to data,
>> since banking out the ROMs would prevent you from running BASIC.
>>
>>
>> --
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>>
> 



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