Manic1975 Posted August 14, 2014 Share Posted August 14, 2014 (edited) Is it possible to expand memory in Mini Memory? It Have 4k of memory. Why not more memory? I didn't find any ideas how to expand mini memory. Edited August 14, 2014 by Manic1975 Quote Link to comment Share on other sites More sharing options...
+save2600 Posted August 14, 2014 Share Posted August 14, 2014 Pretty sure Mini Memory is all it can be due to cartridge port limitations. 1 Quote Link to comment Share on other sites More sharing options...
Willsy Posted August 14, 2014 Share Posted August 14, 2014 The area of CPU memory mapped out to the cartridge port is a maximum of 8K. The mini-mem ROM is 4K and the RAM is 4K. The RAM could be expanded, but bank switching techniques would be required, meaning at least one more chip inside the mini-mem cart. The 4K RAM of the Mini-Mem is actually quite generous; it's surprising what you can fit in 4K 2 Quote Link to comment Share on other sites More sharing options...
RXB Posted August 15, 2014 Share Posted August 15, 2014 There was a mod by using the GRAMULATOR where you could patch the Mini Memory GROM and it would talk to the 4 banks of the Miltion Bradly type of bank switching 4K. This gave you four 4K banks of upper 4K RAM from >7000 to >7FFF which is 4x4=16K RAM but I think you could do the same thing with the HSGPL card. 2 Quote Link to comment Share on other sites More sharing options...
+Ksarul Posted August 24, 2014 Share Posted August 24, 2014 I'd never seen a reference to that one before, Rich. Many thanks. Do you still have access to the actual mod so that we can preserve it? 1 Quote Link to comment Share on other sites More sharing options...
RXB Posted August 24, 2014 Share Posted August 24, 2014 Well it is in the manuals: ftp://kirklanduncorked.com/datasheets%20and%20manuals/Hardware/CaDD/gramulator%20manual.pdf https://groups.yahoo.com/neo/groups/ti99-4a/conversations/messages/58370 http://www.99er.net/tifaq2.html Not sure where all the data is but it should be somewhere on how it works along with the source code. I think in WHTECH FTP ftp://ftp.whtech.com/ But finding something on WHTECH FTP is always a nightmare as there is no GRAM section for GRAM devices. So not sure where it is today. It used to be on the C.A.D.D. site but that site has been down for ages... Quote Link to comment Share on other sites More sharing options...
+Lee Stewart Posted August 24, 2014 Share Posted August 24, 2014 ... It used to be on the C.A.D.D. site but that site has been down for ages... Not sure where it would be on the CaDD site (same as C.A.D.D.?); but, that site is alive and well: CaDD ...lee Quote Link to comment Share on other sites More sharing options...
RXB Posted August 24, 2014 Share Posted August 24, 2014 Yea all the GRAMULATOR stuff is no longer there? Quote Link to comment Share on other sites More sharing options...
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