If you use IC sockets for the RAM chips (ie. expanded 1700 or 1764), you may want to remove them to leave more room to add RAM chips.
Here is a simple REU memory test that should be used in your own software. It works with all sizes of REUs! Although it is written in BASIC with a REU wedge for the C64, it can be easily converted to machine language. It returns the number of 64kb banks that are useable, which = (maximum bank number)+1.
2000 REM **** Initialize ****
2010 REM Put a single "status" byte,
2011 REM that shows an unchecked bank,
2012 REM in every possible REU bank.
2020 POKE 49152,136
2030 FOR I=0 TO 255
2040 !STASH 1,49152,0,I
2050 NEXT
2060 REM **** Test ****
2070 REM Test # banks present by seeing
2071 REM if bank is checked yet. If not
2072 REM then change status of bank to
2073 REM checked, and add 1 to the #
2074 REM of banks. Else, bank is
2075 REM checked already, and we're
2076 REM done!
2100 POKE 49152,27
2110 I=0
2120 !FETCH 1,49152,0,I
2130 IF PEEK(49152)<>136THEN 2190
2140 POKE 49152,27
2150 !STASH 1,49152,0,I
2160 I=I+1:IF I<256 THEN 2120
2170 REM **** DONE ****
2180 REM Number of banks of 64kb is now
2181 REM in I.
2190 IF I=0 THEN PRINT"REU NOT PRESENT"
2200 IF I=2 THEN PRINT"THIS IS A 1700 (128 K) REU"
2210 IF I=4 THEN PRINT"THIS IS A 1764 (256 K) REU"
2220 IF I=8 THEN PRINT"THIS IS A 1750 (512 K) REU"
2230 IF I>( THEN PRINT"THIS IS AN EXPANDED";64*I;"K REU"
This is just what I'v been looking for!! Now I have to write a ML driver prg to animate 208 full color and size koala pics from the reu to the screen!! It should yeild about 5 seconds of animation that will rival an AMIGA!
Thanks RECURSION,I'll post up my Animator64/128 when completed!!
BUT! For a sloppy, quick fix do the following: don't CONVERT the file, and use the geowrite to cbm BASIC program converter available on q-link. It will be very messy without any formatting, but it is better than nothing!
As soon as I find a decent 80 column text editor for the c64, I'll upload the SEQ file (that anyone can read).
Well I can say that this does work because I did it. I have 1 meg now :) I only fownd that Super Snapshot's monitor works with it Vershion 5 :) I hope some one will get GEOS to work with this. A 1581 RAM would be so nice!
I also have a one meg REU? I made alot of mistakes like not reading the whole thing thru. I am not a computer genius by all means but it does work. I found that when I wired the chips together it was easyer to cut out a half inch strip by 3 inch piece of butter dish lid plastic and thumb tack it to the work bench. I then put the foam tape on the plastic and placed the chips on it. After wiring the chips I cut the excess half inch of plastic on both end of the strip and used the double sided tape to put the chip configuration in the REU.
then I completed the rest of the connections to the REU. Doing that helped me from fumbling with the REU alot and make the job a little simpler.
