Apple-2-SW/rom4x
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15 Commits 7 Branches 6 Tags 190 KiB
c4b1070329
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5 Commits

Author SHA1 Message Date
mgcaret
c4b1070329 Simplify bootable ramdisk detection. Jump to AppleSoft if no boot device. 
I discovered that there are more than one ProDOS boot block in the wild, so I
simplified the check for recoverable RAM disk to check card for $01 and then
anything besides $00 and $FF since most uninitialized RAM tends to have one of
those two values.  This is slightly more rigid than the boot code checks for.
I added a jump to AppleSoft if no bootable device is found.  I changed the
message a little bit, too.
I also added notes about the feasibility of using the RamFactor firmware.
 2017-01-12 19:40:55 -08:00
mgcaret
1a8942bc97 save a byte 2017-01-03 23:17:01 -08:00
mgcaret
3458d8e7be I changed the msg format and forgot to adjust the code comment to match. fixed. 2017-01-03 23:02:00 -08:00
mgcaret
64fe87caed Fix ramdisk recovery to happen whether or not ca was pressed. 
Optimize some wee hours/YOLO code into something sensible.
Ensure that ram card slot rom space is twiddled so the registers are active.
 2017-01-03 21:19:47 -08:00
mgcaret
1cf35fd0f8 Initial code commit 2017-01-03 18:43:31 -08:00