PC to GS serial xfer progress report

["bw" <bwegher@hotmail.com>]

In exchange for a favor last weekend my neighbor gives me complete AppleIIgs 
sytem that was in closet for 15 years. Mint looking, just like a time 
capsule, keyboard does not even have any stains.
No documents, just CPU, one drive, ImagewriterII and a dozen 800k floppies. 
Appleworks, system, golf games, Broderbund printshop.
Opened case, all slots empty, dead battery, Apple memory expansion card has 
256k soldered on board, remaining sockets are empty.

Soldered new lithium batt into mainboard.
Plugged everything together, boots into GS/OS Finder 1.2, sharp color.
Tried POST, success. Control panel, success, switch to fast system. Success.
Miniputt, success
Appleworks, success,
Apple tour, success
Apple guide to Appleworks, success.
Jack Nicklaus golf, boots, but seems to have chronic rain, guessing a virus.

Check online, find out that pre-mac apples are now antiques, with specialty 
support.
Read some FAQs, check c.s.a2 and see some signs of life.
Look for RS232 null modem cable, but decide to try to make my own.
Two pieces of 22awg solid hookup wire. Twist together, push wire ends into 
GS modem port leftcenter, and rightcenter hole. Other ends attach to pins 2 
and 3 of COM1 port of backup Compaq486, Win3.1
Follow instructions in ADTgs. Put files onto PC, and open windows terminal, 
set to COM1. All defaults used, including 1200 baug.
Set GS control panel settings for XON/XOFF  and hardware handshaking OFF, 
1200 baud.
Reset GS into command prompt ] IN#2
On PC sent text mode file adtgs.dmp

Success !!
Hex characters appear on GS monitor. About a minute later, at end of dump, I 
see
BSAVE ADT, A$803,L$A14,S6,D1
STEP
00/000A:4C (FF)
00/0000E:00 .Trace
* (flashing cursor)

PC terminal off, I try entering BRUN ADT at cursor, but nothing.
Reboot GS/OS, no ADT file anywhere. I'm guessing now, time to do some more 
reading on the web, look for AppleBasic command manual, etc.

ADT only works for 5.25 inch drives?? I thought 3.5 inch drives were 
standard.
I'm looking for some TMS4256-15 chips to bring the memory up to maximum. 
Will 41256 chips be compatible with my 4256 chips?? Need to add a second 
800k drive.
If I unsolder the 4256 chips and solder in some sockets, can I use 1 meg x 1 
chips to get a total of 4 Megs on the expansion board? Or should I just get 
a 4 Meg board?