Bil Herd wrote:

> On the C128 MMU, EXROM and GAME are general purpose input/output pins.

This is perhaps a bit off-topic, but does anyone have experience with 
various fast loader/freezer cartridges and which computers they work on? I 
have at least a breadbox C64, a C64C, a C128, a C128D (all PAL) and a NTSC 
SX-64. In the array of cartridges and expansions I've tried a TFC3, an AR6, 
a Handic SuperBox expansion and some unknown c:a 20 cm extention (!) cord 
for the cartridge port.

The test results were a bit erratic. On the regular C64's, I believe all 
combinations of cartridges, expansions and the extention cord tend to work 
fine. Frankly I haven't really tried the regular C128, but on the C128D I 
seem to remember the AR6 wouldn't boot properly, at least not when connected 
through the extention cord. Since its cartridge port is in the back, far 
away from the user I thought it would be sweet if the cartridge could be 
accessed in a simpler manner.

On the SX-64, the AR6 built in fastloader freezes instantly. Perhaps it is 
due to the machine is an NTSC one while the cartridge is meant for (??) PAL 
machines. The TFC3 however worked fine and would load programs using its 
fastloader.

Would all this be funny coincidences, or at least in the case of C128 
anomalities have anything to do with how it boots and reads the signals? 
Unfortunately I sold my last TFC3 a few months back but I could always go 
shopping for another one since I found it most compatible with the "oddball" 
C64 compatible computers. Besides the sd2iec based devices support the TFC3 
fastloader but not the AR6, but that is another topic.

Best regards

-- 
Anders Carlsson


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