paulo@mucs.UX.CS.MAN.AC.UK (Paulo L de Geus) (05/27/88)
A while ago someone posted a description of how a ram-disk using this connector works. A friend of mine wants to use this port to interface some external hardware and doesn't know how to write to it (it seems that a bus error is generated). Could anyone that saved that description e-mail me a copy, or else, if anyone knows how to achieve writing to the cartridge port please send me a short summary. Thanks in advance, -- Paulo L de Geus JANET: paulo@uk.ac.man.cs.ux Dept of Computer Science Internet: paulo%ux.cs.man.ac.uk@nss.cs.ucl.ac.uk Univ of Manchester USENET:...!mcvax!ukc!man.cs.ux!paulo Manchester M13 9PL U.K. BITNET: paulo%uk.ac.man.cs.ux@ukacrl.bitnet
hase@netmbx.UUCP (Hartmut Semken) (06/01/88)
In article <3986@mucs.UX.CS.MAN.AC.UK> paulo@mucs.UX.CS.MAN.AC.UK (Paulo L de Geus) writes: >A while ago someone posted a description of how a ram-disk using this >connector works. There are two possible solutions: - hack the hardware (I like this one!). If you generate your own DTACK, the Glue will not issue a BUSERR. BUSERR seems to be the output of a monoflop retriggered by Adress Strobe (right , Atari?). Disadvantage: Hmm, if you hack the hardware already, why use the cartridge port? - WRIT by READING. When you read the adress range of the cartridge port, an Adress is passed to the outside. Use the low part of the adress (LSByte) to put the data out (to a latch, latched by Chip Select). Forget the read value. Works well. I took this from a german magazine (c't). They do graet hardware hacks... hase -- Hartmut Semken, Lupsteiner Weg 67, 1000 Berlin 37 hase@netmbx.UUCP I think, you may be right in what I think you're thinking. (Douglas Adams)