This is an archive of CompuServe forum messages from 1985 to 1995, as saved in transcripts by John Foust.
Search Results (279 messages)
#28485-
#PRESTEL VIDEOTEX TRM PGM
Message #28511
big problem: the amiga's UART isn't capable of split speeds – the prestel thing needs 1200 baud receive and 75 baud xmit, but the amiga can only rcv/xmt at one speed. even if you found a vidtex program, you wouldn't be able to get the amiga talking to the host.…
#28485-
#PRESTEL VIDEOTEX TRM PGM
Message #28511
big problem: the amiga's UART isn't capable of split speeds – the prestel thing needs 1200 baud receive and 75 baud xmit, but the amiga can only rcv/xmt at one speed. even if you found a vidtex program, you wouldn't be able to get the amiga talking to the host.…
#27858-
#V1.2 & AmigaBASIC
Message #27870
the bugs i've found in 1.2 beta 4 include (of course) amigabasic not working, a couple neat things with the RAMdisk icon on the workbench (try dragging another disk icon onto it, as if you were copying a disk – it gets real confused.) also, with RAMdisk on WB again,…
#27858-
#V1.2 & AmigaBASIC
Message #27870
the bugs i've found in 1.2 beta 4 include (of course) amigabasic not working, a couple neat things with the RAMdisk icon on the workbench (try dragging another disk icon onto it, as if you were copying a disk – it gets real confused.) also, with RAMdisk on WB again,…
TAS is not designed to throw out multiprocessing, but to FACILITATE it. if you got it, support it.
TAS is not designed to throw out multiprocessing, but to FACILITATE it. if you got it, support it.
who would need TAS unless there was another CPU out there? –Scotty
who would need TAS unless there was another CPU out there? –Scotty
two guys i used to work with are at cauzin. i'll give 'em a call and see if they'll let me do some amigastuff for softstrips. –Scotty
two guys i used to work with are at cauzin. i'll give 'em a call and see if they'll let me do some amigastuff for softstrips. –Scotty
but all those DMA channels affect only INTERNAL RAM. there should be no problem with the slave being outside the box. –Scotty
but all those DMA channels affect only INTERNAL RAM. there should be no problem with the slave being outside the box. –Scotty
interesting, about TAS on internal RAM. but what about external RAM? why shouldn't it be a little more sane? i can understand the limitations of TAS on the internal RAM, where there are rigid timing constraints due to video access and other "fixed" DMA. but why should something outside the…
interesting, about TAS on internal RAM. but what about external RAM? why shouldn't it be a little more sane? i can understand the limitations of TAS on the internal RAM, where there are rigid timing constraints due to video access and other "fixed" DMA. but why should something outside the…
#24157-
Crashed disk in df1:
Message #24240
during boot, the system (for some reason) goes out and looks at the disk in DF1: (if any). apparently, if they get a disk error before the CLI and stuff is awake (which would be your case), they just die. there is no way for a message to be displayed,…
#24157-
Crashed disk in df1:
Message #24240
during boot, the system (for some reason) goes out and looks at the disk in DF1: (if any). apparently, if they get a disk error before the CLI and stuff is awake (which would be your case), they just die. there is no way for a message to be displayed,…
i don't understand what the big deal is. the dma device asserts BR*, the 68000 gives BG*, and the dma device waits for AS* to go high, and then asserts BGACK*. at least that's what i understand from all the 68000 books i have. i really don't see the big…
i don't understand what the big deal is. the dma device asserts BR*, the 68000 gives BG*, and the dma device waits for AS* to go high, and then asserts BGACK*. at least that's what i understand from all the 68000 books i have. i really don't see the big…
it's an asynchronous bus, for
it's an asynchronous bus, for
it's TAS. yeah, it's rare. but why limit software with hardware?? why do you think we got amigas in the first place? and how might a RMW cycle cause a DMA device to stumble and fall? –Scotty
it's TAS. yeah, it's rare. but why limit software with hardware?? why do you think we got amigas in the first place? and how might a RMW cycle cause a DMA device to stumble and fall? –Scotty
#23956-
ARCHIVE FILES
Message #24063
I'm talking about 1.1's RAM:. i never ever use it. you can't make assumptions about the way a program uses files, so you never know if it's going to do the Seek() call with the right parameters to get garbage back. the amiga doesn't crash, but it reads/writes junk to…
#23956-
ARCHIVE FILES
Message #24063
I'm talking about 1.1's RAM:. i never ever use it. you can't make assumptions about the way a program uses files, so you never know if it's going to do the Seek() call with the right parameters to get garbage back. the amiga doesn't crash, but it reads/writes junk to…
no. what they do is provide no external control over when a refresh gets done (ie, no way to synchronize a refresh with an empty bus cycle). they simply provide select and read/write inputs, and give you a wait signal for output. gag. –Scotty
no. what they do is provide no external control over when a refresh gets done (ie, no way to synchronize a refresh with an empty bus cycle). they simply provide select and read/write inputs, and give you a wait signal for output. gag. –Scotty
ttl – phooey. thanks, but no thanks. –Scotty
the smear problem isn't so bad with text – it might be a little annoying with graphics. to see an example of the smear, watch an ibm monochrome monitor while text scrolls. –Scotty
#23448-
Memory Expansion
Message #23506
fear not, the timing isn't that bad at all. especially with the resolution my timing generator provides. –Scotty
#23446-
Memory Expansion
Message #23505
to provide something for other stuff to plug into, of course. –Scotty
well, i think i've come up with a circuit that will allow hidden refresh after any AS* cycle, and will do it's own refreshing when the bus is inactive, but will only "manually" refresh those addresses which haven't been hit by the automatic refresh in the last 4 ms. according…
well, i think i've come up with a circuit that will allow hidden refresh after any AS* cycle, and will do it's own refreshing when the bus is inactive, but will only "manually" refresh those addresses which haven't been hit by the automatic refresh in the last 4 ms. according…
software refresh?!? looks like the best thing to do is squeeze the hidden refresh in, or to space the required 256 refresh cycles out over the 4ms time period, doing one whenever there's an AS* cycle that we don't respond to. again, you run into the "what happens when it…
software refresh?!? looks like the best thing to do is squeeze the hidden refresh in, or to space the required 256 refresh cycles out over the 4ms time period, doing one whenever there's an AS* cycle that we don't respond to. again, you run into the "what happens when it…
look in the 68000 book. XRDY is basically an inverted DTACK*. i think you should let go of XRDY once you have begun your memory cycle (ie, RAS* has gone to the RAMs). –Scotty
look in the 68000 book. XRDY is basically an inverted DTACK*. i think you should let go of XRDY once you have begun your memory cycle (ie, RAS* has gone to the RAMs). –Scotty
#23187-
#Memory Expansion
Message #23190
let's try that again, in english this time: you have to pull XRDY low within 60ns after AS* goes low. –Scotty
#23187-
#Memory Expansion
Message #23190
let's try that again, in english this time: you have to pull XRDY low within 60ns after AS* goes low. –Scotty
there is no such thing as "screen read." try this: while (serial has char) put serial char in buffer if (keyboard has char) send keyboard char endwhile put serial input buffer to screen repeat –Scotty
there is no such thing as "screen read." try this: while (serial has char) put serial char in buffer if (keyboard has char) send keyboard char endwhile put serial input buffer to screen repeat –Scotty
the problem with using DTACK* is that the amiga expansion docs specify that it is driven by a TTL line in the amiga – not tristate or open collector, so THOU SHALT NOT DRIVE DTACK*. unless, of course, you also drive OVR*, which supposedly disables all signal driving in the…
the problem with using DTACK* is that the amiga expansion docs specify that it is driven by a TTL line in the amiga – not tristate or open collector, so THOU SHALT NOT DRIVE DTACK*. unless, of course, you also drive OVR*, which supposedly disables all signal driving in the…
unfortunately, the amigados Read() waits for the serial input buffer to fill (512 characters) before it returns anything to you. kinda difficult to use, since if you were to write a terminal program using Read() you would have to get 512 characters from the serial port before it displayed anything.…
unfortunately, the amigados Read() waits for the serial input buffer to fill (512 characters) before it returns anything to you. kinda difficult to use, since if you were to write a terminal program using Read() you would have to get 512 characters from the serial port before it displayed anything.…
whoah! that video card you're talking about just sits there and accepts CHARACERS; the amiga's display is memory mapped, bit mapped graphics – the software has to DRAW the characters, once for each bitplane (one bitplane for each bit of color – from 1 to 5 times). just to increase…
whoah! that video card you're talking about just sits there and accepts CHARACERS; the amiga's display is memory mapped, bit mapped graphics – the software has to DRAW the characters, once for each bitplane (one bitplane for each bit of color – from 1 to 5 times). just to increase…
#22393-
Text Editors
Message #22434
it's possible to change ED's tab spacing – ed a junk file (a nonexistant one) and then use the STn command to set tabs to what you like, then use the IF/name/ to read in your file.
#22393-
Text Editors
Message #22434
it's possible to change ED's tab spacing – ed a junk file (a nonexistant one) and then use the STn command to set tabs to what you like, then use the IF/name/ to read in your file.
musicraft 0.99 don't run either. but it's prerelease anyway, so who knows. –Scotty
musicraft 0.99 don't run either. but it's prerelease anyway, so who knows. –Scotty
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