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pearce_jj's latest activity
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pearce_jj
reacted to
Kanpai's post
in the thread
IBM 5155 keyboard cable... very oily
with
Like
.
I noticed the same oily substance on the cable of one of mine 5155. According to mass spectra analysis I conducted, this is likely...
Tuesday at 5:28 PM
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pearce_jj
reacted to
Hak Foo's post
in the thread
ISA USB board
with
Like
.
Been doing some light cleanup today. The startup messages are a bit terser (I didn't like that we were getting to the point where were...
Tuesday at 7:13 AM
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pearce_jj
replied to the thread
Backup battery and Main battery for Tandy 1400FD
.
Re main battery - the mAh capacity really doesn't matter - it just defines the run-time. More mAh will give more run time. Provided it's...
Monday at 7:06 PM
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pearce_jj
replied to the thread
Backup battery and Main battery for Tandy 1400FD
.
D-cell type are still available as used in some home alarm systems, for example...
Monday at 12:24 PM
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pearce_jj
reacted to
ross.dykes's post
in the thread
Tandy 1400 Lo-Tech XT-CF Help
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Like
.
Yes, it's been working just fine as long as only 1 floppy drive is installed. It does work with both installed if you modify the xt-ide...
Monday at 12:20 PM
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pearce_jj
reacted to
Hak Foo's post
in the thread
ISA USB board
with
Like
.
Uggh. I see the issue now. The way you described it originally, I thought FDISK was failing to launch at all. I was able to replicate...
Saturday at 3:53 AM
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pearce_jj
replied to the thread
ISA USB board
.
At least on 5160, it will need to use slot 8 or have a physical connection to the ROM socket(s). I’ve documented why here...
Friday at 8:19 AM
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pearce_jj
replied to the thread
ISA USB board
.
One challenge might be that the system board buffers make placement difficult. On 5160 for example, we cannot DMA from slot 8 but I...
Friday at 6:37 AM
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pearce_jj
reacted to
Hak Foo's post
in the thread
ISA USB board
with
Like
.
Well, the point of DISK_IN_BOUND was to be able to blow up early in a request if you asked for a sector beyond what the disc's reported...
Aug 4, 2022
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pearce_jj
replied to the thread
ISA USB board
.
The shadow function can potentially improve performance only on machines with 16-bit memory bus - 8086, v30, and 286 machines basically.
Jul 31, 2022
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pearce_jj
reacted to
MicroCoreLabs's post
in the thread
Drop-in 8088 CPU Emulator for the IBM PC - MCL86+
with
Like
.
I wanted to share my latest project, the MCL86+, which is a drop-in 8088 replacement board for the IBM PC/XT and clones. It uses a...
Jul 30, 2022
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pearce_jj
replied to the thread
ISA USB board
.
In my view it would be interesting to look at the file system capabilities of these chips themselves, since regardless of how tiny and...
Jul 30, 2022
P
pearce_jj
replied to the thread
ISA USB board
.
I've not costed these yet as the 1st draft designs are only just complete. The intention is to run a short batch of engineering samples...
Jul 30, 2022
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pearce_jj
replied to the thread
ISA USB board
.
Both the single socket and the new two socket version will be 4 layer boards and entirely SMD based. Bare PCBs account for a tiny...
Jul 29, 2022
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pearce_jj
replied to the thread
ISA USB board
.
Quick first look at what I've been working on - dual socket USB based storage adapter. One internal, one external. The component count...
Jul 27, 2022
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