Where is there a PC-relative load of a constant IN MY HOT LOOP.

```text
ldrb	r0, [r3, #0]
lsls	r0, r0, #2
ldr	r4, [pc, #784]	@ (20038f50 <neotron_pico_bios::vga::core1_main+0x5d0>)
ldr	r0, [r4, r0]
stmia	r1!, {r0}
subs	r2, r2, #1
adds	r3, r3, #1
cmp	r2, #0
bne.n	20038c38 <neotron_pico_bios::vga::core1_main+0x2b8>
```